Glasses exhibiting controlled fluoride release

Details Glasses exhibiting controlled fluoride release Glasses exhibiting controlled fluoride release

1989-10-25

1990-04-24

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C03C 3118

Patent

active

049200828

ABSTRACT:
This invention is directed to the preparation of fluoride-containing glasses wherein, when exposed to aqueous solutions, fluoride will be leached therefrom in a controlled manner over a long period of time and which can be melted and formed with little loss of fluorine through volatilization. The glasses are essentially free from alkali metal oxides and heavy toxic metals and consist essentially, in weight percent, of:

REFERENCES:
patent: 2393449 (1946-01-01), Armistead
patent: 3716385 (1973-02-01), Ritzi
patent: 4412015 (1983-10-01), Lustgarden et al.
Bowen, R. L. et al., "X-Ray Opaque Reinforcing Fillers for Composite Materials", Journal of Dental Research, Jan.-Feb. 1969, pp. 79-82.
Bowen, R. L., et al.; "A New Series of X-Ray-Opaque Reinforcing Fillers for Composite Materials"; Journal of Dental Research, Jan.-Feb. 1972, pp. 177-182.

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