Preparation of Al2O3-ZrO2 Composite Powders by the Use of mulsions : II. Emulsion-Hot Kerosene Drying Method

에멀젼을 이용한 Al2O3-ZrO2 복합분체의 제조 : II. 에멀젼-가열석유 증발법

  • 현상훈 (연세대학교 요업공학과) ;
  • 백종규 (연세대학교 요업공학과)
  • Published : 1988.03.01


Alumina-zirconia composite powders for the purpose of improving fracture toughness and thermal shock resistance of alumina were prepared by the emulsion-kerosene drying method. The average particle size of composite powders was less then 1 $\mu\textrm{m}$ and their shapes were spherical. It was shown that the average particle size of composite powders decreased with the concentration of metal-salt in solution and the amount of span 80 added when preparing emulsions. The structure of all zirconia in composite powders heat-treated at 1200$^{\circ}C$ was a tetragonal form at room temperature. This result implied that fine zirconia particles were homogeneously dispersed in the alumina matrix.



  1. J. Korean Ceramic Society v.24 no.6 Preparation of Al₂O₃-ZrO₂Composite Powders by the Use of Emulsions:Ⅰ. Thermodynamic Model of the Emulsion Stability S.H. Hyun;J.G. Paik;S.R. Song
  2. Am. Ceram. Soc. Bull. v.60 no.2 Nonconventional Powder Preparation Techniques D.W. Johnson, Jr.
  3. Ceramic Powder The Use of Emulsions in the Preparation of Ceramic Powders P. Reynen;H. Bastius;M. Fiedler;P. Vincenzini(ed.)
  4. J. Am. Ceram. Soc. v.61 no.1-2 Stress-Induced Transformation of Tetragonal ZrO₂Particles in Ceramic Matrices N. Claussen
  5. J. Am. Ceram. Soc. v.45 no.12 Effect of Pressure on Mono-clinic-Tetragonal Transition of Zirconia: Thermodynamics E.D. Whitney
  6. Better Ceramics Through Chemistry Ⅱ Preparation of Ceramic Powders from Emulsions M. Akinc;K. Richardson;C.J. Brinker(ed.);D.R. Ulrich(ed.);D.E. Clark(ed.)
  7. J. Am. Ceram. Soc. v.67 no.5 Preparation of Alumina-Zirconia Powders by Evaporative Decomposition of Solutions D.W. Spronson;G.L. Messing
  8. J. Am. Ceram. Soc. v.59 no.1-2 Fracture Toughness of Al₂O₃with an Unstabilized ZrO₂Dispersed Phase N. Claussen
  9. J. Phy. chem. v.69 no.4 The Occurrence of Metastable Tetragonal Zirconia as a Crystallite Size Effect R.C. Garvie
  10. J. Mat. Sci. v.17 no.1 Transformation Toughening F.F. Lange