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Depositional process of hyperpycnal flow deposits:A case study on Lower Cretaceous Sangyuan outcrop in the Luanping Basin,Northeast China
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作者 De-zhi Yan Ru-kai Zhu +8 位作者 Hao Shou Zhao-hui Xu Wei-hong Liu Si-cheng Zhu Zhi-cheng Lei Jing-ya Zhang Chang Liu Yi Cai Huai-min Xu 《China Geology》 CAS CSCD 2024年第3期505-516,共12页
Sedimentary process research is of great significance for understanding the distribution and characteristics of sediments.Through the detailed observation and measurement of the Sangyuan outcrop in Luanping Basin,this... Sedimentary process research is of great significance for understanding the distribution and characteristics of sediments.Through the detailed observation and measurement of the Sangyuan outcrop in Luanping Basin,this paper studies the depositional process of the hyperpycnal flow deposits,and divides their depositional process into three phases,namely,acceleration,erosion and deceleration.In the acceleration phase,hyperpycnal flow begins to enter the basin nearby,and then speeds up gradually.Deposits developed in the acceleration phase are reverse.In addition,the original deposits become unstable and are taken away by hyperpycnal flows under the eroding force.As a result,there are a lot of mixture of red mud pebbles outside the basin and gray mud pebbles within the basin.In the erosion phase,the reverse deposits are eroded and become thinner or even disappear.Therefore,no reverse grading characteristic is found in the proximal major channel that is closer to the source,but it is still preserved in the middle branch channel that is far from the source.After entering the deceleration phase,normally grading deposits appear and cover previous deposits.The final deposits in the basin are special.Some are reverse,and others are normal.They are superimposed with each other under the action of hyperpycnal flow.The analysis of the Sangyuan outcrop demonstrates the sedimentary process and distribution of hyperpycnites,and reasonably explain the sedimentary characteristics of hyperpycnites.It is helpful to the prediction of oil and gas exploration targets in gravity flow deposits. 展开更多
关键词 Hyperpycnal flow Sedimentary characteristics depositional process Gravity flow deposit Hyperpycnite Red mud pebble Gray mud pebble Oil and gas exploration engineering Luanping Basin
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Post-depositional modification of NO_3 in snow layers at East Antarctica and atthe headwater of Urumqi River
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作者 侯书贵 秦大河 +1 位作者 任贾文 效存德 《Chinese Journal of Polar Science》 2000年第1期18-24,共7页
Acidic species, such as Nitrate, in polar snow and firn layers are “reversibly” deposited, and are sufficiently volatile to undergo significant post depositional exchange between snow/firn and the atmosphere. Throug... Acidic species, such as Nitrate, in polar snow and firn layers are “reversibly” deposited, and are sufficiently volatile to undergo significant post depositional exchange between snow/firn and the atmosphere. Through comparison of the snowpit and snowpack nitrate concentrations from central East Antarctica and the headwater of rumqi River, we conclude that the nitrate peaks in the uppermost surface snow layers in central Antarctica are not related to an atmospheric signal and must account for post depositional effects. Such effects, however, are not found in the surface snowpack nitrate profiles from the headwater of rumqi River. Two reasons may account for the post depositional difference. At first, nitrate in the polar snow and firn layers appears to be hydrated ion, which can be taken up by the atmosphere, while at the headwater of rumqi River it seems mainly as mineral ion, which assembles the behavior of aerosol derived species that are “irreversibly” deposited and do not undergo significant post depositional exchange with the atmosphere. Secondly, the chemical features of the snow and ice on the Antarctica are mainly determined by wet deposition, to the contrary, dry deposition is more significant at the headwater of rumqi River than that on the East Antarctic Plateau. 展开更多
关键词 NO 3 surface snowpack depositional processes East Antarctica the headwater of rumqi River.
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Numerical Study on Dry Deposition Processes in Canopy Layer
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作者 雷孝恩 Julius S.Chang 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1992年第4期491-500,共10页
A coupling model between the canopy layer(CL) and atmospheric boundary layer (ABL) for the study of dry deposition velocity is developed. The model consists of six parts: chemical species conservation equation includi... A coupling model between the canopy layer(CL) and atmospheric boundary layer (ABL) for the study of dry deposition velocity is developed. The model consists of six parts: chemical species conservation equation including absorptive factor; the species uptake action including detailed vertical variation of absorptive element in CL; momentum exchange in CL which is represented by a first-order closure momentum equation with an additional larger-scale diffusive term; momentum exchange in ABL which is described by a complete set of the ABL turbulent statistic parameters; absorptivity (or solubility or reflection) at the surface including effects of the physical and chemical characters of the species, land type, seasonal and diurnal variations of the meteorological variables; and deposition velocity derived by distributions of the species with height in CL. Variational rules of the concentration and deposition velocity with both height and time are simulated with the model for both corn and forest canopies. Results predicted with the bulk deposition velocity derived in the paper consist well with experimental data. 展开更多
关键词 Numerical Study on Dry Deposition processes in Canopy Layer
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The Metallogenetic Processes and Environment of a Large Ag-V Deposit in Black Rock Series
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作者 LIU Yuanjun JIN Guanfu +2 位作者 XIE Fapeng YANG Zhenqiang CHEN Kaixu 《资源环境与工程》 2016年第B04期116-118,共3页
Located in Western Hubei Province,this deposit is a large-scale Ag-V ore deposit,listed among the fifth type of silver deposit in China.1 Geological Characteristics It lies in the NE sector of the Yangtze flat of the ... Located in Western Hubei Province,this deposit is a large-scale Ag-V ore deposit,listed among the fifth type of silver deposit in China.1 Geological Characteristics It lies in the NE sector of the Yangtze flat of the Yangtze paraplatform.There are sporadically magmatic rocks and fold basement made up of upper Archaeozoicmiddle and lower Proterozoic strata.The sedimentary cover consists of Sinian-lower Paleozoic marine sediments,Mesozoic-Cenozoic intercalated marine and nonmarine sediments or nonmarine sediments. 展开更多
关键词 The Metallogenetic processes and Environment of a Large Ag-V Deposit in Black Rock Series AG
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Ag Deposition Forms and Uniformity on Porous Silicon by Electrochemical Method 被引量:1
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作者 宋晓岚 徐大余 +2 位作者 杨海平 喻振兴 邱冠周 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2010年第2期211-216,I0002,共7页
The electrochemical deposition technique was applied to achieve porous silicon (PS) surface passivated with Ag deposition for improving the properties of PS photoluminescence. The relation of Ag depositing forms to ... The electrochemical deposition technique was applied to achieve porous silicon (PS) surface passivated with Ag deposition for improving the properties of PS photoluminescence. The relation of Ag depositing forms to current density and the effect of PS hydrophilic surface on deposition uniformity were investigated. The experimental results indicated that there were two critical current densities (maximum and minimum) in which Ag was absent and electroplated on PS surface correspondingly, and the range of current density for deposition of Ag on porous silicon was from 50 μA/cm^2 to 400 μA/cm^2. The process of changing PS surface from hydrophobic into hydrophilic had positive effect on Ag deposition uniformity. Under the same experimental conditions, PS hydrophobic surface presented uneven Ag deposition.However, hydrophilic surface treated with SC-1 solution was even. Finally, the effect of PS surface passivation with Ag even deposition on photoluminescence intensity and stabilization of PS was studied. It was discovered that Ag passivation inhibited the degradation of PL intensity effectively. In addition, excessive Ag deposition had a quenching effect on room-temperature visible photoluminescence of PS. 展开更多
关键词 Porous silicon Photoluminescence Hydrophilic process Ag deposition Passivation
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Properties of TiO_2 Thin Films Prepared by Magnetron Sputtering 被引量:7
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作者 WenjieZHANG YingLI 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2002年第2期101-107,共7页
With rapid progressive application of TiO2 thin films, magnetron sputtering becomes a very interesting method to prepare such multi-functional thin films. This paper focuses on influences of various deposition process... With rapid progressive application of TiO2 thin films, magnetron sputtering becomes a very interesting method to prepare such multi-functional thin films. This paper focuses on influences of various deposition processes and deposition rate on the structures and properties of TiO2 thin films. Anatase, rutile or amorphous TiO2 films with various crystalline structures and different photocatalytic, optical and electrical properties can be produced by varying sputtering gases, substrate temperature, annealing process, deposition rate and the characteristics of magnetron sputtering. This may in turn affect the functions of TiO2 films in many applications. Furthermore, TiO2-based composites films can overcome many limitations and improve the properties of TiO2 films. 展开更多
关键词 TiO2 thin film magnetron sputtering deposition process composite film.
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Processing and Microstructure of LaCrO_3 Thin Film Derived from Chelating Precursors 被引量:4
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作者 卢旭晨 徐廷献 董向红 《Journal of Rare Earths》 SCIE EI CAS CSCD 2000年第3期196-200,共5页
LaCrO 3 thin films were successfully prepared at lower temperatures by the sol gel process based on organic chelating precursors. The formation and transition of the gel derived from the chelate solution were analyz... LaCrO 3 thin films were successfully prepared at lower temperatures by the sol gel process based on organic chelating precursors. The formation and transition of the gel derived from the chelate solution were analyzed by means of IR, DTA TG, XRD and TEM. In addition, the formation and microstructure of thin films were investigated by SEM and XRD. The results show that the gel formed by the condensation reaction is decomposed at about 195 ℃, transformed into a great quantity of LaCrO 3 by heat treating at 200 ℃ for 1 h, and the complexing ways in the gel have an important influence upon the formation of LaCrO 3. The formation process of thin film includes the nucleation and growth on the substrate, the formation of polycrystalline islands and the continuous film by repeating the dip coating process. Higher heat treatment temperature gives rise to larger granules in the thin film. 展开更多
关键词 rare earths thin film deposition process organic chelate lanthanum orthochromite
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Mathematical model and magnetic-control mechanism of the stability of rotating spray transfer 被引量:14
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作者 殷树言 陈树君 +1 位作者 王军 徐鲁宁 《China Welding》 EI CAS 2003年第1期57-61,共5页
To realize stable rotating spray transfer in the region of high constant current is the key of realizing high deposition rate MAG welding process without helium in shielding gas and extending the welding current rang... To realize stable rotating spray transfer in the region of high constant current is the key of realizing high deposition rate MAG welding process without helium in shielding gas and extending the welding current range of traditional MAG welding process. In this paper, the magnetic control mechanism of the rotating spray transfer is stated and mathematical model is given. Theoretic basis is established, which implements high deposition rate MAG welding process with magnetic control instead of helium in shielding gas. 展开更多
关键词 magnetic control rotating spray transfer high deposition rates MAG welding process mathematical model
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Sedimentary characteristics and internal architecture of a river-dominated delta controlled by autogenic process:implications from a flume tank experiment 被引量:3
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作者 Wen-Jie Feng Chang-Min Zhang +5 位作者 Tai-Ju Yin Yan-Shu Yin Jun-Ling Liu Rui Zhu Qing-Hai Xu Zhe Chen 《Petroleum Science》 SCIE CAS CSCD 2019年第6期1237-1254,共18页
Autogenic processes are widely found in various sedimentary systems and they play an important role in the depositional evolution and corresponding sedimentary architecture.However,autogenic processes are often affect... Autogenic processes are widely found in various sedimentary systems and they play an important role in the depositional evolution and corresponding sedimentary architecture.However,autogenic processes are often affected by changing allogenic factors and are difficult to be identified and analyzed from modern and ancient records.Through the flume tank experiment under constant boundary conditions,the depositional process,evolution principles,and the sedimentary architecture of a river-dominated delta was presented,and a corresponding sedimentary architecture model was constructed.The evolution of river-dominated delta controlled only by autogenic process is obviously periodic,and each autogenic cycle can be divided into an initial progradational stage,a middle retrogratational stage,and a late aggradational–progradational stage.In the initial progradational stage,one feeder channel incised into the delta plain,mouth bar(s)was formed in front of the channel mouth,and small-scale crevasse splays were formed on the delta plain.In the middle retrogradational stage,the feeder channel was blocked by the mouth bar(s)which grew out of water at the end of the initial stage,and a set of large-scale distributary splay complexes were formed on the delta plain.These distributary splay complexes were retrogradationally overlapped due to the continuous migration of the bifurcation point of the feeder channel.In the late aggradational–progradational stage,the feeder channel branched into several radial distributary channels,overlapped distributary channels were formed on the delta plain,and terminal lobe complexes were formed at the end of distributary channels.The three sedimentary layers formed in the three stages constituted an autogenic succession.The experimental delta consisted of six autogenic depositional successions.Dynamic allocation of accommodation space and the following adaptive sediments filling were the two main driving factors of the autogenic evolution of deltas. 展开更多
关键词 River-dominated delta Autogenic process depositional process Sedimentary architecture Flume tank experiment
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Remarkable carbon dioxide catalytic capture (CDCC) leading to solid-form carbon material via a new CVD integrated process (CVD-IP): An alternative route for CO_2 sequestration 被引量:5
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作者 Wei Chu Maofei Ran +4 位作者 Xu Zhang Ning Wang Yufei Wang Heping Xie Xiusong Zhao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第1期136-144,共9页
Through our newly-developed "chemical vapor deposition integrated process (ISVD-IP)'" using carbon OlOXlae (t..u2) as me raw matenal and only carbon source introduced, CO2 could be catalytically activated and c... Through our newly-developed "chemical vapor deposition integrated process (ISVD-IP)'" using carbon OlOXlae (t..u2) as me raw matenal and only carbon source introduced, CO2 could be catalytically activated and converted to a new solid-form product, i.e., carbon nanotubes (CO2-derived) at a quite high yield (the single-pass carbon yield in the solid-form carbon-product produced from CO2 catalytic capture and conversion was more than 30% at a single-pass carbon-base). For comparison, when only pure carbon dioxide was introduced using the conventional CVD method without integrated process, no solid-form carbon-material product could be formed. In the addition of saturated steam at room temperature in the feed for CVD, there were much more end-opening carbon nano-tubes produced, at a slightly higher carbon yield. These inspiring works opened a remarkable and alternative new approach for carbon dioxide catalytic capture to solid-form product, comparing with that of CO2 sequestration (CCS) or CO2 mineralization (solidification), etc. As a result, there was much less body volume and almost no greenhouse effect for this solid-form carbon-material than those of primitive carbon dioxide. 展开更多
关键词 carbon dioxide catalytic capture (CDCC) carbon nanotubes (CNTs) chemical vapor deposition integrated process (CVD-IP) solid-formcarbon material debating greenhouse gases (GHG) effects
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RESEARCH ON LASER DIRECT DEPOSITION PROCESS OF Ti-6Al-4V ALLOY 被引量:2
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作者 S.Y. Gao Y.Z. Zhang +3 位作者 L.K. Shi B.L. Du M.Z. Xi H.Z. Ji 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2007年第3期171-180,共10页
Laser direct deposition (LDD) of metallic components is an advanced technology of combining CAD/CAM (computer aided design/computer aided manufacturing), high power laser, and rapid prototyping. This technology us... Laser direct deposition (LDD) of metallic components is an advanced technology of combining CAD/CAM (computer aided design/computer aided manufacturing), high power laser, and rapid prototyping. This technology uses laser beam to melt the powders fed coaxiaUy into the molten pool by the laser beam to fabricate fuUy dense metallic components. The present article mainly studies the LDD of Ti-6Al-4V alloy, which can be used to fabricate aircraft components. The mechanical properties of the Ti-6Al-4V alloy, fabricated by LDD, are obtained using the tension test, and the oxygen content of used powders and deposited specimens are measured. In the present article, it can be seen that the mechanical properties obtained using this method are higher than the ones obtained by casting, and equal to those got by wrought anneal. One aircraft part has been made using the LDD process. Because of this aircraft part, with sophisticated shape, the effect of the laser scanning track on the internal soundness of the deposited part was discussed. 展开更多
关键词 laser direct deposition Ti-6Al-4V alloy mechanical property depositing process aircraft component
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Preparation and Properties of CdTe Polycrystalline Films for Solar Cells 被引量:2
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作者 郑华靖 张静全 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2006年第3期65-68,共4页
The structure and characteristics of CdTe thin filrns are closely dependent on the whole deposition process in close-space sublimation (CSS). The physical mechanism of CSS was analyzed aud the temperature distributi... The structure and characteristics of CdTe thin filrns are closely dependent on the whole deposition process in close-space sublimation (CSS). The physical mechanism of CSS was analyzed aud the temperature distribution in CSS system was measured, and the influences of the increasing-temperature process and pressure on the preliminary nucleus creation were studied. The resuits indicate : tire samples deposited at different pressures hare a cubical structure of CdTe and the diffraction peaks of CdS and SnO2 : F. As the atmosphere pressure increases, the crystal size of CdTe decreases, the rate of the transparency of the thin film decreases and the absorption side moves towards the short-wave direction. After a 4-minute depositing process with a substrate teraw.rature of 500℃ and a source temperature of 620 ℃, the polycostallinc thin films can be mmade , so the production of high-quality integrated cell with StrO2: F/ CdS/ CdTe/ Au structure is hopeful. 展开更多
关键词 CdTe solar cell dose-spaced sublimation polycrystallinc thin film depositing process
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Structural, Optical and Electrical Properties of Li-doped ZnO Thin Films Influenced by Annealing Temperature 被引量:1
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作者 王冰 TANG Lidan +1 位作者 PENG Shujing WANG Jianzhong 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第5期873-876,共4页
Li-doped ZnO thin films had been grown by radio frequency magnetron sputtering and then annealed under various annealing temperatures. The characteristics of ZnO films were examined by XRD, FESEM, Hall measurement and... Li-doped ZnO thin films had been grown by radio frequency magnetron sputtering and then annealed under various annealing temperatures. The characteristics of ZnO films were examined by XRD, FESEM, Hall measurement and optical transmission spectra. Results showed that p type conduction was observed in Li doped ZnO films annealed at 500-600 ℃ and thep type ZnO films possessed a good crystalline with c-axis orientation, dense surface, and average transmission of about 85% in visible spectral region. 展开更多
关键词 doping defects physical vapor deposition processes OXIDES semiconducting Ⅱ-Ⅵmaterials heterojunction semiconductor devices
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Nano-scale gap filling and mechanism of deposit-etch-deposit process for phase-change material 被引量:1
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作者 任万春 刘波 +4 位作者 宋志棠 向阳辉 王宗涛 张北超 封松林 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第11期335-339,共5页
Ge2Sb2Te5 gap filling is one of the key processes for phase-change random access memory manufacture. Physical vapor deposition is the mainstream method of Ge2Sb2Te5 film deposition due to its advantages of film qualit... Ge2Sb2Te5 gap filling is one of the key processes for phase-change random access memory manufacture. Physical vapor deposition is the mainstream method of Ge2Sb2Te5 film deposition due to its advantages of film quality, purity, and accurate composition control. However,the conventional physical vapor deposition process cannot meet the gap- filling requirement with the critical device dimension scaling down to 90 nm or below. In this study, we find that the deposit-etch-deposit process shows better gap-filling capability and scalability than the single-step deposition process, especially at the nano-scale critical dimension. The gap-filling mechanism of the deposit-etch-deposit process was briefly discussed. We also find that re-deposition of phase-change material from via the sidewall to via the bottom by argon ion bombardment during the etch step was a key ingredient for the final good gap filling. We achieve void-free gap filling of phase-change material on the 45-nm via the two-cycle deposit-etch-deposit process. We gain a rather comprehensive insight into the mechanism of deposit-etch-deposit process and propose a potential gap-filling solution for over 45-nm technology nodes for phase-change random access memory. 展开更多
关键词 deposit-etch deposit process single step deposit gap filling RE-DEPOSITION
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MICRO ELECTRICAL DISCHARGE MACHINING DEPOSITION IN AIR 被引量:6
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作者 JIN Baidong ZHAO Wansheng WANG Zhenlong CAO Guohui 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第4期622-625,共4页
A new deposition method is described using micro electrical discharge machining (EDM) to deposit tool electrode material on workpiece in air. The basic principles of micro electrical discharge deposition (EDD) are... A new deposition method is described using micro electrical discharge machining (EDM) to deposit tool electrode material on workpiece in air. The basic principles of micro electrical discharge deposition (EDD) are analyzed and the realized conditions are predicted. With an ordinary EDM shaping machine, brass as the electrode, high-speed steel as the workpiece, a lot of experiments are carried out on micro EDD systematically and thoroughly. The effects of major processing parameters, such as the discharge current, discharge duration, pulse interval and working medium, are obtained, As a result, a micro cylinder with 0.19 mm in diameter and 7.35 mm in height is deposited. By exchanging the polarities of the electrode and workpiece the micro cylinder can be removed selectively. So the reversible machining of deposition and removal is achieved, which breaks through the constraint of traditional EDM. Measurements show that the deposited material is compact and close to workpiece base, whose components depend on the tool electrode, material. 展开更多
关键词 Electrical discharge machining(EDlVD Electrical discharge deposition(EDD) Reversible machining Processing pararneters
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PROTOTYPE SURFACE MICRO- PRECISION IN FUSED DEPOSITION MODELING PROCESS 被引量:2
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作者 WANG Tianming XI Juntong JIN Ye 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第1期100-106,共7页
To aim at prototype parts fabricated with fused deposition modeling (FDM) process, the problems how to improve and enhance their surface micro-precision are studied. The producing mechanism of surface roughness is e... To aim at prototype parts fabricated with fused deposition modeling (FDM) process, the problems how to improve and enhance their surface micro-precision are studied. The producing mechanism of surface roughness is explained with three aspects concretely including the principle error of rapid prototyping (RP) process, the inherent characteristics of FDM process, and some mi- cro-scratches on the surface of the extruded fiber. Based on the micro-characters of section shape of the FDM prototype, a physical model reflecting the outer shape characters is abstracted. With the physical simplified and deduced, the evaluating equations of surface roughness are acquired. According to the FDM sample parts with special design for experimental measurement, the real surface roughness values of different inclined planes are obtained. And the measuring values of surface roughness are compared with the calculation values. Furthermore, the causes of surface roughness deviation between measuring values and calculation values are respectively analyzed and studied. With the references of analytic conclusions, the measuring values of the experimental part surface are revised, and the revised values nearly accord with the calculation values. Based on the influencing principles of FDM process parameters and special post processing of FDM prototype parts, some concrete measures are proposed to reduce the surface roughness of FDM parts, and the applying effects are better. 展开更多
关键词 Rapid prototyping Fused deposition modeling Micro-precision Surface roughness Post processing sequence
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Controlling the electronic structure of SnO_2 nanowires by Mo-doping
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作者 罗志华 唐东升 +6 位作者 海阔 余芳 陈亚奇 何熊武 彭跃华 袁华军 羊亿 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第2期352-356,共5页
Mo-doped SnO2 (MTO) nanowires are synthesized by an in-situ doping chemical vapour deposition method. Raman scattering spectra indicate that the lattice symmetry of MTO nanowires lowers with the increase of Mo dopin... Mo-doped SnO2 (MTO) nanowires are synthesized by an in-situ doping chemical vapour deposition method. Raman scattering spectra indicate that the lattice symmetry of MTO nanowires lowers with the increase of Mo doping, which implies that Mo ions do enter into the lattice of SnO2 nanowire. Ultraviolet-visible diffuse reflectance spectra show that the band gap of MTO nanowires decreases with the increase of Mo concentration. The photoluminescence emission of SnO2 nanowires around 580~nm at room temperature can also be controlled accurately by Mo-doping, and it is extremely sensitive to Mo ions and will disappear when the atomic ratio reaches 0.46%. 展开更多
关键词 DOPING NANOSTRUCTURES chemical vapor deposition processes semiconducting materials
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Fabrication and characterization of Al–Mn superconducting films for applications in TES bolometers
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作者 Qing Yu Yi-Fei Zhang +6 位作者 Chang-Hao Zhao Kai-Yong He Ru-Tian Huang Yong-Cheng He Xin-Yu Wu Jian-She Liu Wei Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第7期503-506,共4页
Superconducting transition edge sensor(TES)bolometers require superconducting films to have controllable transition temperatures T_(c)in different practical applications.The value of T_(c)strongly affects thermal cond... Superconducting transition edge sensor(TES)bolometers require superconducting films to have controllable transition temperatures T_(c)in different practical applications.The value of T_(c)strongly affects thermal conductivity and thermal noise performance of TES detectors.Al films doped with Mn(Al-Mn)of different concentrations can accomplish tunable T_(c)A magnetron sputtering machine is used to deposit the Al-Mn films in this study.Fabrication parameters including sputtering pressure and annealing process are studied and their influences on T_(c)and superconducting transition widthΔT_(c)are optimized.The Al-Mn films withΔT_(c)below 1.0 mK for T_(c)in a range of 520 mK-580 mK are successfully fabricated. 展开更多
关键词 Al–Mn superconducting films deposition process annealing process superconducting transition edge sensor
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Structural and optical properties of AlN sputtering deposited on sapphire substrates with various orientations
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作者 Xianchun Peng Jie Sun +8 位作者 Huan Liu Liang Li Qikun Wang Liang Wu Wei Guo Fanping Meng Li Chen Feng Huang Jichun Ye 《Journal of Semiconductors》 EI CAS CSCD 2022年第2期59-65,共7页
AlN thin films were deposited on c-,a-and r-plane sapphire substrates by the magnetron sputtering technique.The in-fluence of high-temperature thermal annealing(HTTA)on the structural,optical properties as well as sur... AlN thin films were deposited on c-,a-and r-plane sapphire substrates by the magnetron sputtering technique.The in-fluence of high-temperature thermal annealing(HTTA)on the structural,optical properties as well as surface stoichiometry were comprehensively investigated.The significant narrowing of the(0002)diffraction peak to as low as 68 arcsec of AlN after HTTA implies a reduction of tilt component inside the AlN thin films,and consequently much-reduced dislocation densities.This is also supported by the appearance of E2(high)Raman peak and better Al-N stoichiometry after HTTA.Furthermore,the in-creased absorption edge after HTTA suggests a reduction of point defects acting as the absorption centers.It is concluded that HTTA is a universal post-treatment technique in improving the crystalline quality of sputtered AlN regardless of sapphire orienta-tion. 展开更多
关键词 nitrides physical vapor deposition processes semiconducting III-V materials DEFECTS
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Application of Optical Coatings in Automotive Industry
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作者 DU Yuan-dong ZHONG Di-sheng 《Semiconductor Photonics and Technology》 CAS 2005年第3期196-202,共7页
From a production viewpoint , the optical thin films used to transparent substrates such as window glass for automobiles and the coating treatment process are reviewed. The state of the ar t of the technologies, and t... From a production viewpoint , the optical thin films used to transparent substrates such as window glass for automobiles and the coating treatment process are reviewed. The state of the ar t of the technologies, and the problems to be solved and possible solutions ar e discussed. Market trends are forecasted. 展开更多
关键词 Optical coatings Water repellency Ultraviolet absorption Mechanical durability Deposition process
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