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http://dx.doi.org/10.4191/KCERS.2002.39.5.446

Spray Drying of Zirconia/Alumina Composite Powder Using PVP as a Binder  

Shim, Hyung-Bo (Department of Ceramics Engineering, Yonsei University, Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
Moon, Joo-Ho (Department of Ceramics Engineering, Yonsei University)
Kim, Dae-Joon (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.5, 2002 , pp. 446-451 More about this Journal
Abstract
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.
Keywords
Spray dry; Polyvinyl Pyrrolidoin(PVP); Dispersion;
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