Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1984-11-01
1987-10-06
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
501 48, 501 46, 501 47, 501 73, 128 92VP, C03C 1002, C03C 317
Patent
active
046983180
ABSTRACT:
A phosphate glass ceramic which can be utilized especially as biomaterial in medicine and biology. The object of the invention is to provide a glass ceramic extensively adapted to bone, possessing adjustable biologically active characteristics. Another object of the invention is to produce a glass ceramic free of SiO.sub.2 or low in SiO.sub.2, of high P.sub.2 O.sub.5 and CaO content, possessing adjustable biologically active characteristics. The object is solved, whereby an initial glass of the composition having the mass percentages of Al.sub.2 O.sub.3 3-21, CaO 8-26, R.sub.2 O 10-25, P.sub.2 O.sub.5 43-58, is provided under the condition that R.sub.2 O can contain up to 25% of mass of Na.sub.2 O and up to 18% of mass of K.sub.2 O, and is thermally treated after melting, to provide the new phosphate glass ceramic. The main crystal phases are apatite and aluminiumorthophosphate. The phosphate glass ceramic can contain additions of SiO.sub.2, B.sub.2 O.sub.3, F.sup.-, MgO, FeO, Fe.sub.2 O.sub.3, TiO.sub.2.
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Holand Wolfram
Vogel Jurgen
Vogel Werner
Dixon Jr. William R.
Group Karl
Veb Jenaer Glaswerk
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