Phosphate of calcium ceramics

Details Phosphate of calcium ceramics Phosphate of calcium ceramics

1981-04-21

1983-03-08

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

501 45, 501 73, 501 77, 501151, 501123, C04B 3500, C04B 3502

Patent

active

043761682

ABSTRACT:
A strong and biocompatible sintered phosphate of calcium ceramics are obtained by sintering a powdery material substantially consisting of phosphate of calcium having a Ca/P ratio of 1.4-1.75, e.g. apatite group and/or tricalcium phosphate, and not exceeding 15% by weight of CaO-P.sub.2 O.sub.5 frit having a Ca/P ratio of 0.2-0.75. Y.sub.2 O.sub.3 incorporation therein improves the bending strength of the ceramics. Furthermore, a P.sub.2 O.sub.5 -metal oxide frit wherein metal oxide being one or more selected from BaO, CaO, MgO, ZnO, NaO and K.sub.2 O provides a more improved bending strength. The Y.sub.2 O.sub.3 incorporation herein still improves the strength of the sintered product.

REFERENCES:
patent: 3893841 (1975-07-01), Nijhawan et al.
patent: 4097935 (1978-07-01), Jarcho
patent: 4113500 (1978-09-01), Ebihara et al.
patent: 4135935 (1979-01-01), Pfeil et al.
patent: 4308064 (1981-12-01), Takami et al.
Abe, Y. et al. "Studies of Calcium Phosphate Glass-Ceramics Development of Dental Materials (Part 1)" Shikaki Kogaku-Zasshi, vol. 16, No. 36 (1975) pp. 196-198, 202.

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