Entrapped Gas Effect in the Fast Firing of Yttria-Doped Zirconia |
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Authors: | Do-Hyeong Kim Chong Hee Kim |
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Affiliation: | Department of Ceramic Science and Engineering, Korea Advanced Institute of Science and Technology, Taejon, 305-701 Korea |
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Abstract: | Compared to conventional sintering of Y2O3-doped ZrO2 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. |
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Keywords: | zirconia yttria microwaves firing chlorine |
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