陶瓷隔热瓦的缺陷修补

摘要

Ceramic insulation tiles with defects were repaired by introducing high-temperature ceramic powders,such as MgO,YSZ,Al2O3 and tile matrix powders.The microstructure,mechanical property and thermal insulation properties of tile before and after repair were systematically investigated.The results show that the powder containing tile matrix powders is the best method to repair the ceramic insulation tile.The part of the complement has good compatibility with the body,and the micro morphology is similar to remain porous network structure.After repairing,the density,thermal conductivity at room temperature and compressive strength of the samples are 0.24 g/cm3,0.044 W/ (m·K) and 0.58 MPa,respectively.After 1 200℃ and 30 min heat treatment,the complement and the tile body have good bonding,cracks,depressions and other defects free.%分别采用了MgO、YSZ和Al2O3三种陶瓷粉体和一种含隔热瓦本体成分的粉料对陶瓷隔热瓦缺陷进行修补.研究了修补前后材料的微观形貌、力学及隔热性能.结果表明:采用含隔热瓦本体组成的粉料对陶瓷隔热瓦进行修补,修补部位与本体部位相容性好,且微观形貌相似,仍保持纤维搭接的多孔空间网络结构;修补后试样密度0.24 g/cm3、室温热导率0.044 W/(m· K)、压缩强度0.58 MPa;1 200℃、30 min热处理后,修补部位与本体部位结合性好,未出现裂纹、凹陷等缺陷,是有效的缺陷修补方法.