新型低熔点混合四元硝酸盐优选及其热物性研究

王玥; 鹿院卫; 王元媛; 吴玉庭; 张灿灿; 刘金恺

doi:doi:10.19912/j.0254-0096.tynxb.2024-1191

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新型低熔点混合四元硝酸盐优选及其热物性研究

更新时间：2026-01-08

- 新型低熔点混合四元硝酸盐优选及其热物性研究
- Vol. 46, Issue 12, Pages: 85-90(2025)
- 作者机构：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1191
  CLC： TK519
- Published Online：07 January 2026，
  
  Published：2025
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王玥, 鹿院卫, 王元媛, et al. 新型低熔点混合四元硝酸盐优选及其热物性研究[J]. 2025, 46(12): 85-90.
DOI：

王玥, 鹿院卫, 王元媛, et al. 新型低熔点混合四元硝酸盐优选及其热物性研究[J]. 2025, 46(12): 85-90. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1191.

摘要

为使混合熔盐能在更低温度下使用

扩宽混合熔盐的工作温度范围

以KNO3-NaNO2-KNO2-Ca（NO3）2四元系混合硝酸盐为研究对象

采用DSC、TG测试分析方法

筛选出一种新型低熔点四元硝酸盐。对新型四元盐在不同温度下恒温失重情况进行研究

并对其比热容、密度、导热系数等进行测试分析。研究结果表明：新型四元盐熔点为94.8 ℃

分解温度达到622.3 ℃

储热密度达到696.43 kJ/kg

在550 ℃工况下恒温48 h后样品失重率仅为2.71%

表现出良好的热稳定性。

Abstract

To lower the minimum operating temperature and broaden the working temperature range of mixed molten salts

a quaternary nitrate mixture of KNO-NaNO-KNO-Ca（NO） was studied. Using DSC and TG analysis methods

a new low-melting-point quaternary nitrate was identified. The thermal stability of the new quaternary salt was investigated through isothermal weight loss measurements at various temperatures. Furthermore

its thermal properties such as specific heat

density

and thermal conductivity were tested and analyzed. The research findings indicate that the new quaternary salt has a melting point of 94.8 ℃

a decomposition temperature of 622.3 ℃

and an energy storage density of 696.43 kJ/kg. After maintaining a constant temperature of 550 ℃ for 48 hours

the sample exhibits a low weight loss rate of only 2.71%

demonstrating excellent thermal stability.

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references

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