二元低熔点合金储热性能的研究  

Investigation on Heat Storage Property of Binary Eutectic Alloy Based on Sn,Bi and Pb

作　　者：李元元[1] 程晓敏[1] 俞铁铭[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《热加工工艺》2012年第24期35-37,共3页Hot Working Technology

基　　金：国家科技支撑计划项目(2012BAA05B05);中国博士后科学基金面上项目(20110491223)

摘　　要：以低熔点合金Sn、Bi和Pb原料,制备了Sn-Bi、Sn-Pb和Bi-Pb共晶合金。采用XRD、DSC和激光热常数测试仪对产物结构和热物理性能进行了表征。结果表明,Sn-58Bi合金相变温度在136.9～149.1℃,相变潜热为40.84 J/g,比热容为0.17 J/(g·K),热导率为16.2 W/(m·K)。在制备的合金中,储热能力大小依次为Sn-58Bi>Sn-38Pb>Bi-45Pb。Sn-Bi, Sn-Pb and Bi-Pb eutectic alloy were prepared by casting technology. The microstructure and heat storage property were investigated by optical microscope, XRD, DSC and laser thermal constants measuring apparatus. The results show that the latent heat of the alloy is 40.84 J/g （344.3 J/cm3）, the phase-change temperature is from 136.9 to 149.1℃, and the specific heat capacity is 0.17 J/（g. K）. The latent storage property decreases with the order： Sn-58Bi〉Sn-38Pb〉Bi-45Pb.

关 键 词：Sn—Bi Sn—Pb BI PB 储热性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]