Effect of SiO2 nanoparticles on specific heat capacity of low-melting-point eutectic quaternary nitrate salt
Effect of SiO2 nanoparticles on specific heat capacity of low-melting-point eutectic quaternary nitrate salt
复制标题
纳米SiO2对低熔点共晶硝酸季盐比热容的影响
DOI：
10.1016/j.solmat.2018.01.014
复制
发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Chongfang Ma
中科院分区：
文献类型：
--
作者：
Weilong Song;Yuanwei Lu;Yuting Wu;Chongfang Ma
为了研究纳米粒子对低熔点共晶硝酸盐比热容的影响，在Ca（NO3）2. 4 H2O-KNO 3-NaNO 3-LiNO 3混合盐中掺入了平均粒径为20 nm、质量分数为1.0%的SiO2纳米粒子。研制了一种用于制备熔盐纳米流体的机械分散混合器。使用差示扫描量热仪分析了混合时间（15，45，90，120和150分钟）和搅拌速率（600，750和1000 rpm）对纳米流体比热容的影响。结果表明，纳米流体的比热容随混合时间和搅拌速率的变化而变化。在15 min的混合时间和750 rpm的搅拌速率下，其增加约17.0%。熔融盐纳米复合材料的微观结构表征进行了使用扫描电子显微镜，这表明，特殊的纳米结构，类似链状纳米结构，形成在固体纳米流体的表面上。具有大比表面积和高表面能的特殊纳米结构可以提高熔盐纳米流体的比热容。
In order to evaluate the effect of nanoparticles on the specific heat capacity of a low-melting-point eutectic quaternary nitrate salt, 1.0 wt% SiO2nanoparticles with an average size of 20 nm was doped into the mixed salt Ca(NO3)2·4H2O-KNO3-NaNO3-LiNO3. A mechanical dispersion mixer was developed to prepare molten salt nanofluids. The effects of the mixing time (15, 45, 90, 120, and 150 min) and stirring rate (600, 750, and 1000 rpm) on the specific heat capacity of the nanofluids were analyzed using a differential scanning calorimeter. The results showed that the specific heat capacity of the nanofluids varied with the mixing time and stirring rate. It increased by ~ 17.0% at a mixing time of 15 min and stirring rate of 750 rpm. Microstructural characterization of the molten salt nanocomposites was performed using scanning electron microscopy, which showed that special nanostructures, which resemble chain-like nanostructures, were formed on the surface of the solid nanofluids. The special nanostructures with a large specific surface area and high surface energy could increase the specific heat capacity of the molten salt nanofluids.
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影响因子：
--
作者：
Chieruzzi M;Cerritelli GF;Miliozzi A;Kenny JM
通讯作者：
Kenny JM
DOI：
10.2172/6273418
发表时间：
1992-04
期刊：
--
影响因子：
--
作者：
D. Brown;J. Lamarche;G. E. Spanner
通讯作者：
D. Brown;J. Lamarche;G. E. Spanner
DOI：
10.1016/j.ijheatmasstransfer.2014.02.066
发表时间：
2014-07-01
影响因子：
5.2
作者：
Shin, Donghyun;Banerjee, Debjyoti
通讯作者：
Banerjee, Debjyoti
DOI：
10.1016/j.ijheatmasstransfer.2012.10.062
发表时间：
2013-02-01
影响因子：
5.2
作者：
Tiznobaik, Hani;Shin, Donghyun
通讯作者：
Shin, Donghyun
影响因子：
6.9
作者：
Nan Ren;Yu-ting Wu;Chong-fang Ma;Lixia Sang
通讯作者：
Nan Ren;Yu-ting Wu;Chong-fang Ma;Lixia Sang