无机盐/陶瓷基复合蓄热材料高温稳定性的研究  

Study on the High Temperature Stability of Salt/Ceramic Composite Heat Storage Material

作　　者：李爱菊[1] 王毅[2] 

机构地区：[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

出　　处：《材料导报》2011年第12期78-81,共4页Materials Reports

基　　金：国家自然科学基金(59876010)

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。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 Na2 SO4 has good thermodynamic sta- bility at 1000~C and is very suitable as the phase change material. The experimental results indicate that the compo-site heat storage material Naz SO4/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.

关 键 词：NA2SO4 SIO2 相变 高温稳定性 

分 类 号：TQ131.1[化学工程—无机化工]