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掺铝氧化锌(AZO)导电薄膜的研究进展 总被引:1,自引:0,他引:1
综述透明导电薄膜的性能、种类、制备工艺、研究及应用状况,重点讨论掺铝氧化锌(AZO)薄膜的结构、导电机理、光电性能和当前的研究焦点。并指出,为了进一步提高透明导电薄膜的性能,应从以材料选择、制备工艺、多层膜光学设计等方面深入研发,以满足尖端技术的需要。 相似文献
3.
在实验研究的基础上,采用分子模拟的方法,对在水解-水热体系中TiO2纳米颗粒晶相生成原理进行了系统的模拟计算和建模研究,文章介绍了分子模拟软件Hyperchem的计算方法,建立了钛离子水解过程和能量分布模型,利用模拟计算和模型,直观和定量分析了水解中间产物、水热晶化过程以及最终产物间的关系。研究了pH值对同质异构相成因的影响机理;静电场作用对同质异构相生成的影响。考察了水合络离子的连接方式,指出顶角连接与棱边连接保持到最终产物的结构中。从能量的角度揭示了同质异构TiO2晶型成因。 相似文献
4.
以金属离子盐和草酸为原料,采用室温固相化学反应合成掺杂ZnO前驱物,根据DSC-TG分析结果,将其在450℃热分解2 h,得到掺杂ZnO粉体,并用此粉体制备了片式ZnO压敏电阻。借助XRD、TEM、BET等检测手段对粉体产物的物相、形貌、粒度等进行了表征。研究了烧结温度对ZnO压敏电阻电性能的影响。结果表明,所制备的粉体为平均粒径24 nm左右、颗粒呈球状、分散性好的纤锌矿结构掺杂ZnO。在1 080℃烧结时,ZnO压敏电阻的综合电性能达到最佳,电位梯度为791.64 V/mm,非线性系数为24.36,漏电流为43μA。 相似文献
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R. Etchart-Salas V. Rat J. F. Coudert P. Fauchais N. Caron K. Wittman S. Alexandre 《Journal of Thermal Spray Technology》2007,16(5-6):857-865
Direct current Suspension Plasma Spraying (SPS) allows depositing finely structured coatings. This article presents an analysis
of the influence of plasma instabilities on the yttria-stabilized suspension drops fragmentation. A particular attention is
paid to the treatment of suspension jet or drops according to the importance of voltage fluctuations (linked to those of the
arc root) and depending on the different spray parameters such as the plasma forming gas mixture composition and mass flow
rate and the suspension momentum. By observing the suspension drops injection with a fast shutter camera and a laser flash
sheet triggered by a defined transient voltage level of the plasma torch, the influence of plasma fluctuations on jet or drops
fragmentation is studied through the deviation and dispersion trajectories of droplets within the plasma jet.
This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been
expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain
Montavon, Ed., ASM International, Materials Park, OH, 2007. 相似文献
7.
ZnO:Al(AZO)薄膜制备工艺参数的正交优化设计 总被引:1,自引:0,他引:1
采用正交设计法,对溶胶-凝胶方法制备AZO薄膜的工艺参数进行了优化研究;确定了最佳工艺参数,为制备AZO薄膜的工业化控制提供了一种可行的方法。 相似文献
8.
Yujie Wu Amit Bandyopadhyay Susmita Bose 《Materials Science and Engineering: A》2004,380(1-2):349-355
Magnesia–doped alumina and yttria–doped zirconia nano-powders were synthesized using sucrose as a chelating agent and template material from the aqueous solutions of aluminium nitrate, magnesium nitrate, ytrrium nitrate and zirconyl nitrate, respectively. Synthesis parameters were optimized with varying sucrose to metal ion ratio, calcinations time, and temperature to produce these nano-powders. As-synthesized powders were characterized by room temperature X-ray diffraction, BET surface area analyzer and transmission electron microscopy. Y2O3–ZrO2 nano-powders had particle size in the range of 80–200 nm with specific average surface area of 119 m2/g and for MgO–Al2O3 powders, particle sizes were 30–200 nm with the specific average surface area of 250 m2/g. Our results indicate that this synthesis method is a versatile one and can be applied to a variety of oxide-based materials to form nano-powders. Nano-powders were compacted uniaxially and densified in a muffle furnace. Sintered discs were used for hardness testing and density measurements, as well as for microstructural characterization. 相似文献
9.
《Ceramics International》2020,46(8):11978-11987
The columnar structure and its formation process have a significant effect on the electrical properties of Al-doped ZnO (AZO) thin film in-situ deposited at room temperature by magnetron sputtering method. The influences of RF power on the formation of the columnar structure and its regular pattern were systematically investigated. The RF power varied from 120 W to 240 W. The best quality AZO sample with the sheet resistance of 6.07 Ω/sq and average transmittance of 83.2% was obtained at 210 W (for 30 min). The analysis of crosses section images indicated that the columnar structure appeared earlier at higher RF power. The thickness at which the columnar structure began to appear didn't fluctuate at a fixed value. Furthermore, high RF power relatively contributed to reduce the thickness. The Drude's model was used for examining the correlation between optical and electrical behaviors, and the theoretical results of electrical properties were well matched with the experimental data. According to the XRD results and XPS analysis, the appearance of Al2O3 may exert a significant influence on the deterioration in electrical properties of the sample deposited at 240 W. 相似文献
10.
《Ceramics International》2020,46(14):21925-21931
In this work, a wide and highly sensitive chemiresistive sensor has been developed based on the AZO nanocolumn array film. This is meant for the room detection of H2O2 under UV illumination. A cost-effective one step multi-layers growth process was adopted for the synthesis of the AZO nanocolumn array. The experimental studies were done by scanning electron microscopy (SEM), transmission and electron microscopy (TEM).Then X-ray diffraction confirmed that the AZO column array was closely packed, connected, vertically aligned, and polycrystalline, with a high surface area. This structure ensures better electrical conduction over random and separated nanostructures. The hall-effect measurement indicates that the AZO film was n-type, with high conductivity (3.60 × 103 Ωcm), high carrier density (11.3 × 1020cm−3) and with acceptable mobility (0.95 cm2/Vs). The x-ray photoemission spectroscopy suggests that the AZO film consists of a large amount of adsorbed oxygen-related species at the sheath layer of the thin-film, which is vital for sensors. By the UV light activation, sensors based on the AZO nanocolumn array exhibited enhanced H2O2 detection properties at room temperature. At a concentration from 15 μM to 30 mM, H2O2 sensitivity evaluated by relative response was remarkably increased from 15% to 36%. The operation under ambient conditions and wide range sensing shows that this chemiresistive AZO sensor is adequate for biomedical and environmental applications. 相似文献