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Inne
Piezoelectricity in poled hydroxyapatite ceramics.
Autorzy
Rok wydania
2014
Czasopismo
Journal of the American Ceramic Society
Numer woluminu
97
Strony
2867-2872
DOI
10.1111/jace.13045
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Direct current electrical poling of textured hydroxyapatite(HAp) ceramics is reported here to exhibit weak ferroelectric-ity and pyroelectricity, but a remarkably higher (six orders ofmagnitude) piezoelectricity. The piezoelectric strain coefficientis an order higher than that of bone and of the same order asthat of quartz crystal and uncalcified collagen in tendon. Thepiezoelectric charge coefficient is an order higher than bone,and three orders higher than that of tendon. Piezoelectric con-stants of poled HAp ceramics are high enough to have physio-logical relevance such as in the use of bone grafts forstimulated calcification or in energy harvesting from physiolog-ical motions. Piezoelectricity in these ceramics can be tuned bycontrolling texture, and poling parameters. The density ofpower that can be harvested from HAp ceramics is currentlyjust one order lower than biocompatible ferroelectric ceramicsuch as barium titanate.
Adres publiczny
http://dx.doi.org/10.1111/jace.13045
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