Y-TZP Sintered with Spherical Fine Powders Prepared by Ultrasonic Spray Pyrolysis

초음파 분무 열분해 구형 미립자를 이용한 Y-TZP 소결체의 제조

  • 김복희 (전북대학교 재료공학과) ;
  • 이정형 (전북대학교 재료공학과)
  • Published : 1995.05.01


Zr0.94Y0.06O1.97 powder was synthesized by the ultrasonic spray pyrolysis with various concentrations of starting solution and the influence of powder characteristics on sintering behavior was investigated. Powders prepared at 75$0^{\circ}C$ were characterized as narrowly distributed submicron spherical particles, which were crystalline, nonagglomerated, and compositionally homogeneous. The changes in concentration from 0.01 to 01. mol/ι increased mean particle size from 0.24 to 0.38${\mu}{\textrm}{m}$ and decreased the specific surface area from 14.2 to 2.9$m^2$/g. The relative density of the specimen from the powders, prepared with the solution concentration of 0.01 mol/ι, was 98% after sintering for 2 hr at 1,45$0^{\circ}C$ and the monoclinic phase was observed after sintering at 1,55$0^{\circ}C$. As the concentration of starting solution was increased, the formation temperature of monoclinic phase was lowered.


Y-TZP;Ultrasonic spray pyrolysis;Powder synthesis;Spherical powder;Sintered body


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