Aqueous Tape Casting Process with Styrene-acrylic Latex Binder |
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Authors: | Cui Xue-min Ouyang Shi-xi Huang Yong Yu Zhi-yong Zhao Shi-ke and Wang Chang-an |
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Affiliation: | (1) China Building Materials Academy, China;(2) State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, 100084 Beijing, China |
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Abstract: | A commercial styrene-acrylic latex binder has been investigated as a good binder for aqueous Al2O3 suspensions tape-casting process. This paper focuses on the forming film mechanism of latex binder, the rheological behaviors
of the suspensions, physical properties of green tapes and drying process of aqueous slurries with latex binder system. The
drying process of the alumina suspensions is shown to follow a two-stage mechanism (the first stage: evoporation controlled
process; and the second stage: diffusion controlled process). During the drying stage of the suspensions, the compressive
force presses the latex particles and makes them be distorted, which results in cross-linking structure in contacted latex
particles of the solidified tapes. A smooth-surface and high-strength green tape was fabricated by aqueous tape casting with
latex binder system. The results from the SEM images of the crossing section microstructure of green tapes show that the latex
is a very suitable binder for aqueous tape casting.
CUI Xue-min: Born in 1971
Funded by “973” Program (No. G2000067204-01) |
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Keywords: | ceramics alumina aqueous tape casting latex binder drying |
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