article · Diffusion and defect data, solid state data. Part B, Solid state phenomena/Solid state phenomena
This study investigates the piezoelectric properties of a composite comprising polar hydroxyapatite (HA) and BaTiO 3 using an analytical model. The analysis covers the piezoelectric coefficients d 33 and d 31 , and the specific acoustic impedance. The findings reveal that HA exhibits an unconventional d 33 behavior, while the composite demonstrates a decrease in d 31 and an increase in d 33 , with minimal BaTiO 3 content achieving d 33 values similar to those of human bone (< 1 pC/N). Additionally, the d 31 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.
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DOI: 10.4028/p-8oprka
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