氧化温度和分散剂种类对Si_(3)N_(4)浆料性能的影响  

Effect of oxidation temperature and dispersant type on properties of Si_(3)N_(4) slurry

作　　者：孙易桀 马妍[1] 王周福[1] 刘浩[1] 何健 吕戌生 王玺堂[1] Sun Yijie;Ma Yan;Wang Zhoufu;Liu Hao;He Jian;Lyu Xusheng;Wang Xitang(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]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 [2]江苏晶鑫新材料股份有限公司,江苏宜兴225000

出　　处：《耐火材料》2022年第1期24-28,共5页Refractories

基　　金：国家自然科学基金资助项目(U20A20239,51672195)。

摘　　要：研究了自蔓延燃烧合成Si_(3)N_(4)粉的氧化处理(在空气气氛中分别于400、600、800℃保温3 h)以及添加的分散剂种类(分别为聚丙烯酸钠、六偏磷酸钠、三聚磷酸钠、木质素磺酸钙)对制备的Si_(3)N_(4)浆料的抗沉降性、ζ电位和黏度的影响。结果表明:1)在空气气氛中于800℃保温3 h氧化处理后,粉体中Si_(2)N_(2)O含量增多;用其制备的浆料的稳定性最好,ζ电位绝对值较大,黏度最小。2)以六偏磷酸钠作为分散剂制备的Si_(3)N_(4)浆料的稳定性较好,ζ电位绝对值最大,黏度最小。3)添加0.021%(w)六偏磷酸钠制备的Si_(3)N_(4)浆料的ζ电位绝对值最大,黏度较小。The effects of the oxidation treatment(in air atmosphere at 400,600 and 800℃for 3 h)of Si_(3)N_(4) powder synthesized by self-propagating combustion and the types of dispersants(sodium polyacrylate,sodium hexametaphosphate,trimerization sodium phosphate,and calcium lignosulfonate)on the anti-settling,the zeta potential and the viscosity of the Si_(3)N_(4) slurries were investigated.The results show that:(1)after the oxidation treatment in air atmosphere at 800℃for 3 h,the Si_(2)N_(2)O content in the obtained powder increases;the corresponding slurry has the best stability,large zeta potential absolute value and the smallest viscosity;(2)the Si_(3)N_(4) slurry prepared with sodium hexametaphosphate as dispersant has good stability,the highest zeta potential absolute value and the lowest viscosity;(3)the Si_(3)N_(4) slurry prepared with 0.021%sodium hexametaphosphate has the highest zeta potential absolute value and low viscosity.

关 键 词：自蔓延燃烧合成 氮化硅 浆料 稳定性 抗沉降性 Ζ电位 黏度 氧化温度 分散剂 

分 类 号：TQ127.2[化学工程—无机化工]