| 无机盐/陶瓷基复合蓄热材料高温稳定性的研究 |
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| 引用本文： | 李爱菊,王毅.无机盐/陶瓷基复合蓄热材料高温稳定性的研究[J].材料导报,2011,25(12):78-81. |
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| 作者姓名： | 李爱菊 王毅 |
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| 作者单位： | 1. 华南师范大学化学与环境学院,广州,510631
2. 仲恺农业技术学院机电工程系,广州,510225 |
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| 摘 要： | 通过理论分析和XRD、DSC及传统热分析等实验手段研究了新型无机盐/陶瓷基复合蓄热材料的高温稳定性。结果表明,相变材料Na2SO4在1000℃高温下具有热力学稳定性,适合作为复合材料的相变介质;Na2SO4/SiO2复合蓄热材料具有良好的高温热稳定性,经100次热循环后,其热失重率低于1.26%、潜热值降低约6.19%、相变温度基本保持恒定,且熔化-凝固特性和热震稳定性良好。Na2SO4/SiO2复合材料适合作为工业炉高温蓄热器储能用蓄热材料。
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| 关 键 词： | Na2SO4 SiO2 相变 高温稳定性 |
Study on the High Temperature Stability of Salt/Ceramic Composite Heat Storage Material |
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| LI Aiju,WANG Yi.Study on the High Temperature Stability of Salt/Ceramic Composite Heat Storage Material[J].Materials Review,2011,25(12):78-81. |
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| Authors: | LI Aiju WANG Yi |
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| Affiliation: | LI Aiju1,WANG Yi2(1 School of Chemistry and Environment,South China Normal University,Guangzhou 510631,2 Department of Mechanicand Electronic Engineering,Zhongkai University of Agriculture and Technology,Guangzhou 510225) |
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| Abstract: | The high temperature stabilities of salt/ceramic composite heat storage material Na2SO4/SiO2 were studied by theoretical analysis,XRD and DSC.Theoretical analysis shows that Na2SO4 has good thermodynamic stability at 1000℃ and is very suitable as the phase change material.The experimental results indicate that the compo-site heat storage material Na2SO4/SiO2 has good high temperature stabilities: after 100 thermal cycles,thermal weight loss rate is lower than 1.26%,the latent heat slightly decreases(<6.19%),the phase change temperature maintaines the constant,and the melt-solidification and the thermal shock resistance are very good.The composite material Na2SO4/SiO2 is suitable as the heat storage material of the high temperature heat accumulator. |
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| Keywords: | Na2SO4 SiO2 phase change high temperature stability |
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