Rheological Properties and Gelcasting Behavior of Ultrafine ZrO2 Suspension
Ultrafine ZrO2 suspension with stable high solid loading was prepared,and ZrO2 ceramic materials with uniform structures were fabricated through gelcasting.Zeta potential of the ultrafine ZrO2 suspensions with A-type dispersant,triammonium citrate,and without dispersant was measured.The influencing factors on suspension flowability as the content of dispersant,pH value,solid loading,and milling time were studied in detail.And the optimum premixed solution/initiator (APS)/catalyst (TEMED) ratio for gelcasting was investigated.The results showed that A-type dispersant was suitable for dispersing of ultrafine ZrO2 particles in aqueous premixed solutions; the optimized content of dispersant was 2%~2.5% of ZrO2 volume; ZrO2 suspension displayed a minimum viscosity at pH 10.66; the upper limit of solid loading was 54vol.%; and the appropriate milling time was 12 hours.When premixed solution/initiator (APS)/catalyst (TEMED) ratio was 100/1/0.5,ZrO2 suspension has a better gelcasting behavior.
Rheological properties Dispersant ZrO2 Solid loading Gelcasting
Wang Jinfeng Gao Yachun Yang Xianfeng Sun Jialin Xie Zhipeng
School of Materials Science & Engineering,University of Science & Technology Beijing,Beijing 100083, School of Light Industry,Hebei Polytechnic University,Tangshan 063020,China Department of Materials Science & Engineering,State Key Lab of New Ceramics & Fine Processing,Tsingh School of Materials Science & Engineering,University of Science & Technology Beijing,Beijing 100083,
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
740-743
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）