发泡剂在发泡陶瓷保温板中发泡原理的研究  

Research of Foaming Mechanism of Foaming Agent in Foam Ceramic Insulation Board

作　　者：邓坚勇 胡丽芳 罗淑芬 林志江 

机构地区：[1]佛山市溶洲建筑陶瓷二厂有限公司,佛山528000

出　　处：《佛山陶瓷》2017年第1期34-36,共3页Foshan Ceramics

摘　　要：本文通过研究发泡陶瓷保温板的TG-DSC曲线,分析SiC-MgCO_3-Li_2CO_3系发泡剂在烧结过程中的发泡原理,得出发泡剂主要是在高温时通过发生分解和氧化等化学反应放出大量气体,此时坯体产生部分液相,在气体的表面张力作用下形成均匀封闭的微细气孔,最终形成了具有低导热系数的发泡陶瓷保温材料。The TG-DSC curve of foam ceramic insulation board was studied. The foaming principle of the SiC-MgCO3-Li2CO3 foaming agent in the sintering was researched. The results showed that the foaming agent could release a large amount of gas during the decomposition and oxidation reaction at high temperature. At the same time liquid phase appeared. The liquid phase formed even closed Micro-porosity under the action of The surface tension of the gas. Eventually a insulation foam ceramic material with a low coefficient of thermal conductivity was obtained.

关 键 词：SiC—MgCO3-Li2CO3系发泡剂 TG—DSC曲线 发泡原理 化学反应 

分 类 号：TQ174.75[化学工程—陶瓷工业]