硝酸钠/硅藻土复合相变材料的制备与热性能研究  

Study on Preparation and Thermal Properties of NaNO_3/Diatomite Composite Phase Change Material

作　　者：钟丽敏[1] 

机构地区：[1]国家知识产权局专利局专利审查协作广东中心,广东广州510530

出　　处：《广东化工》2017年第15期102-105,共4页Guangdong Chemical Industry

基　　金：国家重点基础研究发展计划(973计划)(2012CB720400);国家自然科学基金面上项目(51272028)

摘　　要：采用溶液浸渍法制备出硝酸钠/硅藻土复合相变材料,并采用扫描电子显微镜(SEM)、X射线衍射(XRD)、差示扫描量热法(DSC)分别对其形貌、成分、相变性能进行表征;同时对该复合相变材料的热稳定性进行探讨。DSC结果显示,硝酸钠/硅藻土复合相变材料的熔点(Tm)是305℃,凝固点(Tc)是299.7℃,熔融焓(ΔHm)和凝固焓(ΔHc)分别是94.1 J/g和94.3 J/g。热稳定性测试显示硝酸钠/硅藻土复合相变材料经过热循环后仍然保持了良好的热稳定性。A novel composite phase change material, NaNO3/diatomite, was prepared for thermal storage by solution impregnation method. The prepared NaNO3/diatomite composite was characterized by the scanning electron microscope （SEM） and X-ray diffraction（XRD）. Thermal storage property of NaNO3/diatomite was studied by differential scanning calorimetry （DSC）. DSC results show that the melting point （Tm） and the freezing point （Tc） of NaNO3/diatomite were 305.0 ℃ and 299.7 ℃, and the latent heats of melting and freezing were 94.1 and 94.3 J/g, respectively. Thermal reliability tests presented that the prepared NaNO3/diatomite possessed excellent thermal stability after thermal cycling.

关 键 词：相变材料 硅藻土 硝酸钠 储热性能 

分 类 号：TB34[一般工业技术—材料科学与工程]