...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >Study on preparation and thermal properties of sodium nitrate/silica composite as shape-stabilized phase change material
【24h】

Study on preparation and thermal properties of sodium nitrate/silica composite as shape-stabilized phase change material

机译：形状稳定相变材料硝酸钠/二氧化硅复合材料的制备及热性能研究

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A sodium nitrate (NaNO3)/silica (SiO2) composite was prepared as a shape-stabilized phase change material by a sol-gel procedure. In this composite, NaNO3 acted as the phase change material and SiO2 was used as the supporting material. The maximal weight percentage of NaNO3 in the composite was determined to be 60 wt.%. The chemical composition, morphology, structure and thermal properties were investigated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), thermal gravimetric analysis (TGA), differential scanning calorimeter (DSC) and Laser thermal conductivity meter. The DSC results indicated that the enthalpies of melting and freezing of the NaNO3/SiO2 (60 wt.% NaNO3) composite were 108 kJ/kg and 110 kJ/kg, and the corresponding temperatures of the phase transition were 302 degrees C and 300 degrees C, respectively. In the temperature range of lower than 500 degrees C the phase change enthalpy of the composite was increased with the increase of the roasting temperature. (C) 2015 Elsevier B.V. All rights reserved.
机译：通过溶胶-凝胶法制备了作为形状稳定的相变材料的硝酸钠（NaNO3）/二氧化硅（SiO2）复合材料。在该复合材料中，NaNO3用作相变材料，SiO2用作支撑材料。确定复合物中NaNO 3的最大重量百分比为60重量％。通过傅里叶变换红外光谱仪（FT-IR），扫描电子显微镜（SEM），热重分析（TGA），差示扫描量热仪（DSC）和激光热导仪对化学成分，形态，结构和热性能进行了研究。 DSC结果表明，NaNO 3 / SiO 2（60重量％NaNO 3）复合材料的熔融和冻结焓为108kJ / kg和110kJ / kg，相应的相变温度为302℃和300℃。 C分别。在低于500摄氏度的温度范围内，复合材料的相变焓随焙烧温度的升高而增加。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号