Paper Titles
Preparation of Spherical Porous Granules Composed of Rod-Shaped Hydroxyapatite and Evaluation of their Protein Adsorption Properties
p.83
Surface Structure, Hydration and Cationic Sites of Nanohydroxyapatite
p.87
Influence of Two-Step Sintering Variables on Phase Stability of Hydrothermally Prepared HAp Nano Powders
p.91
Internal Diffusion of Micro/Nanoparticles Inside Body
p.95
The Structure and Properties of Electroceramics for Bone Graft Substitution
p.99
Variations in the Compression Strength of Cylindrical Samples Made of Dense Hydroxyapatite
p.103
The Differences between the Direct and Sol-Gel Syntheses of Silicon-Contained Calcium Phosphates
p.107
Montmorillonite-Added Calcium Phosphate Bioceramic Foams
p.111
Effect of Amine Additives on the Morphology of Hydroxyapatite
p.115

The Structure and Properties of Electroceramics for Bone Graft Substitution

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Abstract:

Hydroxyapatite (HA) and barium titanate (BT) powders were mixed and sintered to form hydroxyapatite – barium titanate (HABT) ceramics. These materials were then poled and their piezoelectric properties were measured. The microstructure of unpoled samples was examined using scanning electron microscopy (SEM).The piezoelectric constants (d33 and d31) of the ceramics were found to be dependent on the proportion of BT in the ceramic In materials containing less than 70% BT, no piezoelectric effect was found. Above this value, the piezoelectric constant increased with the addition of BT up to a value of 108pCN-1 for pure BT. Values of d33 for ceramics containing more than 80% BT are above values previously shown to have a positive influence on bone growth in vivo. SEM analysis indicated that the grain size within the materials decreased as the proportion of BT in the material was reduced. Examination of the microstructure of the ceramics indicated the presence of electrical domains in the 100% BT and 95% BT ceramics. Domains were not visible below 95% BT. The reduction in grain size may influence the reduction in piezoelectric activity within the materials but cannot be considered to be the only cause.

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Periodical:

Key Engineering Materials (Volumes 361-363)

Pages:

99-102

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.361-363.99

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Online since:

November 2007

Authors:

F.R. Baxter, I.G. Turner, Chris R. Bowen, J.P. Gittings, J.B. Chaudhuri, R.W.C. Lewis

Keywords:

Barium Titanate (BT), Bone Graft, Hydroxyapatite (HAP), Piezoelectric, Scanning Electron Microscope (SEM)

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] E. Fukada and I. Yasuda: Journal of the Physical Society of Japan Vol. 12(10) (1957), p.1158.

Google Scholar

[2] S.C. Cowin and M.L. Moss in Bone Mechanics Handbook, edited by S.C. Cowin CRC Press, Boca Raton, FL (2001).

Google Scholar

[3] G.W. Hastings and F.A. Mahmud: Journal of Biomedical Engineering Vol. 10 (1988), p.515.

Google Scholar

[4] C.T. Laurencin: Bone Graft Substitutes (ATSM International, West Conshohocken, PA, 2003).

Google Scholar

[5] J.Q. Feng, H.P. Yuan and X.D. Zhang: Biomaterials Vol. 18(23) (1997), p.1531.

Google Scholar

[6] B. Callegari and W.D. Ballengero: Acta Orthopaedica Brasileira Vol. 12 (2004), p.160.

Google Scholar

[7] W. Hackenberger, M.J. Pan, V. Vedula, P. Pertsch, W.W. Cao, C. Randall and T. Shrout (1998), SPIE, 3324: 28-. 36.

Google Scholar

[8] W. Cau and C.A. Randall: Journal of Physics and Chemistry of Solids Vol. 57(10) (1996), pp.1499-1505.

Google Scholar

[9] G. Arlt: Journal of Materials Science Vol. 25 (1990) p.2655.

Google Scholar

[10] H. Takahashi, Y. Numamoto, J. Tani and S. Tsurekawa: Japanese Journal of Applied Physics Vol. 45(9B): p.7405.

Google Scholar