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Photocatalytic Activity of TiO_(2) Coatings Fabricated on Al_(2)O_(3) by Mechanical Coating Technique 被引量:4
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作者 WU Kaixia ZHA Wusheng CHEN Xiuli 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第1期1-5,共5页
The titanium coatings were prepared on Al_(2)O_(3) balls by mechanical coating technique (MCT),and then the coatings were oxidized to titanium oxides(TiO_(2)) films at 300-600 ℃.The effects of different milling time ... The titanium coatings were prepared on Al_(2)O_(3) balls by mechanical coating technique (MCT),and then the coatings were oxidized to titanium oxides(TiO_(2)) films at 300-600 ℃.The effects of different milling time and oxidation temperature on thickness of films were studied.The composition and microstructure of the films were analyzed by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS).The results show that the thickest coatings with an average thickness of 20 μm were obtained at the milling time of 15 h.In addition,with the increase of the oxidation temperature,the oxidation of the film is increased.When the milling time is 15 h,the oxidation temperature is 500 ℃,and the addition of photocatalyst is 1 g/mL.The films have the best photocatalytic performance when the degradation rate of methyl orange solution reaches the maximum value of 74.9 %,and the films have a good reusability. 展开更多
关键词 mechanical coating technique photocatalytic activity TiO_(2) milling time oxidation temperature
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Structural and optical properties of nano-spin coated sol-gel porous TiO_2 films 被引量:1
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作者 M.M.El-NAHASS M.H.ALI A.El-DENGLAWEY 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期3003-3011,共9页
Three thicknesses of TiO2 films, 174, 195, and 229 nm, were deposited onto quartz substrates by sol–gel spin coating method. The as-deposited thin films were characterized by nano-crystallite with different sizes (19... Three thicknesses of TiO2 films, 174, 195, and 229 nm, were deposited onto quartz substrates by sol–gel spin coating method. The as-deposited thin films were characterized by nano-crystallite with different sizes (19–46 nm) and relatively high porous structure. Optical constants were determined and showed the lowest refractive index of 1.66 for the as-prepared films that ever reported till now. Obtained results were discussed through current theoretical ideas. 展开更多
关键词 TiO2 films optical properties NANOSTRUCTURE electron microscopy thin films spin coating technique
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Coating Protection for Production Facilities of Offshore Oil Fields
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作者 Zhu, Chengde 《China Ocean Engineering》 SCIE EI 1993年第4期467-474,共8页
This paper describes coating protection of production facilities of offshore oil fields based on the practice of development of Bohai Offshore Oil Field, with focus laid on the selection of coating systems, surface pr... This paper describes coating protection of production facilities of offshore oil fields based on the practice of development of Bohai Offshore Oil Field, with focus laid on the selection of coating systems, surface preparation, coating application, as well as coating inspection for four types of major production facilities. 展开更多
关键词 coating techniques CORROSION INSPECTION Ocean engineering Offshore structures Oil field equipment PAINT Protective coatings Surface treatment
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Effect of Spin Coating Speed on Some Optical Properties of ZnO Thin Films
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作者 David Adegboyega Ajadi Saint Muyiwa Agboola Oluwaseun Adedokun 《Journal of Materials Science and Chemical Engineering》 2016年第5期1-6,共6页
This paper reports the synthesis and characterization of ZnO thin films prepared by sol-gel spin coating technique. The sol-gel was prepared from zinc acetate dehydrate as a precursor, 2-me- thoxyethanol as a solvent ... This paper reports the synthesis and characterization of ZnO thin films prepared by sol-gel spin coating technique. The sol-gel was prepared from zinc acetate dehydrate as a precursor, 2-me- thoxyethanol as a solvent and di-ethanolamine as a stabilizer, and then deposited on glass substrate using spin coater at the coating speed of 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, 5000 rpm and 6000 rpm. After pre-heated at 150℃, the samples were post-heated at 250oC and also annealed at 400℃. X-ray diffraction (XRD) of the films showed polycrystalline hexagonal structure, with (002) orientation as most intense peak having a grain size of 28.1 nm. The absorbance of the film decreases with increasing wavelength and the transmittance was generally high between visible regions from 280 nm - 1200 nm. The ZnO films deposited at a spinning speed of 2000 rpm had highest transmittance of 88% in the visible region from 280 nm - 1200 nm. The energy band gap was found to be in the range of 3.23 - 3.40 eV. The thicknesses of the films decreased with increase in coating speed. Based on these results, ZnO thin films obtained could have useful application in transparent conducting oxide electrode in solar cells. 展开更多
关键词 Sol-Gel Spin coating technique ANNEALING Grain Size XRD Energy Band Gap
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离子束溅射沉积羟基磷灰石涂层钛种植体材料的制备和表征 被引量:4
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作者 王昌祥 陈治清 +5 位作者 邱静 管利民 刘仲阳 王培录 郑思孝 廖小东 《功能材料》 EI CAS CSCD 北大核心 1999年第4期438-440,共3页
采用Ar+离子束溅射沉积技术在钛基体上沉积羟基磷灰石薄膜涂层,Ar+离子束的能量分别为0.9keV、1.2keV和1.5keV。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和红外光谱(FTIR)等... 采用Ar+离子束溅射沉积技术在钛基体上沉积羟基磷灰石薄膜涂层,Ar+离子束的能量分别为0.9keV、1.2keV和1.5keV。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和红外光谱(FTIR)等检测方法,对制备的羟基磷灰石薄膜涂层进行了表征。X射线衍射和透射电镜结果表明该薄膜涂层为非晶态;红外光谱中无羟基(OH-)特征峰存在,CO=3根吸收峰的出现说明制备过程中会引入CO=3根;扫描电镜观察结果显示出制备的羟基磷灰石薄膜涂层致密、均匀;划痕实验结果表明涂层与钛基体间的结合紧密。以上结果表明,离子束溅射沉积技术可以用于沉积羟基磷灰石薄膜涂层钛种植材料。 展开更多
关键词 羟基磷灰石涂层 钛种植体材料 制备 表征
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表面涂层的制备工艺与测试技术 被引量:3
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作者 杨玫 王立华 《武汉科技大学学报》 CAS 2003年第3期241-244,261,共5页
表面涂层技术能够改变材料及其制件表面成分和组织结构,获得性能优异的表面薄层,因而广泛应用于各行业。目前普遍采用的制备工艺是PVD和CVD技术。比较研究这两种技术及其改进方法,并分析膜厚检测、薄膜成分和结构以及力学性能等测试技术。
关键词 表面涂层 制备工艺 测试技术
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Study on optical compound films
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作者 ZHANGHW ROBERTCQ 《Semiconductor Photonics and Technology》 CAS 1995年第1期81-83,共3页
Using the compound materials and double e-gun evaporation,the compound optical films have been successfully deposited on K9 glass substrate.The refractive index of optical compund films deposited in diffeent parameter... Using the compound materials and double e-gun evaporation,the compound optical films have been successfully deposited on K9 glass substrate.The refractive index of optical compund films deposited in diffeent parameters have been measured and theoretical formula for calculation refractive index of compound films have been derived.It is shown that the experimental curve for the variation of refractive index with wavelength in 0.4 ̄1.4 μm region and the theoretical one agree very well.Using these films,the laser reflecting mirror has been successfully coated. 展开更多
关键词 Optical Films coating techniques Vacuum Deposition
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Hydrogen Detection With FBG Sensor Technology for Disaster Prevention 被引量:5
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作者 Said SAAD Lotfi HASSINE 《Photonic Sensors》 SCIE EI CAS 2013年第3期214-223,共10页
Three fiber Bragg grating (FBG) sensors systems for hydrogen detection are presented using the classic Pd (palladium) coating technique (500nm) as the hydrogen sensitive film and titanium (Ti) as the adhesive ... Three fiber Bragg grating (FBG) sensors systems for hydrogen detection are presented using the classic Pd (palladium) coating technique (500nm) as the hydrogen sensitive film and titanium (Ti) as the adhesive layer with the etched cladding. These systems are compared and used for disaster environment prevention in hydrogen leakage environment where higher values than the normal are presented which increase the risk of explosion. With these systems, 0. 1% - 4% of the hydrogen volume concentration range in the volume ratio was detected and monitored experimentally in the test room with the very sensitive and stable value which reached 60pm/1% HE. In addition, a fast response time, about 6 s, was obtained with an advanced sensor. 展开更多
关键词 Fiber Bragg gratin (FBG) hydrogen detection SENSOR disaster environment prevention Pd coating technique
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GaInN light-emitting diodes with omni-directional reflector using nanoporous SnO_2 film 被引量:2
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作者 沈常宇 冯华君 +1 位作者 徐之海 金尚忠 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第2期152-153,共2页
Enhancement of light extraction in a GaInN light-emitting diode (LED) employing an omni-directional reflector (ODR) consisting of GaN, SnO2 nanorod and an Ag layer was presented. The ODR comprises a transparent, q... Enhancement of light extraction in a GaInN light-emitting diode (LED) employing an omni-directional reflector (ODR) consisting of GaN, SnO2 nanorod and an Ag layer was presented. The ODR comprises a transparent, quarterwave layer of SnO2 nanorod claded by silver and serves as an ohmic contact to p-type GaN. Transparent SnO2 sols were obtained by sol-gel method from SnCl2·2H2O, and SnO2 thin films were prepared by dip-coating technique. The average size of the spherical SnO2 particles obtained is 200 nm. The refractive index of the nanorod SnO2 film layer is 2.01. The GaInN LEDs with GaN/SnO2/Ag ODR show a lower forward voltage. This was attributed to the enhanced reflectivity of the ODR that employs the nanorod SnO2 film layer. Experimental results show that ODR-LEDs have lower optical losses and higher extraction efficiency as compared to conventional LEDs with Ni/Au contacts and conventional LEDs employing a distributed Bragg reflector (DBR). 展开更多
关键词 coating techniques Distributed Bragg reflectors Light reflection NANORODS Ohmic contacts Optical losses Porous materials Refractive index Semiconducting gallium compounds Sol gel process Thin films Tin oxides
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