Claims
- 1. A method for producing a porous sintered body of a calcium phosphate-based ceramic having a porosity of 80% or more, wherein said method comprises the steps of: (1) preparing a slurry comprising a calcium phosphate-based ceramic powder, a water-soluble high molecular compound and a nonionic surface active agent; (2) stirring said slurry vigorously to froth said slurry; (3) solidifying the frothed slurry into a gel; and (4) drying and sintering said gel.
- 2. The method for producing a porous sintered body according to claim 1, wherein said calcium phosphate-based ceramic powder is a secondary particle having an average particle diameter of 0.5 to 80 μm prepared from a primary particle having an average particle diameter of 100 nm or less.
- 3. The method for producing a porous sintered body according to claim 1, wherein said water-soluble high molecular compound is a cellulose derivative.
- 4. The method for producing a porous sintered body according to claim 1, wherein said nonionic surface active agent is a fatty acid alkanolamide surface active agent.
- 5. The method for producing a porous sintered body according to claim 1, wherein 1 to 10 part by weight of said water-soluble high molecular compound and 1 to 10 part by weight of said nonionic surface active agent are used with 100 parts by weight of said calcium phosphate-based ceramic powder.
- 6. The method for producing a porous sintered body according to claim 1, wherein a weight ratio of the total of said calcium phosphate-based ceramic powder, said water-soluble high molecular compound and said nonionic surface active agent is 20 to 50 weight % based on 100 weight % of said slurry.
- 7. The method for producing a porous sintered body according to claim 1, wherein said slurry is stirred under a stirring condition of 50 W/L or more to froth said slurry.
- 8. The method for producing a porous sintered body according to claim 1, wherein said slurry is stirred at 5 to 20° C. to froth said slurry.
- 9. The method for producing a porous sintered body according to claim 1, wherein said nonionic surface active agent is free of a metal ion and a sulfate group.
- 10. The method for producing a porous sintered body according to claim 1, wherein said slurry is stirred while passing a gas through said slurry to froth said slurry.
- 11. The method for producing a porous sintered body according to claim 1, wherein said calcium phosphate-based ceramic is hydroxyapatite.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-373600 |
Dec 2000 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of application Ser. No. 10/005,673, filed Dec. 7, 2001, and which claims priority of Japanese Application No. 2000-373600, filed Dec. 7, 2000. The entire disclosures of application Ser. No. 10/005,673 and Japanese Application No. 2000-373600 are considered as being part of the disclosure of this application, and the entire disclosures of application Ser. No. 10/005,673 and Japanese Application No. 2000-373600 are expressly incorporated by reference herein in their entirety.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10005673 |
Dec 2001 |
US |
Child |
10772398 |
Feb 2004 |
US |