摘要
以石蜡为相变材料,Al粉为填料,制备出在红外波段具有较低辐射能量的复合相变材料,并对复合相变材料的结构、热性能和红外发射率进行了表征。结果表明:添加40%Al粉的石蜡基复合相变材料的红外发射率可低至0.2,此材料的相变温度是49.8℃,其相变潜热是121.47 J/g。采用试板法测试了相变材料石蜡控温效果,并将控温结果与理论计算相结合。计算结果表明,添加40%的Al粉得到的复合石蜡相变材料可以在理论上使其辐射能量至少降低85%。
The composite phase change materials（PCMs） with low infrared radiation energy was prepared by using paraffin and Al powder as phase change material and stuffing,respectively.The structure,thermal properties and the infrared emissivity（8～14 μm）of composite PCMs were systematically investigated.The results indicate that the phase-change temperature of composite PCMs is similar to that of paraffin,and that the latent heat of composite PCMs is equivalent to the calculated values based on the mass fraction of paraffin in the composite materials,and the infrared emissivity of composite PCMs with Wt40% Al powder can reach to 0.2.Controlling temperature effect of the composite PCMs was tested using plank method,and the above results were conbined with theoretical analysis.The results indicate that the composite PCMs with Wt 40% Al powder can decrease the radiation energy no less than 85%.
出处
《红外技术》
CSCD
北大核心
2010年第7期387-391,共5页
Infrared Technology
基金
国防科研计划项目
编号:51410040305HK0214
国家重点基础研究发展计划(973计划)资助项目
编号:XXXX03zt2-06-ZZT2
国家自然科学基金资助项目
编号:90505008
关键词
石蜡
相变材料
相变控温
低辐射能量
paraffin
composite phase change materials
control temperature
low infrared radiation energy
