Synthesis of ZrO2/ZrW2O8 composites with low thermal expansion
Synthesis of ZrO2/ZrW2O8 composites with low thermal expansion
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DOI：
10.1016/j.compscitech.2006.05.012
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发表时间：
2007-05
影响因子：
9.1
通讯作者：
Xinbo Yang;Xiao-Nong Cheng;Xuehua Yan;Juan-Yu Yang;Ting Fu;J. Qiu
中科院分区：
文献类型：
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作者：
Xinbo Yang;Xiao-Nong Cheng;Xuehua Yan;Juan-Yu Yang;Ting Fu;J. Qiu
本文成功地合成了具有极低热膨胀系数的ZrO 2/ZrW 2 O 8复合材料。将燃烧法合成的负热膨胀材料ZrW 2 O 8与ZrO 2按不同比例混合，在1473 K下烧结24 h。复合材料的热膨胀可以控制为正、负甚至为零，当ZrW 2 O 8的体积分数为37%时，复合材料的热膨胀几乎为零。少量的Al 2 O3添加剂通过形成固溶体和液相，可以迅速提高复合材料的致密度，而对材料的热膨胀性能影响不大。
In this work, ZrO2/ZrW2O8composites with very low thermal expansion coefficient were successfully synthesized. The negative thermal expansion material ZrW2O8which was synthesized by combustion method was mixed with ZrO2at various ratios and sintered at 1473K for 24h. The thermal expansion of the composites can be controlled, being positive, negative or even zero, the composite shows almost zero thermal expansion when the volume fraction of ZrW2O8is 37%. Small amount of Al2O3additive can increase the density of the composites rapidly with slight effects on the thermal expansion property by forming solid solution and liquid phase.