包铝铁红产品耐高温性能的研究

随着建筑材料行业的迅速发展和瓷质玻化砖的广泛应用，市场上对具有耐高温性质的铁红颜料需求很大，但是目前国产氧化铁红煅烧到800℃以上时会发生烧结和还原，严重影响了产品质量。通过比较原料铁红、包铝铁红和超声波分散后的包铝铁红3种产品之间的耐高温性能，得出结论：经过超声波搅拌分散15min后的包铝铁红产品，最高耐温可达1200℃，而且无烧结情况发生。通过观察铁红颗粒包覆Al2O3前后的TEM图片，发现Al2O3可以在铁红颗粒外面形成一层包膜，使粒子之间被包膜隔开，因此产品的耐烧温度被提高，而且不会烧结在一起。

Study on High Temperature Resistance Property of Iron Oxide Red Coated by Alumina

With the rapid development of the building material industry and the extensive application of the porcelain brick, the market requirement becomes increasingly larger for iron oxide red which has the performanee of high temperature resistance, but at present iron oxide red calcined above 800℃ is sintered and deoxidized and thus influenced the product quality heavily. Through comparing the high temperature resistance property of raw red iron oxide, one coated by alumina, and one coated by alumina after dispersed by ultrasonic wave at high temperature, the result was obtained that the latest product dispersed for 15min by ultrasonic wave was stable at 1 200℃ and it couldn＇t be sintered. By TEM of iron oxide red and one coated by alumina ,an alumina layer outside iron oxide red particles could be formed and these particles were separated, so the high temperature resistana property of the product could be increased and couldn＇t be sintered together.