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J. Korean Ceram. Soc. > Volume 35(7); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(7): 726.
유기물 첨가제 조성에 따른 AI$_2$O$_3$ 그린 테이프의 유리전이온도 및 저장탄성률 변화
이명현, 이정훈, 김창은, 김대준1, 오남식1
연세대학교 세라믹공학과
Effect of Organic Additive Composition on Glass Transition Temperatures and Storage Moduli of AI$_2$O$_3$ Green Tapes
Alumina tapes having various ratios of alumina to alumina+binder+plasticizer(A ratio) and binder to binder+plasticizer(B ratio) were prepared by the tape casting method. A Dynamic Mechanical Thermal Analysis was employed to investigate influence of organic additive composition on glass transition tem-perature and storage moduli. The transition temperature was not changed by A ratio but increased from 8$^{circ}C$ to 4$0^{circ}C$ as B ratio increased from 0.3 to 0.7 The modulus was increased as both A and B ratios in-creased. The influence of A ratio on the modulus was most singificant at temperatures lower than the glass transition temperatures and that of B ratio was typically vivid higher than the transition temperatures. Especially the storage modulus curve was invreased abruptly at A ratio range where increasing rate of pack-ing density with increasing A ratio was changed. The inflection point of the modulus curve as a function of A ratio was shifted slightly toward higher A values as measuring temperature increased
Key words: Glass transition temperature, Storage modulus, AI$_2$O$_3$ tape
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