Compaction and Sintering Behaviour of Zirconia Powders: I. Compaction Response

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J. Korean Ceram. Soc. > Volume 29(6); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(6): 489.

지르코니아 분말의 치밀화와 소결거동 : I. 가압에 따른 치밀화 응답

박홍채, Frank L. Riley¹

부산대학교 무기재료공학과
¹영국 리즈대학교 요업과

Compaction and Sintering Behaviour of Zirconia Powders: I. Compaction Response

ABSTRACT

The continuous compaction response of zirconia powders prepared by different processing treatments was investigated. Though the yield point could be or not below 1 MPa, the change of slope was always observed at high pressure range around 60 MPa. Powder compaction was mainly governed by second compaction stage and compaction rate was decreased with increasing forming pressure. Rotary vacuum dried powder favored a high compaction density, whereas freeze dried and calcined powders favored an increase in the pressing efficiency. In order to extract more reliable information about powder compaction, it was necessary to use not only compaction response diagram but also compaction rate diagram.