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填充式skutterudite化合物(Ce或Y)_yFe_xCo_(4-x)Sb_(12)的固相反应合成及填充原子Ce或Y对晶格热导率的影响 被引量:2

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摘要 研究了以Sb, Co, Fe, 及Ce和Y的氯化物为起始原料, 用固相反应法合成填充式skutterudite化合物(Ce或Y)yFexCo4-xSb12的可能性和合成条件, 在 850~1 123 K温度及x = 0~1.0, y = 0~0.15组成范围内, 用固相反应法合成了单相的(Ce或Y)yFexCo4-xSb12化合物. Rietveld结构解析结果证明了固相反应法所得到的化合物(Ce或Y)yFexCo4?xSb12具有填充式skutterudite结构. (Ce或 Y)yFexCo4-xSb12化合物的Rietveld结构解析所得到的Ce或Y的填充分数与化学分析所得到的组成一致. 化合物的晶格常数随着在Co原子位置Fe置换量的增加及在skutterudite结构中的Sb二十面体空位上Ce的填充而明显增大. (Ce或 Y)yFexCo4-xSb12化合物的晶格热导率随着Ce 或Y原子在空位上的填充及在Co原子位置Fe的置换而大幅度下降.
出处 《中国科学(B辑)》 CSCD 北大核心 2000年第6期489-494,共6页 Science in China(Series B)
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参考文献10

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同被引文献30

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