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核技术  2014 

FKZr的热物性及热稳定性研究

DOI: 10.11889/j.0253-3219.2014.hjs.37.090602, PP. 90602-90602

Keywords: FKZr,热物性,热稳定性

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Abstract:

熔盐堆冷却剂的热物性是熔盐堆物理、热工水力学设计以及安全分析的重要参数。KF-ZrF4(58-42mol%)(FKZr)是熔盐堆中的一个具有潜在应用价值的冷却剂。该组成熔盐的热物性在文献中鲜有报道,这为其实际应用带来困难。分别采用差示扫描量热(DifferentialScanningCalorimetry,DSC)、阿基米德和热重分析等方法测量和表征了FKZr熔盐的熔点、熔化焓、密度等重要的热物性参数和热稳定性。实验结果表明FKZr的熔点为693.6K,与文献报道结果一致,符合熔盐堆中冷却剂的要求;熔化焓为71.8J?g?1;密度为??3.3841?0.8954?10?3T(753?923K);热重分析表明FKZr在873K下性质稳定,不发生明显的挥发现象。

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