Thermal and dielectric properties of zirconyl phosphate compact |
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Authors: | M Omori Kuo -Chaun Hsu S Tsunekawa T Hirai |
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Affiliation: | (1) Institute for Materials Research, Tohoku University, 2-1-1 Katahira Aobaku, 980 Sendai, Japan |
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Abstract: | Experimental results are presented on the measurements of thermal expansion (up to 1500°C), thermal conductivity (up to 1000°C), dielectric constant (up to 450 °C) and tan (up to 800 °C) of zirconyl phosphate compacts obtained by sintering at 1600°C. The thermal expansion coefficient of the samples at the temperature below 1100°C was less than 1.7 × 10–6°C–1. The samples showed a definite shrinkage at temperatures of 1110 and 1470°C due to the phase transformations. The expansion at 1500°C was less than that at 1100°C probably because of the phase transformation. The thermal conductivity at room temperature was a very small value (0.0046 to 0.0065 cal s–1 cm°C–1 cm–2). The dielectric constant was close to 9. The value of tan° (–0.0001) measured is one of the lowest values for ceramic materials. |
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