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Thermal diffusivity, specific heat, and thermal conductivity of (Ca1−x,Mgx)Zr4(PO4)6 ceramic

✍ Scribed by Dean-Mo Liu

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
341 KB
Volume
23
Category
Article
ISSN
0921-5107

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✦ Synopsis

The thermal diffusivity (a), specific heat (C,), and thermal conductivity (K) of single phase (Ca,_x,Mg,)Zr,(PO,), (CMZP) ceramic with x=0.4 were investigated in terms of porosity and temperature.

The dense CMZP ceramic exhibited values of thermal conductivity lower by a factor of approximately two up to 600 "C. The conductivity can be further reduced, to as low as 0.4 W m-I K--I, by 30% porosity. The temperature dependence of thermal diffusivity became less pronounced with increasing porosity, and a near-constant coefficient of thermal conductivity about

1.1 x 10 4 conduction unit per degree Celsius at temperatures of 30-600 "C, was observed for different porosities. These findings indicate that the CMZP ceramic may be an attractive candidate for thermal insulating applications.

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