| PVP 결합제를 이용한 지르코니아/알루미나 복합분말의 분무건조 |
| 심형보, 문주호1, 김대준2 |
연세대학교 세라믹공학과, 한국과학기술연구원 복합기능세라믹 연구센타
1연세대학교 세라믹공학과
2한국과학기술연구원 복합기능세라믹연구센타 |
| Spray Drying of Zirconia/Alumina Composite Powder Using PVP as a Binder |
| Hyung-Bo Shim, Joo-Ho Moon1, Dae-Joon Kim2 |
Department of Ceramics Engineering, Yonsei University, Multifunctional Ceramics Research Center, Korea Institute of Science and Technology
1Department of Ceramics Engineering, Yonsei University
2Multifunctional Ceramics Research Center, Korea Institute of Science and Technology |
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| ABSTRACT |
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Zirconia/alumina mixture powder was spray-dried various degree of dispersion, type of dispersants and powder content in the slurry. The quality of the granule was determined by observation of the granule shapes after spray drying and fracture of intergranular boundaries during pressing. Defect-free granules were obtained from the powders that formed weak flocs in the slurry. The granules, spray-dried from the slurry containing 32.5 vol% powder mixture and PVP as binder, were fractured completely during shaping and the sintered specimens showed a density of 99.7% and a flexural strength of 850 MPa. |
| Key words:
Spray dry, Polyvinyl Pyrrolidoin(PVP), Dispersion |
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