高纯莫来石原料合成工艺研究  

Study on synthesis of high purity mullite material

作　　者：杜晶[1] 薛群虎[1] 刘世聚 周永生[1] 范建超 

机构地区：[1]西安建筑科技大学材料科学与工程学院,西安710055 [2]郑州豫兴耐火材料有限公司

出　　处：《耐火材料》2006年第2期114-116,132,共4页Refractories

摘　　要：利用工业氧化铝与煤系轻烧高岭土或高纯石英砂为原料合成高纯莫来石,研究了添加剂(分别为滑石、ZnO和锆英砂)、合成温度、工艺过程对莫来石相含量及体积密度的影响。采用XRD定量分析的K值法计算出莫来石相的含量。结果表明:用工业氧化铝与煤系高纯高岭土合成出的莫来石相含量高于用石英砂与工业氧化铝合成的试样,在其中加入1%ZnO和1%锆英砂作添加剂的试样(其w(Al2O3)=68%),在氧化气氛下采用1380℃3h和1580℃3h二次保温煅烧工艺,合成的莫来石相含量达到97%,体积密度达到2.89g·cm-3。High purity mullite was synthesized with industrial alumina and light-burned kaolinite. The influences of additives such as steatite,ZnO and zircon,temperature and synthesizing process on mullite phase content and bulk density were researched. The K calculating method by XRD was adopted to calculate the content of mullite phase. The results show that content of mullite phase synthesized with industrial alumina and light-burned kaolinite is higher than that synthesized with industrial alumina and quartz sand. With the latter method, in oxidizing atmosphere by adding 1% ZnO and 1% ZrSiO4 and soaking at 1380℃ for 3 h and 1580 ℃ for 3 h respectively, the mullite phase content reached 97%, with bulk density of 2.89 g ·cm^-3.

关 键 词：高纯莫来石 莫来石含量 体积密度 添加剂 

分 类 号：TQ174.42[化学工程—陶瓷工业] TQ174.759[化学工程—硅酸盐工业]