PRAKASAM, Mythili; ALBINO, Marjorie; LEBRAUD, Eric; MAGLIONE, Mario; ELISSALDE, Catherine; LARGETEAU, Alain

doi:10.1111/jace.14801

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PRAKASAM, Mythili
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ALBINO, Marjorie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

LEBRAUD, Eric
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of the American Ceramic Society. 2017, vol. 100, n° 6, p. 2621 - 2631

Wiley

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The present work aims to obtain Hydroxyapatite (HA) – Barium Titanate (BT) piezocomposites with improved electrical properties by retaining OH-ion and tuning BT grain size. Dense piezocomposites of HA-BT were obtained using single step Spark Plasma Sintering (SPS). The presence of OH-ions in the sintered piezocomposites of HA-BT was confirmed by high-temperature X-ray diffraction and Fourier transform infrared transmittance. No decomposition/ interaction between HA and BT phases were observed in the complete range of temperature studied. The dielectric and pyroelectric properties were studied as a function of temperature (100 K to 450 K) and frequency (100 Hz to 2 MHz). The influence of the ferroelectric grain size (300 and 500 nm) on the electrical properties of HA-BT has been analyzed. The dielectric permittivity of HA-BT ceramics can be enhanced with appropriate ferroelectric grain size and volume fraction of BT (<80%).< Réduire

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Pyroelectric

Electrical properties

Dielectric

Biocomposites

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Hydroxyapatite-barium titanate piezocomposites with enhanced electrical properties

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