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Shrinkage‐Free, Alumina–Glass Dental Composites via Aluminum Oxidation
Author(s) -
Lee SangJin,
Waltraud M. Kriven,
Kim HyunMin
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03100.x
Subject(s) - shrinkage , materials science , composite material , aluminium , composite number , ceramic , particle size , particle (ecology) , aluminium oxides , compressive strength , chemical engineering , catalysis , biochemistry , oceanography , chemistry , geology , engineering
Alumina–glass composites that contain oxidized aluminum were investigated to make shrinkage‐free, all‐ceramic dental porcelain. This was achieved by control of the volume expansion and shrinkage that occur during the aluminum oxidation and densification processes. The dimensional change and strength of the alumina‐glass composites were dependent on the aluminum content and particle size. A shrinkage‐free sample with a strength of 330 MPa and transmittance of 1.21 was fabricated by using 4‐5 vol% of aluminum powder with an average particle size of 6 μ m in the alumina‐glass composite made by the In‐Ceram method.