THERMAL EXPANSION OF ZrO2-ZrW2O8 COMPOSITES PREPARED USING CO-PRECIPITATION ROUTE

摘要：

In this work, a series of ZrO2/ZrW2O8 ceramic composites with different amounts of ZrW2O8 were successfully prepared by calcining the precursors synthesized using co-precipitation route at 1150℃ for 3 h. The X-ray diffraction (XRD) data confirmed that the composites only consisted of α-ZrW2O8 phase and m-ZrO_2 phase. The scanning electron microscopy (SEM) analysis of the synthesized ZrO_2/ZrW2O8 composites showed that the specimens had good mixed-uniformities. In addition, the thermal expansion coefficients of the composites decreased with increased amounts of negative thermal expansion ZrW2O8, specimen with 26wt％ ZrW2O8 shows almost zero thermal expansion and its average thermal expansion coefficient is -0.5897×10-6K-1 in the temperature range from 30℃ to 600℃.

关键词： ZrW2O8 ZrO2 composite thermal ezpansion sintering additive

作者: HONGFEI LIU ZHIPING ZHANG XIAONONG CHENG JUAN YANG

作者单位: School of Materials Science and Engineering, Jiangsu University, Zhenjian, Peoples Republic of China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1449-1454

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）