摘要
以Al-Si共晶合金为相变材料,白刚玉粉为陶瓷基体原料,用混合烧结法制备了Al-Si/Al2O3高温复合相变蓄热材料。通过对复合相变蓄热材料金相显微观察,DSC热分析,蓄热密度和导热系数的计算,结果表明,制备的高温复合相变蓄热材料具有良好的蓄热能力和快速蓄放热能力;对复合材料进行300次热循环试验后,其质量损失为0.84%,潜热值降低4.23%,相变温度略有升高,该复合材料的热稳定性良好。
Al-Si/Al2O3 high temperature composite phase change energy storage materials was prepared by hybrid sintering method using white corundum powder as spinel ceramic substrate raw materials and Al-Si eutectic alloy as phase change materials. DSC thermal analysis was used to measure material latent heat, heat storage density and the thermal conductivity of phase change material were also calculated. The results show that the prepared materials have better energy storage performance and capability of rapid heat storage and release. After 300 thermal cycles, the mass of composite phase change material loss is lower than 0.84%. The latent heat slightly decreases by 4.23%. The phase change temperature maintains the constant. The Al-Si/Al2O3 composite has an excellent thermal stability.
出处
《热加工工艺》
CSCD
北大核心
2012年第8期72-74,78,共4页
Hot Working Technology
关键词
混合烧结
相变潜热
热稳定性
hybrid sintering method
latent heat
thermal stability
