Mechanical Properties of Alumina-Glass Dental Composites Prepared from Aqueous-Based Tape Casting

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J. Korean Ceram. Soc. > Volume 36(10); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(10): 1123.

수계공정에 의한 알루미나 테이프로 제조한 세라믹 인공치관용 알루미나 유리 복합체의 기계적 물성

이명현, 김대준, 이득용¹, 이정훈², 김창은³

한국과학기술연구원 재료연구부
¹대림대학 금속재료과
²연세대학교 세라믹공학과
³연세대학교 세라믹 공학과

Mechanical Properties of Alumina-Glass Dental Composites Prepared from Aqueous-Based Tape Casting

ABSTRACT

Alumina-glass composites which are considered as the material of the choice for all dental crown was prepared by aqeous-based tape casting and sintering for 2h at 1120$^{circ}C$ followed by glass infiltration for 2h at 1100$^{circ}C$ Biaxial strength and fracture toughness of the composites were evaluated to determine the optimum composition of the tape as a function of the amount of constituent such as alumina binder and plasticizer. The strength and the fracture toughness of the alumina tape increased with increasing the contents of alumina and binder. These observations are consistent with in fluence of the constituents on mean alumuna particle distance in tapes suggesting that high strength of the glass infiltrated alumina composites is related to toughening by crack bowing. The biaxial strength and the fracture toughness of the composite containing the optimum constituent composition were 523 MPa and 3.3 MPa$.$1/2 respectively.

Key words: All-Ceramic Crown, Infiltration, Aqueous-Based Tape Casting Mean Particle Distance