摘要
以Al-Si合金粉为相变介质,高钙及低钙粉煤灰为基体材料,采用混合烧结法制备金属/陶瓷基高温定形复合相变材料,探讨两种粉煤灰及CaO含量对材料蓄热性能的影响。结果表明,由于高钙粉煤灰中具有助熔作用的CaO含量较高,降低了烧结过程中的熔融温度,使基体中出现大量封闭孔,故高钙粉煤灰复合相变材料具有增重率小、相变潜热高、存在单质Al等特性。低钙粉煤灰中外加CaO后,其增重率降低而相变潜热明显增加。当粉煤灰中CaO总含量控制在10%~15%时,复合相变材料的蓄热性能突出。
The metal/fly ash-based high temperature form-stable phase change material was prepared by mixed sintering method with Al-Si alloy powder as the phase change medium and fly ash(high calcium and low calcium)as the matrix material.The effects of the two kinds of fly ash and the content of calcium oxide on the heat storage performance were discussed.The results show that a large number of closed pores appear in the matrix because of the reducing of melting temperature by the high content of CaO in the high-calcium fly ash.Therefore,the composite phase change material with high-calcium fly ash has a small weight gained rate,high latent heat,and the existence of Al.When CaO is added to low calcium fly ash,the weight gained rate decreases and the latent heat increases obviously.The heat storage performance of the composite phase change material is outstanding when the total content of CaO in fly ash is controlled at 10%to 15%.
作者
关江哲
朱桂花
吕硕
康亚明
赵妤
GUAN Jiangzhe;ZHU Guihua;LYU Shuo;KANG Yaming;ZHAO Yu(College of Chemistry and Chemical Engineering,North Minzu University,Yinchuan 750021,China;Key Laboratory of Chemical Engineering and Technology,North Minzu University,Yinchuan 750021,China;College of Mechatronic Engineering,North Minzu University,Yinchuan 750021,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第9期3008-3013,3022,共7页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51666001)
宁夏低品位资源高值化利用及环境化工一体化技术创新团队项目(20170714)。
关键词
高钙固硫粉煤灰
低钙粉煤灰
定形复合相变材料
氧化钙
AL-SI合金
high calcium sulfur-fixed fly ash
low calcium fly ash
form-stable composite phase change material
calcium oxide
Al-Si alloy
作者简介
关江哲(1996-),男,硕士研究生。主要从事高温蓄热材料方面的研究。E-mail:1934912926@qq.com;通讯作者:朱桂花,教授。E-mail:2003062@nun.edu.cn。
