Research on the Al3+, V5+ Double Ionic Substitute Negative Thermal Expansion Compound Zr1-xAlxMoW1-yVyO8

摘要：

The ZrW2O8 family of materials has been shown to display the unusual property of an isotropic bulk contraction in volume with the rising of temperature. They have a number of potential applications, for example, they would be widely used in composite material and solid electrolyte based on its characteristic of negative thermal expansion and ionic conductive property. In this paper, an Al3+, V5+ double substitute negative thermal expansion (NTE) solid solution Zr1-xAlxMoW1-yVyO8 was synthesized by co-precipitation method. The phase composition, the micromorphology and the thermal expansion coefficient were obtained by using X-ray diffraction (XRD), scanning electronic microscope (SEM) and thermal mechanical analyzer (TMA), respectively. The results show that the sample’s density rises with the increasing of the content of V5+, while, its porosity declines. The thermal expansion coefficients of the samples are between -3.0~4.0×10-6 K-1, it indicates that their negative thermal expansion behavior is a little lower than that of ZrMoWO8. And the experiment also shows that these samples have displayed a fine behavior of heat shock resistance.

关键词： Negative thermal expansion Double ionic substitute Property

作者: Shaohua Shen Xianzhi Qin Shaobin Xiang Fuheng Hao Jing Tan Qiuguo Xiao

作者单位: School of Chemistry and Chemical Engineering, Hunan University of Science and Technology,Xiangtan, C School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan,

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 407-412

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）