Surface tension of quaternary bromide salts

SHI Jianfeng; XIONG Yaxuan; WU Yuting; LI Deying; MENG Qiang; MA Chongfang; CHEN Hongbing

doi:10.11949/j.issn.0438-1157.20150168

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Surface tension of quaternary bromide salts

更新时间：2025-12-10

- Surface tension of quaternary bromide salts
- CIESC Journal Issue 10, Pages: 3820-3825(2015)
- 作者机构：
  
  1. 北京建筑大学供热供燃气通风及空调工程北京市重点实验室,北京,100044
  2. 北京工业大学传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150168
  CLC： K124
- Online First：05 October 2015，
  
  Published：05 October 2015
- 稿件说明：
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SHI Jianfeng, XIONG Yaxuan, WU Yuting, et al. Surface tension of quaternary bromide salts[J]. CIESC Journal, 2015, (10): 3820-3825.
DOI：

SHI Jianfeng, XIONG Yaxuan, WU Yuting, et al. Surface tension of quaternary bromide salts[J]. CIESC Journal, 2015, (10): 3820-3825. DOI： 10.11949/j.issn.0438-1157.20150168.

摘要

表面张力的大小直接决定着熔盐的热传输能力。基于拉脱法测量表面张力的原理

改进了测量高温熔盐表面张力的实验系统;以化学纯LiNO3进行标定获得了仪器系数

然后分别以NaNO3和Solar salt混合盐验证了实验系统和拉脱法测量高温熔盐表面张力的可靠性。在此基础上

以KBr、LiBr、NaBr、CaBr2为基础配制了4种不同组分的混合溴化盐

测量了4种混合溴化盐在不同温度下熔体的表面张力

拟合得到了4种混合溴化盐表面张力随温度变化的实验关联式。实验结果表明4种混合溴化盐的表面张力随温度升高呈线性下降

与已知熔体表面张力随温度变化规律一致。

Abstract

Surface tension is one of the most important factors directly determining transmission capability of heat. An experimental system was improved to measure surface tension of high temperature molten liquid with pulling escape method derived from the du Noüy ring method. Instrument coefficient was calibrated with chemically pure LiNO3. By measuring surface tensions of NaNO3 and Solar salt (60% NaNO3

40% KNO3

mass fraction)

reliability of experimental system and method was validated. On this basis

four samples of quaternary bromide salts from KBr

LiBr

NaBr and CaBr2 were made with different mass ratios. Surface tensions of samples were measured with the experimental system in the temperature range 350—500℃ and fitted as functions of temperature. The results indicate that surface tension values of quaternary bromide salts diminish linearly with increasing temperature

in accord with surface tension change of known molten liquids.

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