Back to results
US 12,595,212 B2Granted
Two-stage sintering method for preparing porous biphasic calcium phosphate ceramic from calcium-containing biological waste
AssigneeCouncil of Agriculture, Executive Yuan
InventorsWen-Fu Ho, Hsueh-Chuan Hsu, Shih-Ching Wu
Life of this patent
Estimating the term…
Abstract
The present invention relates to a two-stage sintering method for preparing a porous biphasic calcium phosphate ceramic from calcium-containing biological waste, wherein hydroxyapatite prepared from calcium-containing waste is mixed with a foaming agent to prepare a bone graft material having medicinal use through two-stage sintering.
Claims6
A two-stage sintering method for preparing a porous biphasic calcium phosphate ceramic from calcium-containing biological waste, comprising:
- a mixing and rotating step of mixing hydroxyapatite and a foaming agent into a mixture, and stirring the mixture at high speed into a foam shape;
- a drying step of drying the mixture of the foam shape into a shaped mixture;
- a first-stage sintering step of heating the shaped mixture at 300° C. to 900° C. for 1 to 5 hours;
- and
- a second-stage sintering step of continually heating the shaped mixture after the first-stage sintering at 1000° C. to 1200° C. for 15 to 30 hours to obtain a bone graft material containing the porous biphasic calcium phosphate ceramic.
2 more elements
Dependencies are inferred from the claim text.