共查询到18条相似文献,搜索用时 62 毫秒
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纳米材料SnO2的室温固相合成及其气敏特性 总被引:5,自引:1,他引:5
以无机物SnCl4.5H2O、Na2CO3(摩尔比1:2)为原料,室温下研磨,使其发生固相化学反应,制得SnO2,采用X-射线衍射技术(XRD)和透射电子显微镜(TEM)等测试手段对材料的物相和微观结构进行了分析,结果表明,所得产物为理论产物,该材料制成的烧结型元件对可燃性气体有很高的灵敏度,通过控制工作温度可提高元件的选择性。 相似文献
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CdSnO3纳米材料的室温固相合成及其气敏特性研究 总被引:4,自引:0,他引:4
以无机盐为原料,在遵守热力学限制的前提下,采用室温固相化学反应法合成了复合氧化物CdSnO3,X-射线粉末衍射(XRD)、透射电镜(TEM)等表征结果表明,固相反应完全,产物为β-CdSnO3,其粒径为30 nm左右,与传统方法相比,该法降低了CdSnO3的物相形成温度.气敏性能测试结果表明,以该法合成的CdSnO3为基体的气敏元件,对体积分数0.005%酒精的灵敏度高达63.6倍,抗干扰能力强,响应-恢复快,为应用前景良好的酒敏材料. 相似文献
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介绍了氧化物半导体甲烷气体敏感元件的工作机理,论述了改善氧化物半导体甲烷气敏传感器性能的几种途径.采用加入催化剂、控制材料的微细结构、利用新制备工艺和表面修饰等新方法、新技术可提高氧化物半导体甲烷气敏元件的灵敏度、选择性、响应和恢复特性、稳定性. 相似文献
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贺少敏 《计算机光盘软件与应用》2013,(15):101-102
本文首先阐述了新型氧化物半导体光电极合成的开发背景,然后对新型氧化物半导体光电极合成中的氢气制备进行了探讨,最后展望了新型氧化物半导体光电极合成的技术前景,从这三个方面对新型氧化物半导体光电极的合成进行了浅析。 相似文献
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半导体氧化物气敏材料的电导振荡特性研究 总被引:3,自引:1,他引:3
本文对半导体氧化物气体敏感材料的电导振荡特性加以研究分析,通过试验与理论分析得出气敏电导振荡的必要条件,并对电导振荡型气体敏感元件的原理、工艺技术和结构等进行分析说明.同时,对半导体氧化物气体敏感材料的常温气体敏感特性进行归纳总结,指出其优缺点和需要解决的问题. 相似文献
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用NH4)2CO3作沉淀剂制得Cd:Sn=1:1的粉料,经750℃、15h热处理可得单相钛铁矿型β-CdSnO3。元件的电导-温度(G-t)特征表明β-CdSnO3为典型的表面电阻控制型气敏材料,无需掺贵金属催化剂就对还原性气体响很高的灵敏度。因此,β-CdSnO3很有希望作为一种新型的气敏材料体系。 相似文献
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Aditee JoshiAuthor VitaeS.A. GangalAuthor Vitae S.K. GuptaAuthor Vitae 《Sensors and actuators. B, Chemical》2011,156(2):938-942
Polypyrrole thin films were synthesized in situ by chemical polymerization. Fourier transform infrared spectroscopy revealed formation of polypyrrole. The morphological studies by scanning electron microscopy showed formation of uniform granular structure with average grain size of 0.6 μm. The film composition was characterized by X-ray photoelectron spectroscopy for chemical composition in polypyrrole film. These films were investigated for their sensing behaviour towards NH3 and NO at room temperature. It has been observed that these films are selective for NH3 and the sensitivity exhibited a linear response in range of 4-80 ppm. 相似文献
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J. Jiang Fanghua Mei W. J. Meng G. B. Sinclair Sunggook Park 《Microsystem Technologies》2008,14(6):815-819
For direct imprinting of metals, hard materials such as diamond and SiC have been used to construct mold inserts in preference
to Si, despite the ease in fabricating Si-based micro-/nano- scale structures. In this communication, we demonstrate that
micron scale Al structures can be replicated with good fidelity at room temperature by compression molding with Si inserts
without incurring insert damage. We further report on results of a finite element analysis of the mechanics of the molding
process. The finite element results provide some understanding of the observed lack of damage to the Si inserts. 相似文献
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Pérez-Campos A. Sinusía Lozano M. Garcia-Garcia F. Javier Chen Z. Iriarte G. F. 《Microsystem Technologies》2018,24(6):2711-2718
Microsystem Technologies - Scandium aluminum nitride alloy (ScAlN) thin films have been synthesized using reactive sputtering of a scandium aluminum alloy (Sc0.40Al0.60) target on Si (100)... 相似文献
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Copper-doped zinc oxide (ZnO) (1 mol%) nanocrystals were synthesized using a sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), inductive coupled plasma with optical emission spectrometry (ICP-OES). The XRD result indicated that the introduction of copper had no influence on the crystal structure of ZnO, though ICP-OES exhibited the molar ratio of copper and zinc was 0.86:100. The gas response of the copper-doped ZnO was also studied to ethanol and acetone without and with the illumination of 355 nm light. It was found that the ultraviolet light irradiation could enhance the gas response, and the mechanism with irradiation was discussed. Our results demonstrated that light irradiation was a promising approach to achieve large response at room temperature. 相似文献
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为了研究WO3的常温气敏性能,以热氧化钨丝的方法制备WQ3纳米材料并制作厚膜气敏元件,通过XRD对材料的晶体结构进行表征,对敏感元件进行了气敏性能测试,测得该元件在常温、0.4W/cm2紫外光(波长:300~450nm)辐照条件下对50ppm的NO2的灵敏度S=15.4,响应时间τres=2.5s,恢复时间τrec=18.1s;在加热功率为0.81W条件下,元件对50ppm NO2的灵敏度为S=22.5,响应时间τres=1.5s,恢复时间τrec=10.7s,研究了灵敏度对光功率密度和加热功率的依赖关系,实验结果表明WO3纳米材料在常温、紫外光照条件下对NO2具有较好的气敏性能. 相似文献