In Situ Synthesis of ZrO2/ZrW2O8 Composites With Near‐Zero Thermal Expansion
In Situ Synthesis of ZrO2/ZrW2O8 Composites With Near‐Zero Thermal Expansion
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DOI：
10.1111/j.1551-2916.2007.01718.x
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发表时间：
2007-06
影响因子：
3.9
通讯作者：
Xinbo Yang;J. Xu;Hongjun Li;Xiao-Nong Cheng;Xuehua Yan
中科院分区：
文献类型：
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作者：
Xinbo Yang;J. Xu;Hongjun Li;Xiao-Nong Cheng;Xuehua Yan
本文以氧化锆和氧化钨为原料，采用原位反应法制备了氧化锆/氧化钨复合材料，并对其热膨胀性能进行了研究。该新方法包括升温至1473K，保温24小时，将合成和烧结相结合。结果表明，当ZrO_2和WO_3的质量比为2.5：1时，ZrO_2/ZrW_2O_8复合材料表现出近零的热膨胀。与未反应烧结的复合材料相比，该复合材料具有较高的相对密度和较低的气孔率。
In this paper, ZrO2 and WO3 were used as the raw materials to prepare ZrO2/ZrW2O8 composites by in situ reaction method and the thermal expansion property of the composites was studied. This novel method included a heating step up to 1473 K for 24 h, which combines the synthesizing and sintering of ZrW2O8. The result indicates that ZrO2/ZrW2O8 composite shows near-zero thermal expansion when the weight ratio of ZrO2 and WO3 is 2.5:1. Compared with composites prepared previously by non-reactive sintering of ZrO2 and ZrW2O8, the composites show higher relative density and lower porosity.