高温处理对LiNO_3-NaNO_3-KNO_3熔盐固相线温度的影响  

Influence of heat treatment on solidus temperature of LiNO_3-NaNO_3-KNO_3 molten salt

作　　者：程晓敏[1,2] 徐凯[1] 朱闯[1] 喻国铭[2] 刘志[2] 

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 [2]黄冈师范学院,湖北黄冈438000

出　　处：《储能科学与技术》2017年第5期1094-1098,共5页Energy Storage Science and Technology

基　　金：国家科技支撑计划(2012BAA05B05);湖北省科技支撑计划(2015BAA111)项目;中央高校基本科研业务费专项资金(WUT2017II23GX)

摘　　要：本文采用静态熔融法制备了LiNO_3-NaNO_3-KNO_3三元硝酸盐,并在520℃、680℃和720℃下对其进行了高温处理,研究了高温处理对其固相线温度的影响。采用差示扫描量热仪(DSC)和X射线衍射仪(XRD)对样品的热物性能和物相成分进行了表征。结果表明,在680℃下保温2h的样品固相线温度最低,为63.0℃,其物相成分中出现了碱金属氧化物和亚硝酸盐。LiNO3-NaNO3-KNO3 salt was prepared by static melting method. It was calcinated at 520 ℃, 680 ℃ and 720 ℃ for different time to investigate the influence of heat treatment on solidus temperature of the salt. Differential Scanning calorimeter （DSC） and X-ray diffraction （XRD） were used to characterize the thermo-physical properties and phase. Results show that the solidus temperature of the sample was lowered to 63.0 ℃ after treated at 680 ℃ for 2 h, while alkali metal oxides and nitrite were found.

关 键 词：硝酸盐 储热材料 传热介质 固相线温度 高温处理 

分 类 号：TK02[动力工程及工程热物理]