journal article·2012-04

Spark-plasma-sintering temperature dependence of structural and piezoelectric properties of BNT–BT0.08 nanostructured ceramics

Marin Cernea, Fabio Fochi, Gheorghe Virgil Aldica, Bogdan Stefan Vasile, Roxana Trusca, Carmen Galassi

Journal of Materials Science· Volume 47· Issue 8
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Abstract

(Bi0.5Na0.5)TiO3 doped with 8 mol% BaTiO3 powder prepared by sol-gel was compacted and sintered by spark-plasma-sintering method. The influence of sparkplasma-sintering temperature on the densification and piezoelectric properties of these ceramics was studied. Starting from BNT-BT0.08 powder gel with a microstructure consisting of particles with average size of 50 nm, ceramics with grain size of 60-90 nm and density of about 98.9-99.6% of the theoretical density were obtained by spark-plasma-sintering at 800-900 C. Increasing the sintering temperature by SPS from 800 to 900 C lead to the increase of d33, kp, e33 T and, decrease of Qm. Typical d33 and kp values of BNT-BT0.08 ceramics sintered by sparkplasma- sintering at 900°C were 8 and 0.029, respectively.
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Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Acoustic Wave Resonator Technologies

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