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Title: Methods of synthesizing hydroxyapatite powders and bulk materials

Abstract

Methods are provided for producing non-porous controlled morphology hydroxyapatite granules of less than 8 .mu.m by a spray-drying process. Solid or hollow spheres or doughnuts can be formed by controlling the volume fraction and viscosity of the slurry as well as the spray-drying conditions. Methods of providing for homogenous cellular structure hydroxyapatite granules are also provided. Pores or channels or varying size and number can be formed by varying the temperature at which a hydroxyapatite slurry formed in basic, saturated ammonium hydroxide is spray-dried. Methods of providing non-porous controlled morphology hydroxyapatite granules in ammonium hydroxide are also provided. The hydroxyapatite granules and bulk materials formed by these methods are also provided.

Inventors:
 [1]
  1. 2843A Forest Ave., Berkeley, CA 94705
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
872094
Patent Number(s):
US 5858318
Application Number:
08/757849
Assignee:
Luo, Ping (2843A Forest Ave., Berkeley, CA 94705)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
methods; synthesizing; hydroxyapatite; powders; bulk; materials; provided; producing; non-porous; controlled; morphology; granules; spray-drying; process; solid; hollow; spheres; doughnuts; formed; controlling; volume; fraction; viscosity; slurry; conditions; providing; homogenous; cellular; structure; pores; channels; varying; size; temperature; basic; saturated; ammonium; hydroxide; spray-dried; volume fraction; ammonium hydroxide; slurry form; hollow spheres; bulk material; materials formed; drying process; varying size; hollow sphere; cellular structure; /423/501/

Citation Formats

Luo, Ping. Methods of synthesizing hydroxyapatite powders and bulk materials. United States: N. p., 1999. Web.
Luo, Ping. Methods of synthesizing hydroxyapatite powders and bulk materials. United States.
Luo, Ping. Tue . "Methods of synthesizing hydroxyapatite powders and bulk materials". United States. https://www.osti.gov/servlets/purl/872094.
@article{osti_872094,
title = {Methods of synthesizing hydroxyapatite powders and bulk materials},
author = {Luo, Ping},
abstractNote = {Methods are provided for producing non-porous controlled morphology hydroxyapatite granules of less than 8 .mu.m by a spray-drying process. Solid or hollow spheres or doughnuts can be formed by controlling the volume fraction and viscosity of the slurry as well as the spray-drying conditions. Methods of providing for homogenous cellular structure hydroxyapatite granules are also provided. Pores or channels or varying size and number can be formed by varying the temperature at which a hydroxyapatite slurry formed in basic, saturated ammonium hydroxide is spray-dried. Methods of providing non-porous controlled morphology hydroxyapatite granules in ammonium hydroxide are also provided. The hydroxyapatite granules and bulk materials formed by these methods are also provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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