Sintering Preparation And Performance Study Of Tungsten Trioxide Ceramic

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.