共查询到19条相似文献,搜索用时 125 毫秒
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以钛酸丁酯为原料,采用超声喷雾热解法制备了纳米二氧化钛薄膜自清洁陶瓷.利用XRD、EDS、SEM等测试手段对样品进行了表征,研究了热处理温度对二氧化钛薄膜微结构、成分及表面形貌的影响,采用菌落计数法测试了样品对大肠杆菌的抗菌性能,分析了TiO2的抗菌机理.结果表明,热处理温度为500℃时,TiO2薄膜为锐钛矿相,表面颗粒均匀,对大肠杆菌的抑菌率可高达98.42%;热处理温度为550℃时,陶瓷衬底中的Si4等微量元素向TiO2薄膜扩散,导致TiO2薄膜转变成无定形和锐钛矿相的混合态,抑菌率开始下降. 相似文献
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喷雾热解法制备SnO2:Sb透明导电薄膜 总被引:7,自引:5,他引:7
采用喷雾热解技术制备出了光电性能优良的SnO_2:Sb透明导电薄膜,对薄膜的结构特性、光电性质以及制备条件对薄膜性能的影响进行了研究。并进一步研究了喷雾热解法中薄膜的形成过程和工艺参数对薄膜微观结构和性能的影响。实验结果表明:在Sb掺杂量为11%(摩尔分数)和基板温度为500℃的条件下,SnO_2:Sb薄膜具有最佳的光电性能,平均可见光透过率为82%,方块电阻达13.4Ω/□,电阻率为4.9×10~(-4)Ω·cm。 相似文献
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分析了喷雾干燥技术的应用现状,指出了喷雾干燥技术在功能性产品制备方面的重要作用。以产品质量作为最终的目标函数,对喷雾干燥技术提出了更高的要求,特别是利用喷雾干燥技术制备高品质功能性材料,要求喷雾干燥技术的内涵更丰富,与交叉学科的联系更广泛。介绍了以喷雾干燥技术为平台的微胶囊制备、复合离子制备、超细化离子制备、喷雾热解法等新方法的基本原理以及制备实例。指出了喷雾干燥技术新的研究发展方向。 相似文献
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介绍了硅烷热解法制备多晶硅几种工艺如Komatsu的硅化镁法、UC的歧化法、MEMC的新硅烷法等,指出新硅烷法是一种比较优秀的路线。 相似文献
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Niobium oxide thin films were deposited on the glass and fluorine doped tin oxide (FTO) coated glass substrates using simple and inexpensive spray pyrolysis technique. During deposition of the films various process parameters like nozzle to substrate distance, spray rate, concentration of sprayed solution were optimized to obtain well adherent and transparent films. The films prepared were further annealed and effect of post annealing on the structural, morphological, optical and electrochromic properties was studied. Structural and morphological characterizations of the films were carried out using scanning electron microscopy, atomic force microscopy and X-ray diffraction techniques. Electrochemical properties of the niobium oxide thin films were studied by using cyclic-voltammetry, chronoamperometry and chronocoulometry. 相似文献
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《Ceramics International》2019,45(10):12691-12699
Cu1-xZnxO composite thin films were prepared using industrially applicable spray pyrolysis technique for volatile organic compound (VOCs) sensor application. Sensing properties for different concentration of VOCs such as acetone, ethanol and methanol were studied at different sensor operating temperature. XRD studies on prepared thin films confirmed formation of CuOZnO composite thin films with presence of different peaks for monoclinic structured CuO and hexagonal structure ZnO, it was also observed that formation of composite material improves sensing property towards VOCs. Granular morphology observed from SEM images were also contributed to enhance sensitivity of Cu1-xZnxO thin films. Hot probe experiment reveals that all the thin films were p-type in conductivity nature. Maximum electrical conductivity was achieved for Cu0.75Zn0.25O composite thin films, which also showed highest sensing property for VOCs. Cu0.75Zn0.25O thin films were selective towards ethanol and were capable of detecting 1 ppm of ethanol at operating temperature of 290 °C. 相似文献
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Silicon - Nickel oxide (NiO) thin films were prepared by spray pyrolysis technique using a solution of nickel (II) chloride hexahydrate (NiCl2.6H2O) and distilled water on glass substrates. The... 相似文献
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《Ceramics International》2017,43(4):3562-3568
In this article, the gas sensing properties of Al-doped ZnO thin films have been reported where the nanocrystalline ZnO based thin films were well deposited by a simple and inexpensive ‘chemical spray pyrolysis (CSP)’ technique. Films have been found to be uniform, pinhole free and well adherent to the substrate. The morphology, structures, and surface roughness of the deposited Al-doped ZnO thin films were studied by various types of characterization techniques. In addition, the authors have observed that the sensor response and selectivity towards CO gas is improved by the Al doping at a low operating temperature. XRD results showed that the obtained films are nanocrystalline in nature with hexagonal wurtzite phase. Further, the annealed films were used for detection of CO in the air and maximum response was observed at 175 °C. The improvement in sensor response of Al-doped ZnO thin films to CO gas attributed to the defect chemistry, crystallite size and surface roughness. 相似文献
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Electrochromic iridium oxide thin films were deposited onto fluorine doped tin oxide coated glass substrates from an aqueous iridium chloride solution by pneumatic spray pyrolysis technique. The as-deposited samples were X-ray amorphous. The electrochromic properties of thin films were studied in an aqueous electrolyte (0.5N H2SO4) using cyclic voltammetry (CV), chronoamperometry (CA) and spectrophotometry. Iridium oxide films show pronounced anodic electrochromism owing to Ir+4 ↔ Ir+3 intervalency charge transition. The reversibility of cyclic process in Ir oxide films is found to be higher, which increases with increasing number of colour-bleach cycles. 相似文献
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α-MoO3 thin films were deposited onto a glass substrate with 0.01 M ammonium heptamolybdate tetrahydrate as a precursor salt and deionized water as solvent using spray pyrolysis technique. The influence of precursor solution volume on the structural, morphological, optical and electrical properties were analysed and reported. 相似文献
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用喷雾热解法,在玻璃衬底上沉积得到了γ-Gd2S3纳米多晶薄膜。通过LCR仪和紫外可见光分光计对样品的物性进行了测试,结果表明:γ-Gd2S3纳米多晶薄膜的介电常数与常规材料有较大差异,特别是在低频范围内,等价于双层电介质模型,其响应行为类似于德拜驰豫;本征吸收区处在可见光范围内,与常规γ-Gd2S3吸收谱相比发生了红移。 相似文献
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以四氯化锡和氟化铵为原料,异丙醇和水为溶剂,采用喷雾热解法,在载玻片上制备氟掺杂二氧化锡导电薄膜(fluorine-doped tin oxide,FTO)。研究了四氯化锡浓度、氟化铵浓度、双氧水浓度、异丙醇与水的体积比对FTO薄膜的透光率和方块电阻的影响。运用X射线衍射仪、扫描电子显微镜、紫外-可见分光光度计和四探针测试仪分别对FTO薄膜进行了表征。结果表明:在喷雾热解液中加入少量的H2O2(0.05mol/L)可明显提高FTO薄膜在可见光区的透光率,而不影响其方块电阻;当喷雾热解液组成为0.8mol/LSnCl4,0.1mol/LNH4F,0.05mol/LH2O2,异丙醇与水的体积比为8:2,衬底温度为500℃,喷涂100次时,所得FTO薄膜在可见光区的平均透光率为84%,方块电阻为15Ω/□,且FTO薄膜平整致密、二氧化锡晶粒均匀。 相似文献