Electro-Elastic Behavior of Polarized Hydroxyapatite and Barium Titanate Piezocomposite

Abstract:

This study investigates the piezoelectric properties of a composite comprising polar hydroxyapatite (HA) and BaTiO₃ using an analytical model. The analysis covers the piezoelectric coefficients d₃₃ ​and d₃₁, and the specific acoustic impedance. The findings reveal that HA exhibits an unconventional d₃₃​ behavior, while the composite demonstrates a decrease in d₃₁​ and an increase in d₃₃​, with minimal BaTiO₃ content achieving d₃₃​ values similar to those of human bone (< 1 pC/N). Additionally, the d₃₁ coefficient of HA showed an unconventional behavior, highlighting its potential usage in the transverse direction. The impedance also increases from 23.5 MRayls to 31.5 MRayls, which improves acoustic wave transmission for medical imaging and therapeutic devices. These results highlight the composite's promise for bone regeneration, implantable ultrasound transducers, and energy harvesting applications.

• Periodical: Solid State Phenomena (Volume 372)
• Pages: 57-62
• DOI: https://doi.org/10.4028/p-8OPrka
• Online since: July 2025
• Authors: Emmanuel Essel Mensah*, Ahmed S. G. Khalil, Ahmed Abd El-Moneim, Mohsen A. Hassan
• Keywords: Ceramic Composite, Hydroxyapatite, Numerical Modeling, Piezoelectricity

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