Determination Method of Thermal Expansion Coefficient of Cordierite

被引：0

作者：

YANG Daoyuan ^{[1
]}

ZHU Kai ^{[2
]}

WU Juan ^{[1
]}

机构：

[1] School of Materials Science and Engineering,Zhengzhou University

[2] Henan Province Product Quality Supervision and Inspection Center

来源：

China's Refractories | 2013年 / 22卷 / 04期

基金：

中国国家自然科学基金;

关键词：

cordierite; thermal expansion coefficient; calculation method; high temperature XRD;

D O I：

暂无

中图分类号：

TQ175.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

Cordierite ceramics were prepared by using talc,bauxite and kaolin clay as starting materials.According to the detected result of XRD step-scanning from 25° to 35°by a high temperature X-ray diffractometer,2θ and d values of five peaks of cordierite crystal were ascertained.Then the least squares technique was used to calculate the crystal parameters:at 25℃,a=b=0.981 8nm,c=0.927 4 nm,V=0.774 3 nm3;at 600℃,a=b=0.982 0 nm,c=0.926 2 nm,V=0.773 5 nm3.The crystal volumetric coefficient of thermal expansion(CTE)and linear CTE along a and c axes were calculated,αV=2.33×10-6℃-1,αa=αb=3.27×10-6℃-1,αc=-4.19×10-6℃-1.The average CTE of cordierite crystal is as low as 0.78×10-6℃-1.

引用

页码：14 / 17

页数：4

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