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http://dx.doi.org/10.4313/JKEM.2008.21.3.236

Effect of Solvent Mixture Ratio on Rheology Property of Slurry and Thickness Control of Ceramic Green Sheets  

Kim, Jun-Young (전자부품연구원 전자소재패키지연구센터)
Kim, Seung-Taek (전자부품연구원 전자소재패키지연구센터)
Park, Jong-Chul (전자부품연구원 전자소재패키지연구센터)
Yoo, Myong-Jae (전자부품연구원 전자소재패키지연구센터)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.21, no.3, 2008 , pp. 236-241 More about this Journal
Abstract
The effect of organic solvent mixture ratio on the rheology property of slurry and thickness control of ceramic green sheet was investigated. For selecting a suitable dispersant multiple light scattering method was used to evaluate the particle migration velocity and variation of clarification layer thickness. Using the selected dispersant the dispersion property of solution according to solvent mixture ratio was investigated. Binder and plasticizers were added to formulate slurries and their viscosity was evaluated according to solvent mixture ratio. Ceramic green sheets with average thickness of 30, 50 urn were fabricated via tape casting and their thickness tolerances measured. As a result according to solvent mixture ratio the solution and slurry properties varied and for the mixture ratio of ethanol/toluene of 80/20 the ceramic green sheet with the lowest thickness tolerance was obtained.
Keywords
LTCC; Green sheet; Thickness tolerance; Solvent ratio;
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