Y2O3안정화제 첨가량에 따라 수열합성법으로 제조된 ZrO2-Xmol% Y2O3분말의 합성 및 기계적 특성

이학주; 김택남; 배성철; 고명원; 류재경; Lee Hak Joo; Kim Taik Nam; Bea Sung Chul; Go Myung Won; Ryu Jae Kyung

Korean Journal of Materials Research, Vol.20, No.10, 518-523, October, 2010

DOI10.3740/MRSK.2010.20.10.518 Export Citation

Y2O3안정화제 첨가량에 따라 수열합성법으로 제조된 ZrO2-Xmol% Y2O3분말의 합성 및 기계적 특성

Hydrothermal Synthesis and Mechanical Characterization of ZrO2 by Y2O3 Stabilizer Contents

이학주, 김택남^{1, †}, 배성철¹, 고명원², 류재경³

배재대학교대학원 재료공학과
¹배재대학교 정보전자소재공학과
²광양보건대학 치기공과
³신흥대학 치기공과

Lee Hak Joo, Kim Taik Nam^{1, †}, Bea Sung Chul¹, Go Myung Won², and Ryu Jae Kyung³

Department of Materials Science and Engineering, Paichai University, Daejeon 302-735, Korea
¹Department of Information and Electronic Materials Engineering, Paichai University, Daejeon 302-735, Korea
²Department of Dental lab. Technology, Kwamng Yang Health College University, Korea
³Department of Dental Technology, Shinheung College University, Korea

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In this study, partially stabilized zirconia was synthesized using a chemical Y2O3 stabilizer and hydrothermal method. First, YCl3-6H2O and ZrCl2O-8H2O was dissolved in distilled water. Y-TZP (a Y2O3-doped toughened zirconia polycrystalline precursor) was also prepared by conventional co-precipitates in the presence of an excess amount of NH4OH solution under a fixed pH of 12. The Y-TZP precursors were filtered and repeatedly washed with distilled water to remove Cl. ions. ZrO2-Xmol%Y2O3 powder was synthesized by a hydrothermal method using Teflon Vessels at 180oC for 6 h of optimized condition. The powder added with the Xmol%- Y2O3 (X = 0,1,3,5 mol%) stabilizer of the ZrO2 was synthesized. The crystal phase, particle size, and morphologies were analyzed. Rectangular specimens of 33 mm ×8mm× 3 mm for three-point bend tests were used in the mechanical properties evaluation. A teragonal phase was observed in the samples, which contains more than 3 mol% Y2O3. The 3Y-ZrO2 agglomerated particle size was measured at 7.01 μm. The agglomerated particle was clearly observed in the sample of 5 mol % Y2O3-ZrO2, and and the agglomerated particle size was measured at 16.4 um. However, a 20 nm particle was specifically observed by FE-SEM in the sample of 3 mol% Y2O3-ZrO2. The highest bending fracture strength was measured as 321.3 MPa in sample of 3 mol% Y2O3-ZrO2.

Keywords:Y-TZP;hydrothermal;bending strength;tetragonal phase

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[3] Kundu P, Pal D, Sen S, J. Mater. Sci., 23, 1539 (1988)

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[8] Lee JE, Song JH, Journal of the Korea Research Society for Dental Materials, (in Korean) (ISSN: 1225-1631), 36, 109 (2009)

[9] Hirata Y, Nakamura M, Miyamoto M, Tanaka Y, Wang XH, J. Am. Ceram. Soc., 89(6), 1883 (2006)

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