CA_2-MA复相材料的合成与性能研究  

Study on Synthesis and Performance of CA_2-MA Composites

作　　者：罗琼[1] 顾华志[1] 李正坤 黄奥[1] 张家勤 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,武汉430081 [2]江苏晶鑫高温材料有限公司,扬州225200

出　　处：《硅酸盐通报》2012年第6期1631-1635,1640,共6页Bulletin of the Chinese Ceramic Society

基　　金：湖北省自然科学基金重点项目(2011CDA053);国家973计划前期研究专项(2012CB722702)

摘　　要：以白云石和工业氧化铝为原料,利用热力学对混合料反应过程进行分析,研究了不同Al2O3含量和烧成温度对CA2-MA复合材料的合成与性能的影响。结果发现:材料经1700℃下煅烧后可获得以CaAl4O7和MgAl2O4为主要物相的复相材料。随着配料中Al2O3含量的增加,材料中CaAl4O7含量减少,CaAl1 2O1 9含量增多,且材料显气孔率升高,体积密度略有下降。烧成温度从1600℃提高到1750℃,材料的体积密度增大,显气孔率降低,但温度过高反而有碍烧结,并对高温性能不利。CA2-MA composites were synthesized with staring materials of dolomite and commercial alumina.Thermodynamics analysis indicated the reaction process of mixture.Effect of different content of Al2O3 and sintering temperature on the synthesize and properties of the material were studied.The results showed the main phase of material were CaAl4O7 and MgAl2O4 after firing at 1700 ℃.With increasing the content of Al2O3,CaAl12O19 began to appear,accompanied by the apprent porosity increased and the bulk density increased slightly.With the firing temperature rising from 1600 ℃ to 1750 ℃,there was much increased in bulk density,but excessive temperature may hindered the sinter process and injured the high temperture performance.

关 键 词：二铝酸钙 镁铝尖晶石 显微结构 相组成 烧结性能 

分 类 号：TB33[一般工业技术—材料科学与工程]