Non-greening porcelain compositions

Details Non-greening porcelain compositions Non-greening porcelain compositions

1998-07-10

2000-07-11

Koslow, C. Melissa

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

106 35, 501 59, 501 63, 501 64, 501 66, 501 68, 501 69, 501 70, 501 72, 433202, 433216, 4332121, 427 229, A61C 13083, C03C 802, C03C 3091, C03C 3083, C03C 3118

Patent

active

060872829

ABSTRACT:
Porcelain compositions of the present invention possess non-greening properties and comprise one or more glass or glass-ceramic components. Additionally, an oxygen release agent is included in the compositions. The porcelain compositions may vary depending upon the specific thermal properties desired.
The application temperature of the porcelain compositions ranges from about 600.degree. C. to about 930.degree. C. depending upon the method of application of the porcelain. The coefficient of thermal expansion is preferably in the range of about 11.times.10.sup.-6 /.degree. C. to about 16.times.10.sup.-6 /.degree. C. The porcelain is compatible with cores and/or substrates having coefficients of thermal expansion in the range of about 11 to about 20.times.10.sup.-6 /.degree. C.

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Obrien WJ, Boenke KM, Linger JB, Groh CL; Cerium Oxide as a Silver Decolorizer in Dental Porcelains; Dental Materials 14:365-369, Sep., 1998.

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