氧化硼对Al_(2)O_(3)-SiC-C质浇注料力学性能的影响  

Effect of boron oxide on mechanical properties of Al_(2)O_(3) - SiC - C castables

作　　者：邵荣丹[1] 鞠茂奇 程水明[1] 夏昌勇[1] 李旭治 张寒[2] 单江博 Shao Rongdan;Ju Maoqi;Cheng Shui-ming;Xia Changyong;Li Xuzhi;Zhang Han;Shan Jiangbo(不详;Wuhan Research Institute of Metallurgy Construction Co.,Ltd.of MCC Group,Wuhan 430081,Hubei,China)

机构地区：[1]中冶武汉冶金建筑研究院有限公司,湖北武汉430081 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [3]瑞泰马钢新材料科技有限公司,安徽马鞍山243000

出　　处：《耐火材料》2024年第3期230-233,共4页Refractories

基　　金：辽宁省“揭榜挂帅”科技计划重点项目(2022JH1/10800005)。

摘　　要：为了利用氧化硼“间接烧结”特性,进一步提升Al_(2)O_(3)-SiC-C质浇注料的力学性能,以氧化硼(≤0.075 mm)为助烧剂,制备了以FM60莫来石颗粒、致密刚玉、碳化硅、α-Al_(2)O_(3)微粉等为主要原料的浇注料,探究了氧化硼细粉加入量(加入质量分数分别为0、0.2%、0.4%和0.6%)对Al_(2)O_(3)-SiC-C质浇注料结构与性能的影响。结果表明,添加氧化硼细粉会显著提升浇注料的加水量,但其有利于晶须状莫来石的生成,从而加强骨料和基质间的结合强度,试样的力学性能得到明显提升。但当氧化硼细粉加入量提高至0.6%(w)时,试样中莫来石晶须长径比减小,试样的强度降低。综合以上结果,氧化硼最佳加入量为0.4%(w)。To further improve their mechanical properties by utilizing the indirect sintering characteristics of boron oxide,Al_(2)O_(3)-SiC-C castables were prepared with mullite particles FM60,dense corundum,silicon carbide andα-Al_(2)O_(3) micropowder as main raw materials and boron oxide(≤0.075 mm)as the sintering aid.The effect of the boron oxide fine powder addition(mass fractions of 0,0.2%,0.4%and 0.6%,respectively)on the structure and properties of the castables was investigated.The results show that adding boron oxide fine powder significantly increases the water demand of the castables,but it is beneficial for the formation of mullite whiskers,thereby strengthening the bonding between the aggregates and the matrix and significantly improving the mechanical properties of the samples.However,when the addition of boron oxide fine powder increases to 0.6%,the sample presents decreased length to diameter ratio of mullite whiskers and lower strength.Generally,the optimal boron oxide addition is 0.4%.

关 键 词：Al_(2)O_(3)-SiC-C质 浇注料 氧化硼 莫来石晶须 

分 类 号：TQ175[化学工程—硅酸盐工业]