Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1980-07-23
1981-12-29
McCarthy, Helen M.
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
3 19, 128 92C, 106 35, 433228, 501151, 501 52, 501 1, C04B 3500, A61F 100, A61F 500
Patent
active
043080642
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
patent: 3981736 (1976-09-01), Broemer et al.
patent: 4097935 (1978-07-01), Jarcho
patent: 4113500 (1978-09-01), Ebihara et al.
patent: 4120730 (1978-10-01), Trojer et al.
patent: 4135935 (1979-01-01), Pfeil et al.
patent: 4146936 (1979-04-01), Aoyagi et al.
patent: 4218255 (1980-08-01), Bajpai 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.
Kondo Kazuo
Takami Akio
McCarthy Helen M.
NGK Spark Plugs Co., Ltd.
LandOfFree
Phosphate of calcium ceramics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Phosphate of calcium ceramics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phosphate of calcium ceramics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1017060