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Interplay between the atomic structures and superconductivity of two-monolayer Pb films
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作者 Kun Xie Ze Huang +9 位作者 Pengju Li Yumin Xia Desheng Cai Yitong Gu Yuzhou Liu Fangliang Cai Runxiao Zhang Haohao Shi Ping Cui Shengyong Qin 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2024年第1期90-98,共9页
Superconductors with reduced dimensionality have been widely explored for their exotic superconducting behaviors.Especially,at the two-dimensional limit,two-monolayer Pb films with two types of structures provide an i... Superconductors with reduced dimensionality have been widely explored for their exotic superconducting behaviors.Especially,at the two-dimensional limit,two-monolayer Pb films with two types of structures provide an ideal platform to unveil the underlying superconducting mechanism[Science 324,1314(2009)].Here,by combining scanning tunneling microscopy(STM)with the first-principle calculations,we successfully identify that these two types have different atomic lattice structures with varying stacking phases,which further enables us to calculate the phonon spectrum and electron phonon coupling strength of each type.The theoretical calculations are in good agreement with tunneling spectroscopy measurements of the superconducting transition temperatures(T_(c)),which established a correlation between atomic structures and superconductivity.Moreover,it was observed that the higher T_(c)of these two types also possess higher out-of-plane upper critical magnetic fields(Hc2).These findings will provide important new insights into two-dimensional superconductivity at the atomic level. 展开更多
关键词 2 ML pb films SUPERCONDUCTIVITY atomic structure scanning tunneling microscopy first-principle calculations
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锌电积用Pb-Ag阳极MnO_(2)镀膜的电化学性能 被引量:1
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作者 王恩泽 郭孟伟 +3 位作者 邵伟春 高明远 徐存英 张启波 《中国有色金属学报》 EI CAS CSCD 北大核心 2024年第2期490-502,共13页
锌电积用Pb-Ag阳极存在析氧过电位高、表面铅易电化学氧化溶解,造成阴极电锌品质低等突出问题,如何减少阳极的溶铅污染并提升其催化析氧活性、降低反应能耗,成为亟待解决的难题。本文在Pb-Ag阳极表面电沉积一层均匀、致密的MnO_(2)薄膜... 锌电积用Pb-Ag阳极存在析氧过电位高、表面铅易电化学氧化溶解,造成阴极电锌品质低等突出问题,如何减少阳极的溶铅污染并提升其催化析氧活性、降低反应能耗,成为亟待解决的难题。本文在Pb-Ag阳极表面电沉积一层均匀、致密的MnO_(2)薄膜,采用SEM、XRD和ICP等对MnO_(2)催化层的表面微观形貌、晶体结构和溶液含铅量进行分析;采用CV、LSV、EIS和Tafel等对Pb-Ag/MnO_(2)阳极的析氧催化活性和耐腐蚀性能进行分析。结果表明:在MnSO_(4)-H_(2)SO_(4)溶液中,当循环速率为200 mL/min、温度为80℃时,以4 mA/cm^(2)电沉积120 min制备的Pb-Ag/MnO_(2)镀膜电极具有最佳的催化析氧和耐蚀性能;PbAg阳极经优化镀膜后,50 mA/cm^(2)时其析氧过电位由936 mV降低为648 mV,腐蚀电流密度由7.03μA/cm^(2)降低至0.66μA/cm^(2);相较于Pb-Ag阳极,基于Pb-Ag/MnO_(2)阳极的15 d长周期电锌体系中溶铅量由0.61 mg/L降至0.29 mg/L。 展开更多
关键词 锌电积 pb-Ag阳极 MnO_(2)镀膜 催化析氧 耐蚀性能
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Effects of atomic corrugations on electronic structures in Pb_(1-x)Bi_(x) thin films
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作者 李鹏举 谢鹍 +2 位作者 夏玉敏 蔡德胜 秦胜勇 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第6期391-394,共4页
We carried out experimental investigations of the geometric effect on the electronic behavior in Pb_(1-x)Bi_(x) thin films by scanning tunneling microscopy and spectroscopy.Single crystal monolayer Pb_(0.74)Bi_(0.26) ... We carried out experimental investigations of the geometric effect on the electronic behavior in Pb_(1-x)Bi_(x) thin films by scanning tunneling microscopy and spectroscopy.Single crystal monolayer Pb_(0.74)Bi_(0.26) and two-monolayer Pb_(0.75)Bi_(0.25)Pb_(1-x)Bi_(x) thin films were fabricated by molecular beam epitaxy,where large surface corrugations were observed.Combined with tunneling spectroscopic measurements,it is found that atomic corrugations can widely change the electronic behaviors.These findings show that the Pb_(1-x)Bi_(x) system can be a promising platform to further explore geometry-decorated electronic behavior in two-dimensional metallic thin films. 展开更多
关键词 electronic contribution geometric corrugation scanning tunneling microscopy pb–Bi alloy films
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Collective excitations and quantum size effects on the surfaces of Pb(111)films:An experimental study
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作者 Yade Wang Zijian Lin +4 位作者 Siwei Xue Jiade Li Yi Li Xuetao Zhu Jiandong Guo 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第7期74-82,共9页
Pb(111)film is a special system that exhibits strong quantum size effects in many electronic properties.The collective excitations,i.e.,plasmons,in Pb(111)films are also expected to show signatures of the quantum size... Pb(111)film is a special system that exhibits strong quantum size effects in many electronic properties.The collective excitations,i.e.,plasmons,in Pb(111)films are also expected to show signatures of the quantum size effect.Here,using high-resolution electron energy loss spectroscopy,we measured the plasmons on the surface of Pb(111)films with different film thicknesses and analyzed the plasmon dispersions.One surface plasmon branch exhibits prominent damping in the small momentum range,which can be attributed to the interaction between the top and bottom interfaces of the Pb(111)films.With the film thickness increasing,the critical momentum characterizing the damping in Pb(111)films decays not only much slower in Pb(111)films than in other metal films,and even in films with the thickness up to 40 monolayers the damping still exists.The slow decay of the surface plasmon damping,manifesting the strong quantum size effect in Pb(111)films,might be related to the strong nesting of the Fermi surface along the(111)direction. 展开更多
关键词 pb films PLASMONS quantum size effects high-resolution electron energy loss spectroscopy
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Influence of Annealing Time on the Microstructure and Properties of Pb(Zr_(0.53)Ti_(0.47))O_3 Thin Films 被引量:1
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作者 HUANG Ling MAO Wei +2 位作者 HUANG Zhixiong SHI Minxian MEI Qinlin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第1期88-91,共4页
The PZT thin films were prepared on (111)- Pt/Ti/SiO2/Si substrates by sol-gel method, and lead acetate [Pb(CH3COO)2], zirconium nitrate [Zr(NO3)4] were used as raw materials. The X-ray diffractometer (XRD) an... The PZT thin films were prepared on (111)- Pt/Ti/SiO2/Si substrates by sol-gel method, and lead acetate [Pb(CH3COO)2], zirconium nitrate [Zr(NO3)4] were used as raw materials. The X-ray diffractometer (XRD) and scanning electron microscopy (SEM) were used to characterize the phase structure and surface morphology of the films annealed at 650 ~C but with different holding time. Ferroelectric and dielectric properties of the films were measured by the ferroelectric tester and the precision impedance analyzer, respectively. The PZT thin films were constructed with epoxy resin as a composite structure, and the damping properties of the composite were tested by dynamic mechanical analyzer (DMA). The results show that the films annealed for 90 minutes present a dense and compact crystal arrangement on the surface; moreover, the films also achieve their best electric quality. At the same time, the largest damping loss factor of the composite constructed with the 90 mins-annealed film shows peak value of 0.9, hi^her than the pure epoxy resin. 展开更多
关键词 sol-gel method pb(Zr0.53Ti0.47)O3 thin film surface feature ferroelectric and dielectricproperty damping property
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Lattice Effect on Magnetic and Electrical Properties of Ln_(2/3)Pb_(1/3)MnO_3(Ln=La,Pr,Nd)Films 被引量:2
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作者 Li'an HAN Huaping YANG Yongjun HE 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2008年第5期709-711,共3页
Lattice effect on magnetic and electrical transport properties of Ln2/3Pb1/3MnO3 (Ln=La, Pr, Nd) films prepared by RF magnetron sputtering technique were investigated. With the decrease of the average ions radius ... Lattice effect on magnetic and electrical transport properties of Ln2/3Pb1/3MnO3 (Ln=La, Pr, Nd) films prepared by RF magnetron sputtering technique were investigated. With the decrease of the average ions radius 〈rA〉, the structure of Ln2/3Pb1/3MnO3 (Ln=La, Pr, Nd) targets transit from the rhombohedral phase to the orthorhombic phase, and the Curie temperature reduces rapidly with the decrease of 〈rA〉. The electrical properties show that films are the metallic state which can be fitted to the formula: ρ(T)=ρ0 + ρ1T^2 + ρ2T^4.5 at low temperatures. The temperature range of the ferromagnetic metallic state becomes narrow with the decrease of 〈rA〉. The phenomenon can be explained by the lattice effect. 展开更多
关键词 Lattice effect Ln2/3pb1/3MnO3 films Electrical properties
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STUDY ON PHOTOCATALYTIC MECHANISM OF SOL-GEL-DERIVED Pb-DOPED TiO_2 THIN FILMS 被引量:2
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作者 YU Jiaguo ZHAO Qingnan ZHAO Xiujian Wuhan University of Technology 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1999年第4期1-8,共8页
Pb-doped TiO2 photocatalytic thin films were prepared on a soda-lime glass substrate via sol-gel method using TiO2 sol solution containing lead and characterized by X-ray photoelectron spectroscopy (XPS). The results ... Pb-doped TiO2 photocatalytic thin films were prepared on a soda-lime glass substrate via sol-gel method using TiO2 sol solution containing lead and characterized by X-ray photoelectron spectroscopy (XPS). The results showed that besides oxides of Ti(IV) there is a certain amount of oxides of To(?) and Ti(?) and Pb exists in the forms of PbTiO3 and PbO. The photocatalytic activity of the Pb-doped TiO2 films was evaluated by the photocatalytic decolorization of aqueous methyl orange and photocatalytic mechanism mas also analyzed. 展开更多
关键词 sol-gel method pb-doped TiO2 thin films XPS photocatalytK mechanism
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Crystallization and Electrical Properties of (Ba_(0.4)Pb_(0.3))Sr_(0.3)TiO_3 Thin Film by Pulsed Laser Deposition
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作者 杨卫明 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第4期634-637,共4页
(Ba0.4Pb0.3)Sr0.3TiO3 thin films were fabricated via pulsed laser deposition (PLD) technique on Pt/TiO2/SiO2/Si substrate. The crystallization of the films was characterized by XRD and FSEM, and the experimental r... (Ba0.4Pb0.3)Sr0.3TiO3 thin films were fabricated via pulsed laser deposition (PLD) technique on Pt/TiO2/SiO2/Si substrate. The crystallization of the films was characterized by XRD and FSEM, and the experimental results suggested deposition parameters, especially the deposition temperature was the key factor in forming the perovskite structure. The dielectric properties of the film deposited with optimized parameters were studied by an Agilent 4294A impedance analyzer at 1 MHz. The dielectric constant was 772, and the loss tangent was 0.006. In addition, the well-shaped hysteresis loop also showed that the film had a well performance in ferroelectric. The saturated polarization P, remnant polarization Pr and coercive field E were about 4.6 μC/cm2, 2.5 μC/cm2 and 23 kV/cm (the coercive voltage is 0.7 V), respectively. It is suggested the film should be a promising candidate for microwave applications and nonvolatile ferroelectric random access memories (NvFeRAMs). 展开更多
关键词 (Ba0.4pb0.3)Sr0.3TiO3 thin film PLD dielectric properties ferroelectric properties
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Preparation of Nano-Particles (Pb,La)TiO_3 Thin Films by Liquid Source Misted Chemical Deposition
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作者 张之圣 曾建平 李小图 《Transactions of Tianjin University》 EI CAS 2004年第1期59-62,共4页
Nano particles lanthanum modified lead titanate (PLT) thin films are grown on Pt/Ti/SiO 2/Si substrate by liquid source misted chemical deposition (LSMCD). PLT films are deposited for 4-8 times, and then annealed at v... Nano particles lanthanum modified lead titanate (PLT) thin films are grown on Pt/Ti/SiO 2/Si substrate by liquid source misted chemical deposition (LSMCD). PLT films are deposited for 4-8 times, and then annealed at various temperature. XRD and SEM show that the prepared films have good crystallization behavior and perovskite structure. The crystallite is about 60 nm. The deposition speed is 3 nm/min. This deposition method can exactly control stoichiometry ratios, doping concentration ratio and thickness of PLT thin films. The best annealing process is to bake at 300 ℃ for 10 min and anneal at 600 ℃ for 1 h. 展开更多
关键词 liquid source misted chemical deposition (LSMCD) nano particle (pb La)TiO 3 thin films XRD SEM
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Regeneration of Q-State PbS Particles in Langmuir-Blodgett Films
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作者 WU Yu-qing XU Wei-qing +2 位作者 ZHAO Bing TAO Yan-chun WU Ying and LI Bo-fu(Key Laboratory for Supramolecular Structure and Spectroscopy,Jilin University,Changchun,130023) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1996年第4期374-377,共4页
The regeneration procedure of Q-state PbS particles in lead arachidate(PbAr)Langmuir-Blodgett films have been studied by means of UV-vis absorption, FT-IR spectra and quartz crystal microbalance(QCM) measurements.The ... The regeneration procedure of Q-state PbS particles in lead arachidate(PbAr)Langmuir-Blodgett films have been studied by means of UV-vis absorption, FT-IR spectra and quartz crystal microbalance(QCM) measurements.The results showed that the mole fraction of PbS particles in LB films was increased by immersing PbScontaining ArH LB films in a Pb ̄(2+) buffer solution,followed by being reexposed to H_2S gas. 展开更多
关键词 s:Q-state pbS particle Lead arachidate LB film UV-VIS FT-IR QCM.
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薄膜厚度对Pb,La(Zr,Ti)O_(3)铁电薄膜基自供电紫外光电探测器性能影响研究
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作者 张清风 陈松 《黄河科技学院学报》 2023年第5期6-14,共9页
目前半导体基自供电紫外光电探测器由于光生电子和空穴不能有效分离,因此灵敏度较低。铁电体具有宽的光学带隙(>3 eV)和大的退极化场,因此被认为是研制高性能自供电紫外光电探测器的重要候选材料。基于此,采用溶胶-凝胶法制备了层数... 目前半导体基自供电紫外光电探测器由于光生电子和空穴不能有效分离,因此灵敏度较低。铁电体具有宽的光学带隙(>3 eV)和大的退极化场,因此被认为是研制高性能自供电紫外光电探测器的重要候选材料。基于此,采用溶胶-凝胶法制备了层数不同的Pb_(0.93) La_(0.07)(Zr_(0.2) Ti_(0.8))_(0.985)O_(3)(PLZT)铁电薄膜并研制出了基于Au/PLZT/FTO垂直结构的自供电紫外光电探测器。研究结果表明:通过合理调整极化电压的方向,极化电压能对光电响应性起到加强作用。在+2 V极化电压下,旋涂层数为3层(厚度约为140 nm)的Au/PLZT/FTO光电探测器拥有最佳的自供电紫外光电响应,高的光/暗电流比为3750、大的响应度为13.1 mA/W、高的探测率为4.11×10^(11) Jones以及快的响应速度为20 ms/30 ms。 展开更多
关键词 铁电薄膜 pb La(Zr Ti)O_(3) 厚度 极化电压 自供电紫外光电探测器
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The surface morphologies of (Pb,Sr)TiO_3 thin film fabricated on Si-buffered Pt/Ti/SiO_2/Si substrate
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作者 李弢 古宏伟 《广东有色金属学报》 2005年第2期310-313,共4页
(Pb,Sr)TiO3 (PST) thin film are fabricated by RF magnetron sputtering on Si-buffered Pt/Ti/SiO2/Si substrates with different buffer layer deposition time. Surface morphologies of the buffer layer indicate an improvi... (Pb,Sr)TiO3 (PST) thin film are fabricated by RF magnetron sputtering on Si-buffered Pt/Ti/SiO2/Si substrates with different buffer layer deposition time. Surface morphologies of the buffer layer indicate an improving surface roughness and larger grains with the prolongation of sputtering time. Deposition of PST thin films shows excellent surface fluctuation filling ability to improve the surface roughness of substrates. PST surface morphologies exhibit apparently different grain forms according to the preparation time durance of buffer layer. 展开更多
关键词 薄膜 微电子装置 溶胶-凝胶法
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BPSCCO Superconducting Films Grown by Spray Pyrolysis Technique: Systematic Study of the Relationship between Pb Content and Annealing Conditions
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作者 Y Elvia Díaz Valdés Concepción Mejía García +1 位作者 Ana María Paniagua Mercado Arturo Méndez Sánchez 《Advances in Materials Physics and Chemistry》 2012年第4期92-95,共4页
Actually recent investigation in developing semiconducting-superconducting composites based in CdS and Bi-based superconductors has attracted interest in processing thin superconducting films. In this work are reporte... Actually recent investigation in developing semiconducting-superconducting composites based in CdS and Bi-based superconductors has attracted interest in processing thin superconducting films. In this work are reported Bi-Pb-Sr-Ca-Cu-O (BPSCCO) thin films grown on MgO substrates by spray pyrolysis technique from a solution containing Bi(NO3)3, Pb(NO3)2, Sr(NO3)2, Ca(NO3)2 and Cu(NO3)2, with a subsequent solid state reaction for growing the Bi-based superconducting phases. Annealed films were characterized by X-ray diffraction, atomic absorption spectroscopy and resistance measurements. Interdependence between Pb content, annealing time and temperature, in the formation of superconducting phases was studied applying a fractional factorial design 3III4-2. Interrelation between Pb content, ta and Ta exists. The presence of Pb is necessary to stabilize the high-Tc phase but its content depends on the annealing conditions. 展开更多
关键词 SUPERCONDUCTIVITY BPSCCO SUPERCONDUCTING films Spray PYROLYSIS Deposition pb CONTENT Annealing Conditions Experimental Design
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Al基体表面熔盐化学法镀Pb工艺 被引量:4
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作者 蒋良兴 郝科涛 +5 位作者 吕晓军 赖延清 洪波 李渊 李劼 刘业翔 《中国有色金属学报》 EI CAS CSCD 北大核心 2011年第8期1997-2002,共6页
采用熔盐化学法在Al基体表面直接镀制Pb及其合金,并对其工艺条件进行优化。结果表明:熔体过热度对镀层与基体结合力的影响程度较基体浸入时间的大。随着过热度的升高,结合强度先迅速增大,在60℃之后变化不明显。在熔盐过热度为60℃,基... 采用熔盐化学法在Al基体表面直接镀制Pb及其合金,并对其工艺条件进行优化。结果表明:熔体过热度对镀层与基体结合力的影响程度较基体浸入时间的大。随着过热度的升高,结合强度先迅速增大,在60℃之后变化不明显。在熔盐过热度为60℃,基体浸入时间2.5 min时,镀层与基体具有较好的结合强度(0.76 MPa)。往熔盐中加入适量的辅盐SnCl2可以促进Pb-Al-Sn三元合金的形成,并将镀层与基体的结合强度提高到2.1 MPa以上。在化学镀之后增加金属浴工序,可修补镀层在化学镀工序中形成的孔洞,在Al表面获得致密无孔、成分可调的Pb基合金镀层。 展开更多
关键词 熔盐 化学镀 Al基体 pb镀层 结合强度 金属浴
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Pb掺杂TiO_2薄膜的制备及光催化活性研究 被引量:38
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作者 赵秀峰 孟宪锋 +2 位作者 张志红 刘浪 贾殿赠 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2004年第1期140-146,共7页
以硝酸铅和钛酸丁酯[Ti(OBt)4]为前驱体,用溶胶-凝胶法在活性炭表面制成了Pb掺杂TiO2薄膜.并用X射线衍射(XRD)、紫外可见光谱(UV-VIS)、透射电镜(TEM)对制得的Pb掺杂TiO2薄膜进行了表征.分别用甲基橙水溶液的光催化脱色反应、有机磷农... 以硝酸铅和钛酸丁酯[Ti(OBt)4]为前驱体,用溶胶-凝胶法在活性炭表面制成了Pb掺杂TiO2薄膜.并用X射线衍射(XRD)、紫外可见光谱(UV-VIS)、透射电镜(TEM)对制得的Pb掺杂TiO2薄膜进行了表征.分别用甲基橙水溶液的光催化脱色反应、有机磷农药一氧化乐果(omethoate)水溶液的光催化降解反应评价了不同Pb掺杂TiO2薄膜的光催化活性.结果表明,薄膜为金红石和锐钛矿的混合晶相.相对于未掺杂的TiO2薄膜,由于金红石含量的增加,不同Pb掺杂TiO2薄膜的吸收带发生了微小的红移.Pb掺杂使薄膜的光催化活性明显提高,当Pb/TiO2质量分数为1.7%时,薄膜显示出最高的光催化活性. TiO2薄膜中的Pb可能以Pb(Ⅳ)和Pb(Ⅱ)两种形态存在,在紫外光的辐射下,Pb(Ⅳ)和Pb(Ⅱ)可能通过浅势俘获TiO2的光生电子和空穴而发生相互转化,减少了光生电子和空穴的简单复合,从而提高了薄膜的光催化活性. 展开更多
关键词 pb掺杂 TIO2薄膜 溶胶—凝胶法 制备 光催化活性
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阳极Pb(Ⅱ)氧化物膜的阴极还原 被引量:8
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作者 柳厚田 梁海河 +2 位作者 杨炯 杨春晓 周伟舫 《化学学报》 SCIE CAS CSCD 北大核心 2002年第3期427-431,共5页
采用X射线衍射、光电流谱、线性电位扫描和开路电位衰退等方法研究了Pb电极在 0 .9V(vs.Hg/Hg2 SO4 ) ,4.5mol/LH2 SO4 溶液中生长 2h所得的阳极Pb(Ⅱ )氧化物膜的阴极还原行为 .实验结果表明 :阳极Pb(Ⅱ )氧化物膜主要由PbO微粒和PbO&#... 采用X射线衍射、光电流谱、线性电位扫描和开路电位衰退等方法研究了Pb电极在 0 .9V(vs.Hg/Hg2 SO4 ) ,4.5mol/LH2 SO4 溶液中生长 2h所得的阳极Pb(Ⅱ )氧化物膜的阴极还原行为 .实验结果表明 :阳极Pb(Ⅱ )氧化物膜主要由PbO微粒和PbO·PbSO4 微粒组成 ,微粒间液膜可供离子输运 ;在LSV负向扫描过程中 ,阳极Pb(Ⅱ )氧化物膜是按溶解 -沉积机理还原的 ,首先PbO微粒表层借助该微粒间的液膜还原为金属铅 ,而待PbO微粒表面层转化的金属铅与PbO·PbSO4 微粒接触后 ,则PbO·PbSO4 就和PbO一起还原 ,而以PbO·PbSO4 的还原进程略快 . 展开更多
关键词 pb(Ⅱ)氧化物膜 阴极还原 铅电极 光电流谱法 溶解-沉积机理 正极板栅 铅酸蓄电池
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铈降低在硫酸溶液中生长的阳极Pb(Ⅱ)氧化物膜的电阻的研究 被引量:27
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作者 柳厚田 张新华 +2 位作者 杨炯 杨春晓 周伟舫 《化学学报》 SCIE CAS CSCD 北大核心 2002年第4期643-646,共4页
应用电化学阻抗频谱法、线性电位扫描法和光电流技术研究了在 4.5mol·dm-3 H2 SO4 溶液中Pb 1%(at.)Ce(简称Pb 1Ce)合金在 0 .9V (vs .Hg/Hg2 SO4 电极 )生长的阳极Pb(Ⅱ )氧化物膜的电阻较纯铅的低的原因 .实验结果表明 ,Ce阻抑阳... 应用电化学阻抗频谱法、线性电位扫描法和光电流技术研究了在 4.5mol·dm-3 H2 SO4 溶液中Pb 1%(at.)Ce(简称Pb 1Ce)合金在 0 .9V (vs .Hg/Hg2 SO4 电极 )生长的阳极Pb(Ⅱ )氧化物膜的电阻较纯铅的低的原因 .实验结果表明 ,Ce阻抑阳极Pb(Ⅱ )氧化物膜的生长并增加其孔率 ,从而降低其电阻 . 展开更多
关键词 铅铈合金 阳极pb(Ⅱ)氧化物膜 电阻 电化学阻抗频谱法 线性电位扫描法 光电流技术 铅酸蓄电池 正极栅板 腐蚀
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紫外激光脉冲沉积法制备高温超导(Bi,Pb)_2Sr_2CaCu_2O_8薄膜的研究 被引量:3
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作者 张辉 何恩全 +2 位作者 杨宁 张鹏翔 阮耀钟 《功能材料》 EI CAS CSCD 北大核心 2013年第11期1642-1645,1650,共5页
用紫外脉冲激光沉积技术在单晶衬底上制备高温超导(Bi,Pb)2Sr2CaCu2O8薄膜,系统研究了不同镀膜参数对薄膜结晶质量的影响,获得了优化的镀膜工艺。并在较低温沉积、高温退火,以及高温沉积两种工艺下均获得了具有c轴取向、无杂相及无挥发... 用紫外脉冲激光沉积技术在单晶衬底上制备高温超导(Bi,Pb)2Sr2CaCu2O8薄膜,系统研究了不同镀膜参数对薄膜结晶质量的影响,获得了优化的镀膜工艺。并在较低温沉积、高温退火,以及高温沉积两种工艺下均获得了具有c轴取向、无杂相及无挥发(分解)的(Bi,Pb)2Sr2CaCu2O8薄膜。相比于高温沉积,低温沉积、高温退火制备的薄膜结晶质量更好。 展开更多
关键词 (Bi pb)2Sr2CaCu2O8薄膜 紫外脉冲激光沉积技术 X射线衍射
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电活性NiHCF薄膜在含Pb^(2+)溶液中的离子交换性能 被引量:4
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作者 肖俊强 郝晓刚 +2 位作者 王忠德 张忠林 刘世斌 《中国有色金属学报》 EI CAS CSCD 北大核心 2010年第9期1802-1808,共7页
采用阴极电沉积方法制备电活性NiHCF薄膜,考察薄膜在含Pb2+溶液中的电控离子交换性能。在0.1mol/L的Pb(NO3)2溶液中,通过循环伏安法调节膜电极的氧化还原电位考察其活性和可逆性,并结合电化学石英晶体微天平(EQCM)技术分析离子的交换机... 采用阴极电沉积方法制备电活性NiHCF薄膜,考察薄膜在含Pb2+溶液中的电控离子交换性能。在0.1mol/L的Pb(NO3)2溶液中,通过循环伏安法调节膜电极的氧化还原电位考察其活性和可逆性,并结合电化学石英晶体微天平(EQCM)技术分析离子的交换机制,同时比较Co(NO3)2和Ni(NO3)2溶液中NiHCF膜电极的电化学行为;在0.1mol/L[Pb(NO3)2+Co(NO3)2]和0.1mol/L[Pb(NO3)2+Ni(NO3)2]两组混合溶液中,通过循环伏安法分析薄膜对Pb2+/Co2+和Pb2+/Ni2+的选择性;并通过X射线能谱仪(EDS)分别测定膜在氧化和还原状态下的元素组成。结果表明,电活性NiHCF膜在含Pb2+、Co2+和Ni2+溶液中均具有可逆的离子交换行为,对Pb2+的选择性高于对Co2+和Ni2+的,通过电控离子交换方法可以使Pb2+从废水中得到有效分离。 展开更多
关键词 NiHCF薄膜 铅(II)分离 离子交换 电化学石英晶体微天平
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pH值对电沉积PbS薄膜结构和性能的影响 被引量:2
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作者 韩文 曹丽云 黄剑锋 《人工晶体学报》 EI CAS CSCD 北大核心 2009年第1期60-63,共4页
采用阴极恒电压法在ITO导电玻璃表面沉积了PbS薄膜,并用X射线衍射仪(XRD)、原子力显微镜(AFM)以及傅立叶变换红外光谱仪(FT-IR)对薄膜的结构和光学性能进行了表征,研究了沉积液pH值对薄膜的相组成、显微形貌以及光学性质的影响。结果表... 采用阴极恒电压法在ITO导电玻璃表面沉积了PbS薄膜,并用X射线衍射仪(XRD)、原子力显微镜(AFM)以及傅立叶变换红外光谱仪(FT-IR)对薄膜的结构和光学性能进行了表征,研究了沉积液pH值对薄膜的相组成、显微形貌以及光学性质的影响。结果表明:在U=3 V,pH=2.4,沉积时间为20 min,加入EDTA作络合剂的情况下,可制备出沿(111)和(200)晶面取向生长的立方相PbS薄膜。薄膜均匀而致密,随pH值增加,薄膜的压应力及禁带宽度呈现先减小后增大的变化趋势。所制备的微晶PbS薄膜的禁带宽度约为0.38~0.39 eV。 展开更多
关键词 pbS薄膜 电沉积 PH值 光学性能
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