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Hydroxyapatite synthesized by a simplified hydrothermal method

Identifieur interne : 00A153 ( Main/Exploration ); précédent : 00A152; suivant : 00A154

Hydroxyapatite synthesized by a simplified hydrothermal method

Auteurs : H. S. Liu [République populaire de Chine] ; T. S. Chin [République populaire de Chine] ; L. S. Lai [République populaire de Chine] ; S. Y. Chiu [République populaire de Chine] ; K. H. Chung [République populaire de Chine] ; C. S. Chang [République populaire de Chine] ; M. T. Lui [République populaire de Chine]

Source :

Ceramics International [ 0272-8842 ] ; 1996.

RBID : ISTEX:699159804AB7B861CC999FAED9DB56C397A388F1

Descripteurs français

Wicri :
- topic : Céramique.

English descriptors

Abstract

Abstract: A simplified hydrothermal method of synthesizing hydroxyapatite powder is described. Heating powders of Ca(OH)2, Ca(H2PO4)2 · H2O and distilled water in a pressurized pot at 109 °C for 1–3 h results in powders consisting of crystallized hydroxyapatite in a needle shape, 130–170 nm in length and 15–25 nm in width. The specific surface area is 31–43 m2/g and the Ca P ratio is 1.640–1.643. The obtained HA powder can be sintered to a high density at 1200–1300 °C. No decomposition was identified by X-ray diffraction. The optimally sintered ceramic has a pore-free surface structure with a flexural strength of 120 MPa, a micro-Vickers hardness of 5.1 GPa and fracture toughness of 1.2 MPa · m 1 2. The biocompatibility of the pulverized sintered-ceramic is excellent and comparable to that of a commercial grade hydroxyapatite by evaluating the implantation in a dog. The synthesis method is simple, economic, and results in a high quality powder which is useful in hard tissue reconstruction applications.

Url:

https://api.istex.fr/document/699159804AB7B861CC999FAED9DB56C397A388F1/fulltext/pdf

DOI: 10.1016/0272-8842(95)00135-2

Affiliations:

République populaire de Chine

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Le document en format XML

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<term>Considerable grain growth</term>
<term>Crystalline phase</term>
<term>Dense hydroxyapatite</term>
<term>Diffraction patterns</term>
<term>Elsevier science</term>
<term>Excellent biocompatibility</term>
<term>Filter cake</term>
<term>Flexural strength</term>
<term>Fracture</term>
<term>Fracture strength</term>
<term>Fracture toughness</term>
<term>Hard tissue implantation</term>
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<term>Heating powders</term>
<term>Heating time</term>
<term>High density</term>
<term>High quality</term>
<term>High strength</term>
<term>High surface area</term>
<term>Higher temperatures</term>
<term>Hydrothermal</term>
<term>Hydroxyapatite</term>
<term>Hydroxyapatite ceramics</term>
<term>Large quantity</term>
<term>Mechanical properties</term>
<term>Molar ratio</term>
<term>Particle size</term>
<term>Prosthetic applications</term>
<term>Relative density</term>
<term>Scanning electron micrographs</term>
<term>Simplified hydrothermal method</term>
<term>Sintered</term>
<term>Sintered bulk ceramics</term>
<term>Sintered bulk specimens</term>
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<term>Sintering temperature</term>
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<term>Stoichiometric composition</term>
<term>Theoretical density</term>
<term>Thermal stability</term>
<term>Tricalcium phosphate</term>
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<term>Diffraction patterns</term>
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<term>Fracture strength</term>
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<term>Sintering temperature</term>
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<front><div type="abstract" xml:lang="en">Abstract: A simplified hydrothermal method of synthesizing hydroxyapatite powder is described. Heating powders of Ca(OH)2, Ca(H2PO4)2 · H2O and distilled water in a pressurized pot at 109 °C for 1–3 h results in powders consisting of crystallized hydroxyapatite in a needle shape, 130–170 nm in length and 15–25 nm in width. The specific surface area is 31–43 m2/g and the Ca P ratio is 1.640–1.643. The obtained HA powder can be sintered to a high density at 1200–1300 °C. No decomposition was identified by X-ray diffraction. The optimally sintered ceramic has a pore-free surface structure with a flexural strength of 120 MPa, a micro-Vickers hardness of 5.1 GPa and fracture toughness of 1.2 MPa · m 1 2. The biocompatibility of the pulverized sintered-ceramic is excellent and comparable to that of a commercial grade hydroxyapatite by evaluating the implantation in a dog. The synthesis method is simple, economic, and results in a high quality powder which is useful in hard tissue reconstruction applications.</div>
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Hydroxyapatite synthesized by a simplified hydrothermal method

Hydroxyapatite synthesized by a simplified hydrothermal method

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Descripteurs français

English descriptors

Abstract

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