Effects of ZrO2's mean size on ZrO2/ZrW2O8 composites' properties

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作者：
School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China [1 ]
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来源：
Jiangsu Daxue Xuebao Ziran Kexue Ban J. Jiangsu Univ. Nat. Sci. Ed. | 2007年 / 6卷 / 487-490期
关键词：
Microstructure - Nanoparticles - Particle size - Particle size analysis - Porosity - Sintering - Temperature - Thermal expansion - Tungsten compounds - Zirconium compounds;
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摘要：
ZrO2/ZrW2O8 composites were synthesized using commercial ZrO2 and nano-ZrO2. The micro-structure, sintering ability and thermal expansion of the composites were studied. The ZrW2O8/ZrO2 composite shows almost zero thermal expansion when the weight ratio of ZrO2 and ZrW2O8 is 22:1. However, commercial-ZrO2/ZrW2O8 exhibits low relative density and high porosity. The results indicate that nano-ZrO2 can reduce the sintering temperature of ZrO2 matrix and improve sintering ability of the composites in the same condition. The relative density of nano-ZrO2/ZrW2O8 is 94%, which is higher than 75% of commercial-ZrO2/ZrW2O8.
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