Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication of Porous Yttria-Stabilized Zirconias Controlled by Additives

  • Paek, Yeong-Kyeun (Department of Materials Science and Engineering, Andong National University) ;
  • Oh, Kyung-Sik (Department of Materials Science and Engineering, Andong National University) ;
  • Lee, Hyuk-Jae (Department of Materials Science and Engineering, Andong National University)
  • Published : 2007.02.28
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Abstract

To fabricate a thick, porous yttria-stabilized zirconia without cracking and warping, a method for the simultaneous control of the porosity and shrinkage was designed. As a pore former, a potato starch was used. For the control of shrinkage the oxidation of Al metal particles was used. For the sintering of the above powder mixtures, a partial sintering technique was used at $1300^{\circ}C$ for 10 min in air. Upon adding the additives, high open porosity above 53% and a low shrinkage level were obtained. As a result cracking and warping of the sintered body were deterred. This outcome most likely resulted from the compensation of sintering shrinkage due to the volume expansion caused by oxidation of the Al metal particles during heat-treatment.

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