Process for making porous sintered body of calcium phosphate

Details Process for making porous sintered body of calcium phosphate Process for making porous sintered body of calcium phosphate

1981-05-27

1983-02-01

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 69, 264 81, 264221, 264311, 264317, B29H 720

Patent

active

043714846

ABSTRACT:
A process for making a porous sintered body of calcium phosphate having continuous and fine pores distributed uniformly throughout the porous body is provided which comprises the steps of: preparing a slurry of amorphous calcium phosphate having a molar ratio of calcium to phosphor ranging within 1.59 to 1.80; adding a foaming agent to said slurry; dipping a porous body of an organic material having continuous and fine void channels into said slurry prior to or after foaming said slurry to allow said slurry to adhere on the internal walls of said void channels; heating said porous body of said organic material at a temperature high enough for decomposing said organic material to varnish into smoke and concurrently for thermally converting said amorphous calcium phosphate into hydroxyapatite to form a network of hydroxyapatite; and sintering said network of hydroxyapatite to form said porous sintered body.

REFERENCES:
patent: 3090094 (1963-05-01), Schwartzwalder
patent: 3326787 (1967-06-01), Jacobs
patent: 3396952 (1968-08-01), Jennrich et al.
patent: 3907579 (1975-09-01), Ravault
patent: 3939002 (1976-02-01), Washbourne
patent: 4004933 (1977-01-01), Ravault
patent: 4149894 (1979-04-01), Eblhara et al.
Kyobashi, Chuo-Ku, Bridgestone Tire Co., Ltd., Tokyo, Japan, May 9, 1977.
Kanebo Chemicals Co. Ltd., Dec. 1975.

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