Journal
JOURNAL OF APPLIED PHYSICS
Volume 105, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3093863
Keywords
aggregates (materials); bioceramics; calcium compounds; elastic constants; piezoceramics; piezoelectricity; sintering; ultrasonic effects
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Funding
- University of Limerick, Enterprise Ireland [PC/259/2005]
- Education Ministries of both Ireland and the Czech Republic
- Czech Grant Agency [202/07/1289]
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Macroscopic piezoelectricity in hydroxyapatite (HA) ceramic was measured by a direct quasistatic method and an ultrasonic interference technique. The effective symmetry of polycrystalline aggregate was established and a detailed theoretical analysis was carried out to determine by these two methods the shear piezoelectric coefficient, d(14), of HA. Piezoelectric nature of HA was proved qualitatively although a specific quantitative value for the d(14) coefficient could not be established. Ultrasound method was also employed to anisotropic elastic constants, which agreed well with those measured from the first principles.
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