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Effects of Excess Barium Ions on Aqueous Barium Titanate Tape Properties
Author(s) -
Yoon DangHyok,
Lee Burtrand I.
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.01066.x
Subject(s) - materials science , barium titanate , barium , dielectric , aqueous solution , composite material , ceramic , permittivity , porosity , ion , slip (aerodynamics) , mineralogy , chemical engineering , metallurgy , chemistry , thermodynamics , physics , optoelectronics , organic chemistry , engineering
The effects of excess free barium ions in aqueous barium titanate slip on the resulting BaTiO 3 tape properties were investigated in terms of the slip behavior, green/sintered tape density and morphology, and dielectric properties. The excess free barium ions expressed by means of the Ba/Ti ratio adversely affected most tape properties. Increase in the slip viscosity, green porosity, and agglomeration along with a decrease in mechanical properties and green/sintered density were found with the increase in the Ba/Ti ratio. However, dielectric permittivity was increased with increase in the Ba/Ti ratio. An effort was made to correlate these phenomena with Ba 2+ leaching in water for realistic multilayer ceramic capacitor applications.