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The synthesis, sintering, and thermal properties of (Ca1−x, Mgx)Zr4(PO4)6 (CMZP) ceramics

Published online by Cambridge University Press:  03 March 2011

T.K. Li ,
D.A. Hirschfeld ,
S. VanAken ,
Y. Yang  and
J.J. Brown
T.K. Li
Affiliation:
Center for Advanced Ceramic Materials, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0256
D.A. Hirschfeld
Affiliation:
Center for Advanced Ceramic Materials, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0256
S. VanAken
Affiliation:
Center for Advanced Ceramic Materials, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0256
Y. Yang
Affiliation:
Center for Advanced Ceramic Materials, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0256
J.J. Brown
Affiliation:
Center for Advanced Ceramic Materials, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0256
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Abstract

(Ca1−x, Mgx)Zr4(PO4)6 (CMZP) ceramics have been made by sol-gel and solid state reaction methods. Single phase (Ca1−x, Mgx)Zr4(PO4)6 (x = 0.4) has been obtained. The densification of CMZP depends on the powder synthesis method. Near theoretical density can be achieved by cold pressing and sintering with the addition of a sintering aid. Bulk thermal expansion of CMZP is shown to depend on the phase composition, grain size, and presence of microcracks. By choosing different sintering temperatures and times, the thermal expansion of CMZP can be controlled. CMZP (x = 0.4) ceramics exhibit near zero bulk thermal expansion, low thermal expansion anisotropy, low thermal conductivity, and thermal stability up to 1500 °C.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 11 , November 1993 , pp. 2954 - 2967
Copyright
Copyright © Materials Research Society 1993

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References

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