Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Variation of Photoluminescence in Zirconia Gel by Pyrolysis

지르코니아 겔에서 열처리에 따른 광발광의 변화

  • Han, Kyu-Suk (Division of Materials Science and Engineering, Inha University) ;
  • Ko, Tae-Gyung (Division of Materials Science and Engineering, Inha University)
  • 한규석 (인하대학교 신소재공학부) ;
  • 고태경 (인하대학교 신소재공학부)
  • Published : 2008.02.29
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Abstract

In this study, we prepared zirconia gel by the sol-gel method and investigated its photoluminescence properties by varying pyrolysis temperature. The addition of acetic acid into a Zr-alkoxide solution resulted in forming the bidentate ligands with Zr ions and producing a stable gel. At the pyrolysis temperature of $350^{\circ}C$, the zirconia nanocrystals with tetragonal structure gradually appeared in the gel. The PL intensity of the zirconia gel increased with increasing the pyrolysis temperature up to $350^{\circ}C$, but decreased above the temperature. Concurrently, its PL peak wavelength continuously shifted from ${\sim}440\;nm$ to ${\sim}550\;nm$ with the temperature. The PL characteristics of the zirconia gels were closely associated with decomposition of residual organic groups, the formation of the zirconia nanocrystals, and the tetragonal to monoclinic phase transformation.

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