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

Abstract

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.

Keywords

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

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