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CaF$$_{2}$$の熱伝導率とブレディッグ転移

The Bredig transition effect on the thermal conductivity of CaF$$_{2}$$

松本 卓; 土持 亮太; 廣岡 瞬 ; 加藤 正人   ; White, J.*; McClellan, K.*

Matsumoto, Taku; Tsuchimochi, Ryota; Hirooka, Shun; Kato, Masato; White, J.*; McClellan, K.*

UO$$_{2}$$やPuO$$_{2}$$と同様の蛍石結晶構造を有するCaF$$_{2}$$の熱拡散率, 熱膨張率及び比熱をレーザーフラッシュ法, 熱膨張計及びDSCにより最大1250$$^{circ}$$Cまで測定し、熱伝導率を導出した。蛍石構造が有する特徴の一つであるブレディッグ転移について熱伝導率へ与える影響を評価した。

The thermal diffusivity, thermal expansion and heat capacity of CaF$$_{2}$$ was measured with LFA, DIL and DSC up to 1250$$^{circ}$$C, then the thermal conductivity was evaluated. We evaluated how the Bredig transition which is one of the unique features of fluorite structure affect on the thermal conductivity.

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