Abstract
In this work we study the pressing and subsequent sintering of hydroxyapatite powders prepared by two methods, i.e., precipitation from aqueous solutions (I) and heterophase synthesis (II). The particle size of powders I and II does not exceed 50 and 100 nm, respectively. In the optimum pressing mode, the relative density of billets reaches 60%. The pressing of powders with preevacuation contributes to the formation of a more homogeneous structure of ceramics. The strength of the ceramics prepared without and with evacuation is 25 ± 1 MPa and 20 ± 1 MPa, respectively; the decrease is attributed to higher open porosity.
Similar content being viewed by others
References
S. M. Barinov and V. S. Komlev, Bioceramics Based on Calcium Phosphate (Nauka, Moscow, 2005) [in Russian].
T. J. Webster, C. Ergun, R. H. Doremus, R. W. Siegel, and R. Bizios, “Specific Proteins Mediate Enhanced Osteoblast Adhesion on Nanophase Ceramics,” J. Biomed. Mater. Res. 51, 475–483 (2000).
T. J. Webster, R. W. Siegel, and R. Bizios, “Osteoblast Adhesion on Nanophase Ceramics,” Biomaterials 20, 1221–1227 (1999).
I. R. Gibson and W. Bonfield, “Preparation and Characterization of Magnesium/Carbonate co-substituted Hydroxyapatites,” J. Mater. Sci.: Mater. Med. 13, 685–693 (2002).
I. R. Gibson and W. Bonfield, “Novel Synthesis and Characterization of an AB-Type Carbonate-Substituted Hydroxyapatite,” J. Biomed. Mater. Res. 59, 697–708 (2002).
E. Landi, A. Tampieri, G. Celotti, and S. Sprio, “Densification Behaviour and Mechanisms of Synthetic Hydroxyapatites,” J. Eur. Ceram. Soc. 20, 2377–2387 (2000).
A. J. Ruys, M. Wei, C. C. Sorrell, M. R. Dickson, A. Brandwood, and B. K. Milthorpe, “Sintering Effects on the Strength of Hydroxyapatite,” Biomaterials 16, 409–415 (1995).
K. Uematsu, M. Takagi, T. Honda, N. Uchida, and K. Saito, “Transparent Hydroxyapatite Prepared by Hot Isostatic Pressing of Filter Cake,” J. Am. Ceram. Soc. 72(8), 1476–1478 (1989).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © M.I. Alymov, N.V. Bakunova, S.M. Barinov, I.A. Belunik, A.S. Fomin, V.M. Ievlev, S.A. Soldatenko, 2011, published in Rossiiskie Nanotekhnologii, 2011, Vol. 6, Nos. 5–6.
Rights and permissions
About this article
Cite this article
Alymov, M.I., Bakunova, N.V., Barinov, S.M. et al. Specific features of the densification of hydroxyapatite nanopowders upon pressing. Nanotechnol Russia 6, 353–356 (2011). https://doi.org/10.1134/S1995078011030025
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1995078011030025