Electron microscopy of biomaterials based on hydroxyapatite

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774506050191· OSTI ID:21091435

Klechkovskaya, V V ^[1]; Komarov, V F; Severin, A V; Melikhov, I V ^[2]; Buffat, P A ^[3]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
2. Moscow State University (Russian Federation)
3. Ecole Polytechnique Federale de Lausanne, Centre Interdisciplinaire de Microscopie Electronique (Switzerland)

Three types of biomaterials based on hydroxyapatite are synthesized and investigated. Hydroxyapatite nanocrystals or microcrystals precipitated from low-temperature aqueous solutions serve as the initial material used for preparing spherical porous granules approximately 300-500 {mu}m in diameter. Sintering of hydroxyapatite crystals at a temperature of 870 deg. C for 2 h or at 1000 deg. C (for 3 h) + 1200 deg. C (for 2 h) brings about the formation of solid ceramics with different internal structures. According to the electron microscopic data, the ceramic material prepared at 870 deg. C is formed by agglomerated hydroxyapatite nanocrystals, whereas the ceramics sintered at 1200 deg. C (with a bending strength of the order of 100 MPa) are composed of crystal blocks as large as 2 {mu}m. It is established that all the biomaterials have a single-phase composition and consist of the hydroxyapatite with a structure retained up to a temperature of 1200 deg. C.

• OSTI ID: 21091435
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 5 Vol. 51; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
APATITES
AQUEOUS SOLUTIONS
CERAMICS
CRYSTALS
ELECTRON MICROSCOPY
FLEXURAL STRENGTH
NANOSTRUCTURES
POROUS MATERIALS
SINTERING
SPHERICAL CONFIGURATION
TEMPERATURE RANGE 1000-4000 K