Research on Alumina Modified Feldspathic Dental Ceramics

doi:10.3724/SP.J.1077.2011.00983

Abstract

Abstract: Alumina modified feldspathic dental ceramics were fabricated by common sintering method, using alumina as an additive to strengthen and toughen the feldspathic ceramics. The prescription and the sintering technology of the feldspathic ceramics composite materials were identified. The influences of sintering technology on the machinability, the microhardness and the flexural strength were discussed. The feldspathic ceramics composite materials were characterized by XRD and SEM. The results reveal that the sintering temperature of feldspathic ceramics is raised with the increase of alumina content. Where the relative density of the feld spathic ceramics added with 20wt% Al₂O₃ reach 97.9% after sintered at 1200℃. Furthermore, the property of feldspathic ceramics is improved obviously with the addition of alumina. The abrasion rate reaches the maximum with the addition of 5wt% alumina, the microhardness is increased by 26.9% with addition of 20wt% Al₂O₃, and the flexural strength is increased with the increase of alumina content.

Key words: dental ceramics, common sintering, modification, feldspathic

CLC Number:

TQ171
R783

GAO Hui, ZHANG Guang-Lei, SHAO Chang-Tao. Research on Alumina Modified Feldspathic Dental Ceramics[J]. Journal of Inorganic Materials, 2011, 26(9): 983-986.

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