β-赛隆(Sialon)/刚玉复相耐火材料研究  

β-Sialon/Corundum Composite Refractories by Nitridation Sintering Process

作　　者：李亚伟[1] 李楠[1] 王斌耀 刘静[2] 陈方玉[2] 

机构地区：[1]武汉科技大学高温结构陶瓷研究所,武汉430081 [2]武汉钢铁(集团)公司技术中心,武汉430080

出　　处：《无机材料学报》2000年第4期612-618,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金资助项目!(59474006);冶金部科技司资助项目

摘　　要：采用氮化反应烧结工艺制备β－Ｓｉａｌｏｎ／刚玉复相耐火材料．结果表明，在低于１４５０～１６００℃下的流动氮气气氛中直接氨化反应一定比例的ＡＩ、Ｓｉ、Ａｌ_２Ｏ_３微粉，以及刚玉细粉和颗粒，可以制备不同Ｚ值的β－赛隆（Ｓｉ_（６－ｚ）Ａｌ_ｚＯ_ｚＮ_（８－ｚ））／刚玉复相材料．但是，最终产物中的β－赛隆相的Ｚ值与设计值存在偏差，这可能与反应过程有关。不同Ｚ值的β－赛隆／刚玉复相材料均显示良好的抗渣铁侵蚀性．同时抗碱试验表明；当预设计Ｚ值为１．５～２．５时具有良好的抗碱性能，而当预设计Ｚ值等于４时，抗碱性下降，这可能与复相材料中Ｓｉａｌｏｎ含量及其Ｚ值有关．β-Sialon/corundum composite refractories were prepared by using Al, Si metal powders, Al_2O_3 fine powder, and corundum aggregates as raw materials at the temperatures lower than 1600℃ by nitridation sintering process. It shows that β-Sialon (Si_(6-z)Al_zO_zN_(8-z)), corundum, 15R phase appear in all the resultant products different in the contents of β-Sialon, 15R and the Z value of β-Sialon, even though only β-Sialon and corundum phases are expected in designed materials. And the Z value of the produced β-Sialon is deviated from the designed value. Such facts were supposed to be related to the reaction progress. Additionally, these β-Sialon/corundum composite refractories were tested by alkali, molten slag and steel. The results show that composite refractories of β-Sialon with Z=1.5～2.5 have good alkali resistance and all of the composite refractories have good molten slag and steel resistance.

关 键 词：赛隆 刚玉 耐火材料 氮化 烧结 复相 性能 

分 类 号：TQ175.14[化学工程—硅酸盐工业] TQ175.65