| 초음파 분무 열분해 구형 미립자를 이용한 Y-TZP 소결체의 제조 |
| 김복희, 이정형 |
| 전북대학교 재료공학과 |
| Y-TZP Sintered with Spherical Fine Powders Prepared by Ultrasonic Spray Pyrolysis |
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| ABSTRACT |
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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. |
| Key words:
Y-TZP, Ultrasonic spray pyrolysis, Powder synthesis, Spherical powder, Sintered body |
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