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Entrapped Gas Effect in the Fast Firing of Yttria‐Doped Zirconia
Author(s) -
Kim DoHyeong,
Kim Chong Hee
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb07865.x
Subject(s) - sintering , materials science , calcination , cubic zirconia , yttria stabilized zirconia , doping , microwave , composite material , chlorine , mineralogy , chemical engineering , metallurgy , ceramic , chemistry , biochemistry , physics , optoelectronics , quantum mechanics , engineering , catalysis
Compared to conventional sintering of Y 2 O 3 ‐doped ZrO 2 using a slow heating rate of 10°C/min, microwave sintering and fast firing using a rapid heating rate of about 500°C/min resulted in lower final sintered densities. It is attributed to the residual chlorine in commerical zirconia powders manufactured by the chloride process. By calcining at 1100°C for 1 h to remove residual chlorines from the powder compacts, near full densities (>99% of theoretical) could be obtained by both fast firing and microwave sintering.