二元硝酸盐的热物性测试及比热分析  

Analysis on thermal physics and test of specific heat capacity of binary nitrate salt

作　　者：葛顺鑫 李方义[1] 贾秀杰[1] 郭琦[1] 

机构地区：[1]山东大学机械工程学院高效洁净机械制造教育部重点实验室,济南250061

出　　处：《功能材料》2014年第15期15009-15011,共3页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013400);国家自然科学基金资助项目(51375278)

摘　　要：二元硝酸盐是非常重要的传热介质，通过熔融法制备混合盐试样，利用差示扫描量热法和蓝宝石法分别研究测定了 KNO 3-NaNO 2混合盐的热物性以及比热值。研究结果表明，二元硝酸盐具有较低的熔点和良好的热稳定性，适宜的工作温度在200~430℃之间。熔盐的比热值随成分不同有所变化，但在工作温度范围内变化很小。为熔盐的使用工艺改进提供了数据支持。Binary nitrate salt was an important heat transfer medium.Mixed salt samples were prepared by mol-ten method.The thermal physics and specific heat capacity of the mixed salt consisted of KNO 3 and NaNO 2 were studied and measured separately by differential scanning calorimetry （DSC）and sapphire method.The re-sults showed that binary nitrate salt has low melting point and good thermal stability.The optimal operating temperature was between 200 and 430 ℃.The specific heat capacity of molten salt changes with the composition but changes little in the operating temperature.This experimental research provided data support for improving heat treatment process.

关 键 词：硝酸盐 差示扫描量热法 热物性 比热 

分 类 号：TG154[金属学及工艺—热处理]