摘要
采用聚丙烯酸铵(PAA-NH_4)和聚乙烯吡咯烷酮(PVP)作为分散剂制备氧化锆陶瓷悬浮液,通过粘度测试考察了单分散剂、混合分散剂及混合添加模式对陶瓷悬浮液流变性能的影响,通过FTIR分析了分散剂在陶瓷颗粒表面的吸附状态,并简要探讨了分散剂的分散机理。结果表明:同时添加1wt.%PAA-NH_4和1wt.%PVP时,固相含量为20vol%、pH为9.0的氧化锆陶瓷具有更低的粘度;FTIR分析发现PAA-NH_4与PVP之间可能产生缔合作用。
Ammonium polyacrylate （PAA-NH,） and polyvinylpyrrolidone （PVP） were used as dispersants for the preparation of ZrO2 aqueous suspensions. The effect of single dispersant, mixing dispersants and addition mode on the rheology of ZrO2 aqueous suspensions was investigated by viscosity measurement. Then the adsorption of dispersants on the particle surface and the dispersion mechanism were briefly discussed by FTIR. The results showed that the solid content of 20vol.% and pH 9.0 of 3YSZ suspensions with co-addition of 1wt.% PAA- NH, and 1wt.% PVP obtained much lower viscosity, and there may be complexation between PAA-NH4 and PVP.
出处
《陶瓷学报》
CAS
北大核心
2016年第6期621-625,共5页
Journal of Ceramics
基金
国家863项目(2006AA032443)
关键词
添加模式
氧化锆悬浮液
流变性
分散机理
addition mode
zirconia suspension
rheology
dispersion mechanism
