Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Organic Processing Parameters in Non-aqueous Tape-casting on Dispersion Stability of Barium Titanate-Borosilicate Glass Based Suspensions

비수계 테잎성형공정의 유기공정변수의 변화에 따른 티탄산바륨-붕규산염유리계 현탁액의 분산안정성

  • 여정구 (한양대학교 공과대학 세라믹공학과) ;
  • 최성철 (한양대학교 공과대학 세라믹공학과)
  • Published : 2003.11.01
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Abstract

The effect of organic processing parameters on the dispersion stability of the BaTiO$_3$-based dielectric particles and borosilicate glass particulate suspensions was investigated in a system where organic solvents, dispersant, binder and modifier were used as processing additives in a low temperature cofired ceramic fabrication processes. Two- and three-component organic solvents were used to disperse ceramic particles and it was found the better stability in the particulate suspension prepared in a bi-solvent, which was consists of toluene and ethanol in a non-azeotropic composition. The addition amount of organic additives had a great impact on dispersion in the present investigation. The flow curves of the suspensions prepared with binder and modifier were fitted according to the power-law equation, which indicates that the internal structure of the suspension could be disturbed under the applied shear stress. Finally, the LTCC green tapes were successfully tape-cast based upon the optimum formulation of LTCC suspension and its microstructure was compared with that of the hard-agglomerates.

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References

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