Thermal Expansion Anisotropy of Cordierite Crystal

Abstract:

Cordierite material was prepared by talc, bauxite and kaolin, and the coefficient of thermal expansion (CTE) of cordierite crystals could be determined by high temperature X-ray diffractmeter: the volume and average liner CTE is 2.31×10^-5°C-1 and 0.84×10^-5°C-1 (200°C -800°C) respectively; With the temperature increasing, the CTE in a or b axis direction increases, and in c axis direction decreases rapidly below 400°C then slowly, cordierite crystal is of obvious thermal expansion anisotropy. The orientation of crystal in sample is random, expansion and shrinkage partly counteract, so that the CTE of cordierite materials is low.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 201-204
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.201
• Online since: July 2011
• Authors: Dao Yuan Yang, Kai Zhu, Juan Wu, Guang Hui Wei, Jing Wei Liu
• Keywords: Anisotropy, Coefficient of Thermal Expansion, Cordierite Crystal, High Temperature X-ray Diffract Meter, Least Squares Technique

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