Sj. Lee et al., SHRINKAGE-FREE, ALUMINA-GLASS DENTAL COMPOSITES VIA ALUMINUM OXIDATION, Journal of the American Ceramic Society, 80(8), 1997, pp. 2141-2147
Alumina-glass composites that contain oxidized aluminum were investiga
ted to make shrinkage-free, all-ceramic dental porcelain. This was ach
ieved by control of the volume expansion and shrinkage that occur duri
ng 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 usin
g 4-5 vol% of aluminum powder with an average particle size of 6 mu m
in the alumina-glass composite made by the In-Ceram method.