SiC粉体表面氧化层的活化与其浆料流变性研究  

Activation of Oxide Layer on the Surface of SiC Powder and Its Slurry Rheology

作　　者：李娟娟 高晓莹 宋丽岑 胡葆华 高原[1] LI Juanjuan;GAO Xiaoying;SONG Licen;HU Baohua;GAO Yuan(Chemistry and Chemical Engineering College,Yantai University,Yantai 264005,China;China Energy Conservation Valiant Co.,Ltd,Yantai 264000,China)

机构地区：[1]烟台大学化学化工学院,烟台264005 [2]中节能万润股份有限公司,烟台264000

出　　处：《中国陶瓷》2023年第10期50-55,共6页China Ceramics

基　　金：烟台先进材料与绿色制造山东省实验室应用技术开放课题项目(AMGM2021A06)。

摘　　要：SiC粉体表面SiO_(2)氧化层对其浆料粘度、流变性产生的影响一直是胶态成型技术关注的问题。采用NaOH、KOH和Na_(2)CO_(3)三种不同强度的碱性溶液对SiC粉体进行处理,考察碱性溶液对SiO_(2)氧化层的活化以及对粉体分散稳定性产生的影响。Zeta电位测试表明,中性时Na_(2)CO_(3)处理后粉体表面的电位绝对值比酸洗粉体提高了16.8 mV,pH值为10时达到67.8 m V。所制备固相含量为35 vol%的浆料,粘度低、稳定性好。因此,适度活化SiC粉体表面氧化层有助于改善浆料的流变性能。The influence of SiO_(2)oxide layer on the viscosity and rheology of SiC powder has always been a concern of colloidal molding technology.In this paper,three alkaline solutions of NaOH,KOH and Na_(2)CO_(3)were used to treat the SiC powder,and the activation of SiO_(2)oxide layer and the dispersion stability of powder were investigated.Zeta potential test showed that the absolute potential of powder surface after Na_(2)CO_(3)treatment was 16.8 mV higher than that of the pickling powder at neutral,and reached 67.8 mV at pH 10.The prepared slurry with 35 vol%solid content has low viscosity and good stability.Therefore,moderate activation of the oxide layer on the surface of SiC powder helps to improve the rheological properties of slurry.

关 键 词：SIC粉体 氧化层 Na_(2)CO_(3) 浆料 流变性 

分 类 号：TQ174.758.12[化学工程—陶瓷工业]