无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (6): 43-49.doi: 10.19964/j.issn.1006-4990.2022-0535

• 研究与开发 • 上一篇    下一篇

纯度对60%NaNO3-40%KNO3二元熔盐热物性的影响

罗志波2(), 王怀有1,3(), 王敏1,3(), 杜宝强1,3   

  1. 1.中国科学院青海盐湖研究所, 中国科学院盐湖资源综合高效利用重点实验室, 青海 西宁 810008
    2.盛新锂能集团股份有限公司, 四川 成都 610200
    3.青海省盐湖资源化学重点实验室, 青海 西宁 810008
  • 收稿日期:2022-09-06 出版日期:2023-06-10 发布日期:2023-06-14
  • 通讯作者: 王怀有(1985— ),男,博士,主要研究方向为基于盐湖资源的熔盐储能材料制备及应用;E-mail:why@isl.ac.cn
    王敏(1966— ),研究员,主要研究方向为盐湖资源高值化利用;E-mail:gxflwm@126.com
  • 作者简介:罗志波(1983— ),男,硕士,主要研究方向为中高温熔盐储能材料制备及热物性;E-mail:270082514@qq.com
  • 基金资助:
    国家自然基金区域创新发展联合基金重点项目(U22A20213);青海省盐湖资源化学重点实验室创新平台专项(2022-ZJ-Y06);中国科学院西部青年学者(E110HX0501)

Effect of purity on thermo-physical properties of 60% NaNO3-40% KNO3 binary molten salt

LUO Zhibo2(), WANG Huaiyou1,3(), WANG Min1,3(), DU Baoqiang1,3   

  1. 1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China
    2. Chegxin lithium,Chengdu 610200,China
    3. Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining 810008,China
  • Received:2022-09-06 Published:2023-06-10 Online:2023-06-14

摘要:

通过高温固相合成法制备了高纯和工业级60%NaNO3-40%KNO3二元熔盐。采用热失重法对60%NaNO3-40%KNO3二元熔盐长时间热循环稳定性进行了考察,数据显示高纯二元熔盐失重远远小于工业级二元熔盐,解析了工业级二元熔盐易分解机理。通过阿基米德法、旋转法、差示扫描量热法和激光闪光法分别测定了高纯和工业级60%NaNO3-40%KNO3二元熔盐的密度、黏度、热熔和热扩散系数,并对数据进行分析及拟合,获得了密度等性质随温度的变化关系。结果表明高纯60%NaNO3-40%KNO3二元熔盐与工业级60%NaNO3-40%KNO3二元熔盐相比,密度、黏度、热熔及热导率都有所降低,具有较好的热物性。

关键词: 60%NaNO3-40%KNO3二元熔盐, 纯度, 热稳定性, 热物性

Abstract:

The high purity and industrial grade 60%NaNO3-40%KNO3(binary molten salt) were prepared by high temperature solid state method.Long time thermal cycling of 60%NaNO3-40%KNO3(binary molten salt) was measured by thermogravimetric method.It was shown that the weight loss of high purity binary molten salt was far less than industrial grade.The decomposition mechanism of binary molten salt was discussed.The density,viscosity,heat capacity and thermal diffusion coefficient of high purity and industrial grade 60%NaNO3-40%KNO3(binary molten salt) were determined by archimedean method,differential scanning calorimetry method,rotational coaxial cylinder method and laser flash method.And the data was analyzed and fitted to obtain the relationship between density and other properties with temperature changes.It was demonstrated that density,viscosity,heat capacity,and thermal conductivity of high purity binary molten salt were lower than industrial grade,which possessed good thermo-physical properties.

Key words: 60%NaNO3-40%KNO3 binary molten salt, purity, thermal stability, thermo-physical properties

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