Development of Al2O3 fiber-reinforced Al2O3-based ceramics.
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 60 wt% Al2O3 powder and 40 wt% 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 degrees 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.
Tanimoto
Yasuhiro
Y
Department of Dental Materials, Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Chiba, Japan. tanimoto@mascat.nihon-u.ac.jp
Nemoto
Kimiya
K
D000537:Aluminum Oxide; D000704:Analysis of Variance; D003776:Dental Porcelain / Q000138:chemical synthesis*; D003799:Dental Stress Analysis; D006361:Heating; D008422:Materials Testing; D010316:Particle Size; D018583:Pliability; D014961:X-Ray Diffraction
D003776:Dental Porcelain; D000537:Aluminum Oxide