Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

The Characteristic of Agglomerate and Sintering of Y-PSZ Powders Prepared by Different Processes

제조방법에 따른 Y-PSZ 분말의 응집 및 소결특성

  • 이종국 (서울공대 무기재료공학과) ;
  • 김환 (서울공대 무기재료공학과) ;
  • 황규홍 (경상대학 재료공학과)
  • Published : 1985.05.01
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Abstract

Agglomeration of Y-PSZ and its related properties were studied. The ultrafine $ZrO_2$ powder containg 3 mol% $Y_2O_3$ was prepared by 1) coprecipitation method b) hot petroleum drying method c) sol-gel method and the characteristics of calcined powders and the microstructures of sintered body were observed. Powder prepared by the coprecipitation method was about 125$\AA$ in crystallite size and 0.1~1.0${\mu}{\textrm}{m}$ of intra-agglomerate pore size when calcined at $600^{\circ}C$ for 1 hour. because of small crystallite size and weak agglo merate strength resultant densification of sintered body was high. But above the temperature of 130$0^{\circ}C$ efflorescent phenomena due to anions attached to powder surface was observed. Powder prepared by hot petroleum drying method was 65$\AA$ in crystallite size and 1~10${\mu}{\textrm}{m}$ of intraagglome-rate pore size and it was observed that the agglemerates were formed during the calcining process. In this case despite of small crystallite size the rate of sintering was slow and the existing lenticular interagglomerate pore was not eliminated to the final stage of sintering. Powder prepared by sol-gel method showed solid agglomertes due to rapi dhydrolysis reaction. In this powder which involves strong solid agglomerates overall sintering rate was determined by the sintering between the agglomerates and therefore sinterability of powders made by sol-gel method was very poor.

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References

  1. Nature v.258 no.703;704 Ceramic Steel? R.C. Garvie(et al.)
  2. Ceram. Inter. v.8 no.2 Powder Synthesis from Metallorganic Procursors K.S. Mazdiyasni(et al.)
  3. J. Am. Ceram. Soc. v.61 no.1;2 Stress-Induced Transformation of Tetragonal ZrO₂Particles in Ceramic Matrices N. Claussen
  4. Ceramic Powders K. Haberko(et al.);P. Vincenzini(ed.)
  5. J. Mat. Sci. v.17 no.1 Transformation Toughening; Part Ⅰ F.F. Lange
  6. Ceramic Powders A. Roosen(et al.);P. Vincenzini(ed.)
  7. Ceramic Processing before Firing G.Y. Onoda(et al.)
  8. J. Mat. Sci. v.17 no.1 Transformation Toughening; Part Ⅲ F.F. Lange
  9. Ceram. Inter. v.5 no.2 Fabrication of Stabilized ZrO2 by Hot Petroleum Drying Method S.Y. Pyun
  10. Advances in Ceramics v.12 Wet-Chemical Preparation of Zirconia Powders; Their Microstructure and Behavior M.A.C.G. van de Graaf;A.J. Burggraaf;A.H. Heuer(ed.)
  11. J. Am. Ceram. Soc. v.50 no.10 Cubic Phase Stabilization of Translucent Yttria-Zirconia at Very Low Temperatures K.S. Mazdiyasni(et al.)
  12. Ceramic Processing before Firing C. Orr;G.Y. Onoda(ed.)
  13. Ceramic Processing before Firing D.E. Niesz(et al.);G.Y. Onoda(ed.)
  14. Ceramic Processing before Firing I.B. Cutler;G.Y. Onoda(ed.)
  15. J. Am. Ceram. Soc. v.64 no.1 Agglomerate and Particle Size-Effects on Sintering Yttria-Stabilized Zirconia W.H. Rhodes
  16. Ceramic Powder F.F. Lange;P. Vincenzini(ed.)
  17. Ceram. Bull. v.57 no.8 Analysis of Cl- ions Laundered from Submicron Zirconia Powders C.E. Scott(et al.)
  18. J. Am. Ceram. Soc. v.56 no.4 Effect of Anions on Hot-Pressing of MgO M.H. Leipold(et al.)