SiO_(2)微粉加入量对β-SiAlON-SiC材料性能的影响  

Influence of silica fume addition on properties of β-SiAlON-SiC material

作　　者：曹会彦[1] 郑翰 钱凡[1] 吴吉光[1] 万龙刚[1] 马昭阳 Cao Huiyan;Zheng Han;Qian Fan;Wu Jiguang;Wan Longgang;Ma Zhaoyang(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China;不详)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2023年第2期121-124,共4页Refractories

基　　金：国家重点研发计划(2017YFB0304000);中原千人计划-中原科技创新领军人才(204200510011)。

摘　　要：在保证承烧锂电池三元正极材料匣钵用β-SiAlON-SiC材料抗碱性的前提下,以SiC颗粒和细粉、Si粉、Al粉、α-Al_(2)O_(3)微粉等为原料,采用高温氮化法制备β-SiAlON-SiC材料,研究了SiO_(2)微粉加入量(外加质量分数分别为0、1%、2%、3%)对β-SiAlON-SiC材料的显气孔率、体积密度、常温抗折强度、高温抗折强度、物相组成、抗碱性的影响。结果表明:1)在β-SiAlON-SiC材料中添加SiO_(2)微粉可以降低其显气孔率,显著提高其常温抗折强度和高温抗折强度;2)添加SiO_(2)微粉不会影响Si粉和Al粉的氮化效果,但会影响Al_(2)O_(3)在Si_(3)N_(4)中的固溶度和β-SiAlON的生成量;3)SiO_(2)微粉的最优添加量为1%(w),所得试样的抗碱性明显优于未添加SiO_(2)微粉试样的。Under the premise of keeping good alkali resistance of β-SiAlON-SiC material used as saggers for firing ternary cathode materials of lithium batteries,β-SiAlON-SiC materials were prepared with SiC particles and fine powder,Si powder,Al powder and α-Al_(2)O_(3) micropowder as starting materials by the high temperature nitridation method.The influences of the silica fume addition(0,1%,2%,and 3%,extra adding,by mass) on the apparent porosity,the bulk density,the cold modulus of rupture,the hot modulus of rupture,the phase composition and the alkali resistance were researched.The results show that:(1)the silica fume addition reduces the apparent porosity,and increases the cold modulus of rupture and the hot modulus of rupture greatly;(2)the silica fume addition does not affect the nitridation of Si powder and Al powder,while impedes the solid solubility of Al_(2)O_(3) in Si_(3)N_(4) and the formation of β-SiAlON;(3)the optimal silica fume addition is 1% and the obtained sample has much better alkali resistance than that without silica fume.

关 键 词：Β-SIALON SiC SiO_(2)微粉 抗碱性 正极材料 匣钵 

分 类 号：TQ175[化学工程—硅酸盐工业]