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Thermal conductivities of Zr-based transuranium nitride solid solutions

Zr含有超ウラン窒化物固溶体の熱伝導率

西 剛史; 高野 公秀; 市瀬 健一; 赤堀 光雄; 荒井 康夫

Nishi, Tsuyoshi; Takano, Masahide; Ichise, Kenichi; Akabori, Mitsuo; Arai, Yasuo

本研究では、2種類の(Zr,Pu,Am)Nと(Zr,Np,Pu,Am,Cm)N固溶体の焼結体試料を調製し、レーザフラッシュ法により熱拡散率を、ドロップカロリメトリにより比熱を測定し、熱伝導率を算出した。その結果、(Zr,Pu,Am)N及び(Zr,Np,Pu,Am,Cm)Nの熱伝導率は(Pu,Am)Nよりも熱伝導率が大きいこと,ZrNの熱伝導率は温度依存性が小さいものの、(Zr,Pu,Am)Nと(Zr,Np,Pu,Am,Cm)Nの熱伝導率は(Pu,Am)Nよりも温度とともに顕著に増加することが明らかとなった。

In this study, we prepared the sintered samples of two kinds of (Zr,Pu,Am)N and (Zr,Np,Pu,Am,Cm)N solid solutions. The thermal diffusivity and heat capacity of Zr-based transuranium nitride solid solutions were measured by a laser flash method and a drop calorimetry, respectively. The thermal conductivities of (Zr,Pu,Am)N and (Zr,Np,Pu,Am,Cm)N were determined from the measured thermal diffusivity, heat capacity and bulk density. It was found that the thermal conductivities of (Zr,Pu,Am)N and (Zr,Np,Pu,Am,Cm)N were higher than that of (Pu,Am)N. It was also found that the thermal conductivities of (Zr,Pu,Am)N and (Zr,Np,Pu,Am,Cm)N obviously increased with temperature in comparison with (Pu,Am)N, although they were smaller than that of ZrN over the temperature range investigated.

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パーセンタイル:33

分野:Nuclear Science & Technology

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