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F. Y. Chen1)and E. D. Delber2) 1) State Key Laboratory of Solidification Process , Northwestern Polytechnic University , Xi’an 710072 , China 2) Department of Ceramics Engineering , University of Missouri Rolla , Rolla , Mo 654301 , USA
金属学报(英文版)
Theelectricalresistivityofsodium iron phosphate melts wasinvestigated asa functionoftem peratureand composition. Irreversibility was found in thetemperature dependent electricalresistivityinthe melts withlow Na2 Ocontentduringtheheating andcoolingcycle. Theirre versibility wasreduced withincreasing Na2 Ocontent. Theelectricalresistivity tendedto de creaseslightly withtime. Theelectricalconduction ofthe meltscontainingsimulatedindustry waste wassimilartothatofthe melts withsimilarsodacontent. Thetemperature dependent electricalresistivity and activation energy ofthese melts was discussed using the Motttheory and wascorrelatedtothe Fe(II) contentinthe melts
关键词: irreversibility , null , null
张秀钦 , 林国星 , 陈金灿
工程热物理学报
建立受有限速率热传导和绝热过程不可逆性影响的二级磁Brayton制冷循环模型,导出循环的性能系数和制冷率表达式,分析等磁场过程的磁场比、绝热不可逆因子、等磁中冷过程等对二级不可逆磁Brayton制冷循环最大制冷率及相关参数的影响,所得结论能为提高磁制冷机的循环性能提供参数设计参考.
关键词: 磁制冷 , 布雷顿循环 , 不可逆性 , 中冷 , 优化
