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http://dx.doi.org/10.4191/KCERS.2002.39.9.871

Influence of Alumina Slurry Composition on Mechanical Properties of Green Tapes  

Lee, Myung-Hyun (Advanced Material Analysis and Evaluation Team, Korea Institute of Ceramic Engineering and Technology)
Park, Il-Seok (Material Research Division, Korea Institute of Science and Technology)
Kim, Dae-Joon (Material Research Division, Korea Institute of Science and Technology)
Lee, Deuk-Yong (Department of Materials Engineering, Daelim College of Technology)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.9, 2002 , pp. 871-877 More about this Journal
Abstract
Alumina slurriers, having various amount of alumina and ratio of organic additives, were prepared for tape casting. The relative viscosities were compared to investigate influence of composition on stability of the slurry and plotted as a function of powder fraction. They raised with increasing powder fraction of slurries, revealing a exponential function curve, which means that stability of slurry was not affected by amount and composition of organic additives. Cast green tapes were tested under tensile condition at room temperature. The increase in alumina ratio and binder ratio was found to decrease strain to failure of green tapes from 363% to 45% and from 68% to 25%, respectively. Tensile strength of green tapes increased abruptly with increasing alumina ratio, which showed its maximum at 1 MPa. On other hand, Tensile strength increased continuously from 0.5 MPa to 4 MPa with increasing binder ratio. Mechanical properties of them were affected seriously and lost their properties by elevating temperature from 20$^{\circ}C$ to 80$^{\circ}C$.
Keywords
Alumina tape; Relative viscosity; Mechanical property;
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