LTCC 슬러리 및 그린시트의 물성 변화에 미치는 혼합용매 조성의 영향

조범준; 박은태; Beom-Joon Cho; Eun-Tae Park

Korean Journal of Materials Research, Vol.16, No.9, 533-537, September, 2006

DOI10.3740/MRSK.2006.16.9.533 Export Citation

LTCC 슬러리 및 그린시트의 물성 변화에 미치는 혼합용매 조성의 영향

Effect of Solvent Mixture on the Properties of LTCC Slurry and Green Sheets

조범준^†, 박은태

삼성전기 기술총괄 eMD Lab(LTCC)

Beom-Joon Cho^†, and Eun-Tae Park

eMD Lab(LTCC), Central Institute, Samsung Electro-Mechanics CO.,LTD., Korea

E-mail:

The effects of binary solvent mixtures with various ratios of toluene and ethanol on the properties of slurries and green sheets were investigated. Viscosity of slurry was changed by varying the ratio of solvent mixture which affected the solubility of binder. The relative solvency behavior of a solvent mixture could be predicted with the Hildebrand solubility parameter() and hydrogen bonding index( ). The minimum viscosity, the best dispersion of binder, was reached at the composition of toluene:ethanol=4:6, which corresponded to our forecast. The mechanical properties of green sheets related to evaporation of solvents were influenced by the composition of the solvent mixture. At the azeotrope the skin was formed on a drying cast during the drying process because of fast evaporation. At a range of concentrations over 50wt% toluene, green sheets could not be fully dried at low temperature due to excessive toluene. The mechanical properties of green sheets were excellent at the azeotrope-like composition of toluene:ethanol=4:6 which has a little excess of toluene over the azeotrope.

Keywords:solvent mixture;solubility;green sheet;azeotrope-like;evaporation

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[1] Gardner RA, Nufer RW, Solid State Technology, 17(5), 38 (1974)

[2] Song JK, Um WS, Lee HS, Kang MS, Chung KW, Park JH, J. European Ceram. Soc., 20, 685 (2000)

[3] Descamps M, Ringuet G, Leger D, Thierry B, J. European Ceram. Soc., 15, 357 (1995)

[4] Moreno R, Am. Ceram. Soc. Bull., 71(5), 1521 (1992)

[5] Oh YJ, Jeong HJ, Bulletin of the Korean Ceramic Society, 12(1), 3 (1997)

[6] Salam LA, Matthews RD, Robertson H, Mater. Chem. Phys., 62(3), 263 (2000)

[7] Publication No. 2008084D, Butvar Polyvinyl Butyral Resin, Monsanto Company, St. Louis, MO, 1999 (1999)

[8] Burke J, AIC Book and Paper Group Annual, 3, 13 (1984)

[9] Ohta M, Oguchi T, Yamamoto K, Pharmaceutica Acta Helvetiae, 74, 59 (1999)

[10] Briscoe B, Luckham P, Zhu S, Polymer, 41(10), 3851 (2000)

[11] Mistler RE, Shanefield DJ, Runk RB, Ceramic Processing Before Firing, p. 411-448, edited by G. Y. Onoda and L. L. Hench, Wiley & Sons, Inc., New York (1978) (1978)