【作者】 韩海涛；

【导师】 杨海涛；

【作者基本信息】 武汉理工大学 ， 光电子信息材料， 2007， 硕士

【摘要】 WO₃（三氧化钨，Tungsten trioxide）是一种极为重要的高技术原材料，在化工、能源、电力、电子等众多的领域有着巨大的应用潜力，在诸如电致变色、气体探测和化学催化等方面得到了较系统的研究。但是，WO₃陶瓷材料分别有多个晶相存在或共存，其中的W离子可呈不同价态，一般情况下结构中总是存在着不同程度的氧空位，这些因素相互关联，使得在目前对WO₃陶瓷的相关性质的认识上还没有形成一个清晰全面的物理图像。我国的钨矿分布很广，除东北三省外各地均有发现，钨的储量在世界上排名第一，占全球总量的45％，远远高于名列第二的加拿大（储量为13％）。但是，我国对钨氧化物物理性能的研究远远落后于欧美和日本等国。因此，深入系统的研究钨氧化物的性质，就具有重要的科学意义和应用价值。本次课题主要是研究三氧化钨纳米粉的制备及在此基础上制备高纯的致密的三氧化钨陶瓷作为靶材之用，使其最终能在国内形成产业化，从而降低三氧化钨薄膜制备成本，为更好的对三氧化钨薄膜的制备及性能研究奠定基础。本文采用机械球磨法制备纳米级三氧化钨细粉作为烧结制备三氧化钨陶瓷的原料，系统研究了球磨参数对粉末粒度的影响。采用一般的电子陶瓷工艺分别在常压和氧气氛下烧结制备了三氧化钨多晶陶瓷块体。系统深入的研究了一些关键性的制备工艺参数以及影响三氧化钨烧结致密化的众多因素，从而找到最佳烧结工艺方法。通过常用的显微分析手段确定了三氧化钨样品的物相和形貌，分析了常压烧结三氧化钨样品颜色变黑的原因及解决方法。由于部分钨离子被还原到低价态，存在有一定的氧缺位导致了三氧化钨样品颜色变黑。而在氧气氛下烧结，充足的氧气保证了钨离子不会被还原到低价态，很好的解决了三氧化钨颜色变黑的问题。更多还原

【Abstract】 WO₃（tungsten trioxide） is a very important high-tech materials, it has tremendous application potential in areas of chemical industry, energy, electricity, electronics and many other fields. It is systematic study in electrochromic, gas detector and chemical catalysts. However, WO3 ceramics were more crystalline phase coexistence, the W ions showed different valence, Under normal circumstances, the structure exist different levels of oxygen vacancies, these factors are interrelated, made the understanding of WO3 ceramics in the current lack of a clear and comprehensive physical images. China’s tungsten ore were widely distributed, it have been found in many place except the three northeastern Province, tungsten reserves is the first in the world, cent of the global total of 45%, far higher than the second highest in Canada （13% of reserves）. However, the research of tungsten oxide physical properties was lags far behind Europe, the United States and Japan. Therefore, it is an important scientific significance and value in-depth study of the tungsten oxide property. The main task is to study the tungsten oxide nanoparticles preparation, and in the preparation of high purity on the basis of the compact Tungsten Oxide Ceramic Targets for use, it will eventually form in the domestic industry, thereby reducing WO₃ Films costs, to laying the foundations of WO3 film preparation and properties research.In this paper, prepared nano-WO₃ powder by mechanical milling as the materials of sintering prepared as tungsten oxide ceramic, the effects of parameters of the ball milling to powder size was study. Application of the normal electronic ceramic technology in atmospheric pressure and oxygen atmosphere were sintered tungsten trioxide polycrystalline ceramic block. System-depth study of some of the key parameters of preparation and impact WO₃ densification of factors, so as to find the best sintering method. The micro analysis was used to determine the samples of tungsten oxide phase and morphology, analyse the reasons of pressureless sintering of tungsten oxide samples darkening and solutions. As part of tungsten ions are reduced to low-cost state, there is a certain of oxygen vacancy led to tungsten oxide samples darkening. In oxygen atmosphere sintering, to ensure adequate oxygen tungsten ions will not be reinstated to the low state, good solution of WO3 darkening problems.更多还原