Fabrication of Porous Zirconia Ceramics by Injection Molding Method
An innovative processing route for fabricating porous zirconia ceramics has been developed based on traditional injection molding method.Azodicarbonamide (AC) was used as the foaming agents and mixed with the zirconia powder and conventional binders (polypropylene,ethylene/vinyl acetate,paraffin wax and stearic acid).There were three stages in the foaming course:(1) Small bubbles nucleated when AC decomposed into N2 and CO in the barrel.(2) Viscosity and pressure drop led to the growth of the bubbles when the melt feedstock was injected into the die cavity.(3) The porous structure was kept in the solidified body.The AC content and injection parameters were optimized to control the pore density and size.The porous green body was debinded at the heating-up rate of 0.5 ℃/min to 450℃ and sintered at 1550℃.Samples with porosity of 40%-50% and pore sizes from 200-250am were prepared when the addition of AC was 0.3% by weight.The results showed that ceramic injection molding method was also suitable for fabricating the porous ceramics.
Porous ceramic Ceramic injection molding Zirconia
Xianfeng Yang Zhipeng Xie Linlin Wang
State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science & Engineering,Tsinghua University,Beijing 100084 P.R.China
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
758-761
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）