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ZrO2粒径对ZrO2/ZrW2O8复合材料性能的影响

Xiao-nong CHENG,Ting-bo FU,Xin-bo YANG,Xue-hua YAN

Journal of Jiangsu University(Natural Science Edition)（2007）

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Abstract
分别采用Nano-ZrO2和Commercial-ZrO2制备ZrO2/ZrW2O8复合材料,并对所得复合材料的微观结构、烧结质量及其热膨胀性能进行了研究.结果表明,当ZrO2和ZrW2O8的质量比为2∶ 1时,ZrO2/ZrW2O8复合材料的热膨胀系数极低,接近于零.然而Commercial-ZrO2/ZrW2O8复合材料存在致密度不高,气孔率大的缺点.Nano-ZrO2的采用,可以降低基体的烧结温度,改善复合材料的烧结质量,Nano-ZrO2/ZrW2O8复合材料的相对密度达到94%,比Commercial-ZrO2/ZrW2O8的相对密度75%有明显提高.
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Key words
low thermal expansion,ZrW2O8,nano-ZrO2,negative thermal expansion,composites
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