共查询到17条相似文献,搜索用时 187 毫秒
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Y2O3-SnO2常温气敏薄膜的Sol-Gel制备及性能研究 总被引:2,自引:0,他引:2
以无机盐SnCl2.2H2O,Y(NO3)3.6H2O为原料,无水乙醇为溶剂,采用溶胶-凝胶工艺制备了Y2O3掺杂的SnO2薄膜,采用差热-失重分析研究了Y2O3掺杂的SnO2干凝胶粉末的热分解、晶体过程。研究了Y2O3-SnO2薄膜的电学和气敏性能,从实验中得到了Y2O3掺杂份量对SnO2薄膜电学及气敏性能的影响。实验表明Y2O3掺杂的SnO2薄膜在常温下对NOx具有较好的灵敏度的选择性,并具有较好的响应恢复性能,在常温下对H2S气体也具有一定的灵敏度。 相似文献
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分别在Cr(NO3)3、Y(NO3)3及二者混合溶液中以1Cr18NigTi不锈钢为阴极,电沉积Cr(OH)3、Y(OH)3及Cr(OH)3-Y(OH)3复合薄膜,然后经烧结生成Cr2O2-Y2O3及其复合薄膜层。通过研究末沉积试样与具有不同[Cr3+]和[Y3+]配比的薄膜试样在高温下静态氧化行为及表面氧化膜形貌、组成等,来探讨1Crl8Ni9Ti表面经Y、Cr的氧化物改性后的抗高温氧化性能。 相似文献
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掺杂聚苯胺磁化率的研究 总被引:6,自引:0,他引:6
分别研究了浓H2SO4掺杂本征态聚苯胺(PAn)、HCl掺杂PAn以及FeCl3掺杂这两种聚安在地的磁化率。通过研究磁化率的变化曲线,我们得到了一些有意义的结果:浓H2SO4掺杂PAa和HCl掺杂PAn的磁化率变化规律不同;FeCl3掺杂浓H2SO4-PAn材料可以获得比FeCl3掺杂HCl-PAn材料更高的磁化率;FeCl3在掺杂HCl-PAn材料和浓H2SO4-PAn材料时,FeCl3在这两种 相似文献
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在不锈钢上电沉积烧结Cr2O3—Y2O3薄膜及其改性后的抗高温氧化性能 总被引:1,自引:0,他引:1
分别在Cr(NO3)3、Y(NO3)3及二者混合溶液中以1Cr18Ni9T9不锈钢为阴极,电沉积Cr(OH)3、Y(OH)3及Cr(OH)3-Y(OH)3复合薄膜,然后经烧生成Cr3O4-Y2O3及其复合薄膜层。通过研究未沉积试样与具有不同配比的薄膜试样在高温下静态氧化行为及表面氧化膜形貌、组成等。来探讨1Cr18Ni9Ti表面经Y、Cr的氧化物改性后的抗高温氧化性能。 相似文献
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CeO2-Y2O3固体氧化物燃料电池的电化学性能 总被引:4,自引:0,他引:4
以Y2O3掺杂的CeO2为固体电解质,制备了电解质支撑的固体氧化物燃料电池。测定了H2-O2电池的电压-电流密度(V-I)和输出功率-电流密度(P-I)关系曲线。为抑制CeO2基材料的电子导电性的影响,采用溶胶凝胶技术,在阳极与电解质间制备了一层1μm厚的YSZ薄膜,750℃时,电池开路电压由0.73V上升到0.82V,最大输出功率密度从36mW/cm^2增加到54mW/cm^2,增大50%,证明YSZ阻挡膜确定能改善电池的电化学性能。 相似文献
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以金属β-二酮螯合物为原物质,采用新颖的一单一固态混合源MOCVD技术,较低温度下在不同衬底上成功地制备了Y2O3掺杂的CeO2(CYO)薄膜和Y2O3掺杂的SrCeO3(SCY-O)为主相的薄膜。CYO薄膜为萤石结构的多晶体,厚度约为2μm。 相似文献
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Patil GE Kajale DD Gaikwad VB Jain GH 《Journal of nanoscience and nanotechnology》2012,12(8):6192-6201
Nanostructured SnO2 thin films were prepared by spray pyrolysis technique onto glass substrates with different thickness by varying quantity of precursor solution. The structural, optical and electrical properties of these films have been studied. The crystallographic structure of the films was studied by X-ray diffraction (XRD). It is found that the films are tetragonal with (110) orientation. The grain size increases with thickness. Atomic Force Microscopy (AFM) showed that the nanocrystalline nature of the films with porous nature. The grain size increased 14 to 29 nm with increase in film thickness. The studies on the optical properties show that the direct band gap value decreases from 3.75 to 3.50 eV. The temperature dependence of the electrical conductivity was studied. The activation energies of the films are calculated from the conductance temperature characteristics. The nanostructured SnO2 thin films were used as sensing layers for resistive gas sensors. The dependence of gas sensing properties on the thickness of SnO2 thin films was investigated. The gas response of the SnO2 thin films towards the H2S gas was determined at an operating temperature of 150 degrees C. The sensitivity towards H2S gas is strongly depending on surface morphology of the SnO2 thin films. 相似文献
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用磁控溅射法在集成了铂加热电极的Si基膜片型微结构单元上制备了SnO2 和SnO2 Ag敏感薄膜。用温度调制方式和锯齿波加热方式研究了薄膜的电学特性 ,讨论了银催化剂、湿度及氧分压对SnO2 电学特性的影响。从温度调制方式下测得的电阻 温度曲线可以区分由热激发过程和由表面反应过程引起的膜电阻变化。这种方法为研究气敏薄膜表面反应过程和气敏响应机理开辟了新的途径。 相似文献
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采用二甲基二氯化锡(DMTC)为新前驱体,通过常压CVD法在硼硅玻璃基板上制备SnO_2∶F透明导电薄膜,研究了DMTC、TFA和H_2O的含量对薄膜结构及光电性能的影响,研究表明当F/Sn物质的量比为1∶1、H2O/Sn物质的量比为3∶2时,制备出可见光透过率84.17%、方块电阻9.2Ω/□且结晶性能良好的多晶SnO_2薄膜。通过与单丁基三氯化锡(MBTC)为前驱体所制备薄膜的性能进行比较,结果表明,两种前驱体所制备薄膜均具有四方金红石结构,利用DMTC不仅可以制备出与MBTC性能相近的薄膜,同时薄膜表面更加均匀。 相似文献
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Partridge JG Field MR Peng JL Sadek AZ Kalantar-Zadeh K Du Plessis J McCulloch DG 《Nanotechnology》2008,19(12):125504
This paper describes the morphology, stoichiometry, microstructure and gas sensing properties of nanoclustered SnO(x) thin films prepared by Sn evaporation followed by a rheotaxial growth and thermal oxidation process. Electron microscopy was used to investigate, in detail, the evolution of the films as the oxidation temperature was increased. The results showed that the contact angle, perpendicular height, volume and microstructure of the clusters all changed significantly as a result of the thermal oxidation processes. Electron diffraction and x-ray photoelectron spectroscopy measurements revealed that after oxidation at a temperature of 600?°C, the Sn clusters were fully transformed into porous three-dimensional polycrystalline SnO(2) clusters. On the basis of these results, a prototype SnO(2) sensor was fabricated and sensing measurements were performed with H(2) and NO(2) gases. At operating temperatures of 150-200?°C the film produced measurable responses to concentrations of H(2) as low as 600?ppm and NO(2) as low as 500?ppb. 相似文献