The Synthesis and the Thermal Properties of CaZr₄(PO₄)₆ Materials

Abstract:

CaZr₄(PO₄)₆ ceramics were prepared with solid reaction of two-steps method. CaZr₄(PO₄)₆ powders were synthesized by solid-phase reaction with Ca (OH)₂, ZrO₂ and (NH₄)₂HPO₄ as raw materials. Then the powders precursor were sintered to CaZr₄(PO₄)₆ ceramics with single phase structure at 1400°C for 8 hours. The relative density was measured, the phase structure of the materials synthesized at different temperatures and the average coefficients of thermal expansion were investigated. The results showed that the relative density of CaZr₄(PO₄)₆ ceramics sintered at 1400°C was 93%. The average thermal expansion coefficients was 1.8×10^-6/°C from 25°C to 1400°C. The CaZr₄(PO₄)₆ ceramics obtained possesses low thermal expansion property in a broad range of temperatures.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 69-73
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.69
• Online since: July 2013
• Authors: Long Su, Wan Mei Sui, Yu Jie Liu
• Keywords: CaZr₄(PO₄)₆, Ceramic, Solid Phase Method, Thermal Expansion Coefficient

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