LiNO3-NaNO3-KNO3三元熔盐材料的设计及热稳定性研究

赵柏岑; 丁静; 魏小兰; 刘彬; 陆建峰; 王维龙

doi:10.11949/j.issn.0438-1157.20181406

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LiNO₃-NaNO₃-KNO₃三元熔盐材料的设计及热稳定性研究

热力学 | 更新时间：2026-07-24

- LiNO₃-NaNO₃-KNO₃三元熔盐材料的设计及热稳定性研究
- Design and thermal stability study of LiNO₃-NaNO₃-KNO₃ ternary molten salt system
- 化工学报 2019年70卷第6期页码：2083-2091
- 作者机构：
  
  1.中山大学材料科学与工程学院，广东广州 510006
  2.华南理工大学化学与化工学院，广东广州 510640
- 作者简介：
  
  赵柏岑（1995—），男，硕士研究生，zhaobc@mail2.sysu.edu.cn
  王维龙（1978—），男，副教授，wwlong@mail.sysu.edu.cn
- 基金信息：
  
  国家自然科学基金项目(U1707603;U1507113)
- DOI：10.11949/j.issn.0438-1157.20181406
  中图分类号： TK 02
- 收稿：2018-11-26，
  
  修回：2019-03-01，
  
  网络首发：2020-06-15，
  
  纸质出版：2019-06-05
- 稿件说明：
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赵柏岑, 丁静, 魏小兰, 刘彬, 陆建峰, 王维龙. LiNO₃-NaNO₃-KNO₃三元熔盐材料的设计及热稳定性研究[J]. 化工学报, 2019, 70(6): 2083-2091 DOI: 10.11949/j.issn.0438-1157.20181406.

ZHAO Baicen, DING Jing, WEI Xiaolan, LIU Bin, LU Jianfeng, WANG Weilong. Design and thermal stability study of LiNO₃-NaNO₃-KNO₃ ternary molten salt system[J]. CIESC Journal, 2019, 70(6): 2083-2091 DOI: 10.11949/j.issn.0438-1157.20181406.
赵柏岑, 丁静, 魏小兰, 刘彬, 陆建峰, 王维龙. LiNO₃-NaNO₃-KNO₃三元熔盐材料的设计及热稳定性研究[J]. 化工学报, 2019, 70(6): 2083-2091 DOI: 10.11949/j.issn.0438-1157.20181406. DOI：

ZHAO Baicen, DING Jing, WEI Xiaolan, LIU Bin, LU Jianfeng, WANG Weilong. Design and thermal stability study of LiNO₃-NaNO₃-KNO₃ ternary molten salt system[J]. CIESC Journal, 2019, 70(6): 2083-2091 DOI: 10.11949/j.issn.0438-1157.20181406. DOI：

摘要

采用共形离子溶液模型(conformalionic solution model

CIS) 在二元熔盐体系相图的基础上，对三元熔盐体系LiNO

-NaNO

-KNO

进行了相图计算，得到该三元体系最低共熔点为117.7℃，相应的摩尔分数组成分别为

(LiNO

) = 0.375，

(NaNO

) = 0.075，

(KNO

) = 0.550。按照热力学最低共熔点计算结果，采用熔融法制备了三元硝酸熔盐，通过DSC和TG实验测定其最低共熔点为118.3℃，这与计算得到的结果(117.7℃)基本一致。TG测试结果表明当温度低于587.2℃时，该三元熔盐体系较为稳定，其工作温度范围为118.3~587.2℃，该三元硝酸熔盐适合在太阳能热发电中作为高温传热蓄热材料使用。

Abstract

According to the binary molten salt system phase diagrams

the phase diagram of LiNO

-NaNO

-KNO

ternary molten salt system was calculated with the CIS model

it turned out that

the lowest eutectic melting point was 117.7℃ and the corresponding composition was

(LiNO

) = 0.375，

(NaNO

) = 0.075 and

(KNO

) = 0.550. The eutectic mixture was prepared based on the predicted eutectic composition

and a experiment test was carried out by the thermal gravimetric analysis (TG) and differential scanning calorimeter (DSC). The DSC test showed that the experimental melting point was 117.7℃

which was in good agreement with the result of this calculation. The TG test results show that the ternary molten salt system is stable when the temperature is below 587.2°C

and its working temperature range is 118.3—587.2°C. The system is quite suitable as a material for high-temperature heat transfer and heat storage in solar thermal power generation.

关键词

Keywords

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