High-purity high density yellow tungsten oxide is a yellow powder with excellent pressing property to prepare tungsten trioxide target with high purity and super high density.
The production of high-purity high density tungsten trioxide target should be studied from the aspects of powder, forming and sintering. The optimized combination of the three aspects is necessary to prepare tungsten trioxide target with high purity and high density. The specific research contents include:
1. To produce tungsten trioxide powder with high purity, high sintering activity and excellent pressing property. High-purity tungsten oxide with purity greater than 99.99% is used as raw material to prepare WO3 powder by low energy rolling ball milling process, for studying the mechanism of ball milling and the effects of milling process, milling media on the particle size, structure and purity of tungsten trioxide.
2. To optimize pressing process of tungsten trioxide ceramic. The granulation of WO3 is molded at different pressures to analyze the relationship between pressure and compact density, and the dispersion of compact density. The optimal pressing process is discussed.
3. To optimize sintering process of tungsten trioxide ceramic. The effects of sintering temperature and compact density on sintering density are analyzed to find out the best sintering technology.
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