摘要
以MgO和SiO2为原料,以Na Cl-KCl混合盐为相变材料,通过原位反应烧结法制备了熔盐/镁橄榄石基复合相变蓄热材料。研究了烧结温度、熔盐含量对材料的物理性能、物相组成、导热性能及蓄热性能的影响。结果表明:800℃下即可通过原位反应烧结法制备出具有一定强度的熔盐/镁橄榄石基复合相变蓄热材料;烧结温度为1000℃,熔盐含量为40%时,能制备出相变潜热为80.1 k J/kg,蓄热密度达263.19 k J/kg（ΔT=100℃）的复合相变蓄热材料,且制备出的复合材料在400800℃时的导热系数为0.430.37 W/（m·K）。
Molten salt/forsterite-based composite phase change heat storage materials were prepared by the in-situ reaction sintering method, using magnesia and silica as the forsterite ceramic substrate raw materials and complex salt of Na Cl-KCl as phase change materials. The influences of sintering temperatures and molten salt contents on the properties of heat storage materials were discussed. The results indicate that molten salt/forsterite-based composite phase change heat storage materials could be prepared by in-situ reaction sintering at 800 ℃, and the prepared materials have better energy storage performance with phase change latent heat of 80.1 k J/kg and heat storage density of 263.19 k J/kg with molten salt content of 40% sintered at 1000 oC(ΔT=100 oC). Furthermore, the thermal conductivity of the prepared materials is 0.43~0.37 W/(m·K) at 400~800 oC.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第S1期515-519,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51474166)
国家科技支撑计划(2013BAE03B01)
湖北省自然科学基金重点项目(2012FFA102)
关键词
熔盐
镁橄榄石
相变材料
蓄热性能
molten salt
forsterite
phase change materials
heat storage performance
