原位反应烧结制备熔盐/尖晶石复合高温相变储能材料的研究

以电熔镁砂和白刚玉为镁铝尖晶石陶瓷基体原料,以氯化钾、氟化钾复合盐为相变材料,用原位反应烧结法制备熔盐/尖晶石复合高温相变储能材料,研究烧结温度、熔盐含量对熔盐/尖晶石相变储能材料性能的影响。采用XRD和SEM对材料进行表征,通过DSC分析测定材料相变潜热,结果表明,烧结温度为1 000℃和熔盐含量为40%时,所制备的储能材料的相变潜热为70.98 kJ/kg,蓄热密度为240 kJ/kg（ΔT=100℃）,储热性能较好。

Molten salt/spinel-based composite phase change heat storage materials prepared by in-situ reaction

Molten salt/spinel high-temperature composite phase change energy storage materials were prepared by in-situ reaction method using fused magnesia powder,white corundum powder as the spinel ceramic substrate raw materials and complex salt of potassium chloride,potassium fluoride as phase change materials.The influences of different sinter temperatures and molten salt contents on the performance of molten salt/spinel phase change energy storage materials were investigated.The materials were characterized by XRD and SEM,and DSC thermal analysis was used to measure material latent heat.The results show that the prepared materials have better energy storage performance,phase change latent heat of 70.98 kJ/kg,heat storage density of 240 kJ/kg（ΔT = 100 ℃） under the condition of sintering temperature at 1 000 ℃ and molten salt content at 40%.