Development of Al203 Fiber-reinforced Al2O3-based Ceramics

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  • TANIMOTO Yasuhiro
    Department of Dental Materials, Research Institute of Oral Science, Nihon University School of Dentistry
  • NEMOTO Kimiya
    Department of Dental Materials, Research Institute of Oral Science, Nihon University School of Dentistry

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Abstract

The purpose of this study was to use a tape casting technique to develop an Al2O3 fiber-reinforced Al2O3-based ceramic material (Al2O3-fiber/Al2O3 composite) into a new type of dental ceramic. The Al2O3-based ceramic used a matrix consisting of 60wt% Al2O3 powder and 40wt% SiO2-B2O3 powder. The prepreg sheets of Al2O3-fiber/Al2O3 composite (in which uniaxially aligned Al2O3 fibers were infiltrated with the Al2O3-based matrix) were fabricated continuously using tape casting technique with a doctor blade system. Multilayer preforms of Al2O3-fiber/Al2O3 composite sheets were then sintered at a maximum temperature of 1000°C under an atmospheric pressure in a furnace. The results showed that the shrinkage and bending properties of Al2O3-fiber/Al2O3 composite exceeded those of unreinforced Al2O3 - hence demonstrating the positive effects of fiber reinforcement. In conclusion, the tape casting technique has been utilized to successfully develop a new type of dental ceramic material.

Journal

  • Dental Materials Journal

    Dental Materials Journal 23 (3), 297-304, 2004

    The Japanese Society for Dental Materials and Devices

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