Effect of Processing Parameters on the Densification-Behaviors by Low Shrinkage in Clay Materials

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J. Korean Ceram. Soc. > Volume 33(7); 1996 > Article

Journal of the Korean Ceramic Society 1996;33(7): 725.

점토질소지의 공정제어에 따른 저수축 치밀화효과

임희진, 최성철, 이응상¹, 이진성²

한양대학교 무기재료공학과
¹한양대학교 무기재료공학
²한양여자전문대학 도자기공예과

Effect of Processing Parameters on the Densification-Behaviors by Low Shrinkage in Clay Materials

ABSTRACT

Shrinkage behaviors associated with forming drying and firing processes could be a driving force for the densification in materials. Low shrinkage-densification behaviors in clay materials have been shown to be highly dependent upon the processing parameters including particle size effect and kinetic behaviors caused by phases transformation characteristics. Chamottes pre-treated at 90$0^{circ}C$ and 120$0^{circ}C$ had dominent influence upon shrinkage control of materials during heat-treatment. But Coarse chamotte particles heat-treated at 120$0^{circ}C$ did not contri-bute to any densification behaviors in clay materials while these added coarse particles could enhance near-net-shape control. Microstructure / property relationships in clay materials have been thought to be directly influenced by optimized characteristics between low shrinkage and densification behaviors

Key words: Clay materials, Low shrinkage-densification, Particle size, Heat-treated chamotte