Details

Autor(en) / Beteiligte

• Masó, Nahum
• Marcelot, Cecile
• Fabre, Laëtitia
• Fruhauf, Jean-Baptiste
• Dufour, Pascal
• Tenailleau, Christophe
• Warot-Fonrose, Bénédicte
• Snoeck, Etienne
• Guillemet-Fritsch, Sophie

Titel

Microstructure and electrical properties of (Ba0.6Sr0.4)0.85Bi0.1TiO3 ceramics prepared by single-step, liquid-phase, solid-state reactive sintering

Ist Teil von

• Journal of electroceramics, 2018-05, Vol.40 (3), p.197-202

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• (Ba 0.6 Sr 0.4 ) 0.85 Bi 0.1 TiO 3 ceramics have been obtained by single-step, liquid-phase, solid-state reactive sintering in the temperature range 1250–1350 °C using stoichiometric amounts of BaTiO 3 , SrTiO 3 and Bi 4 Ti 3 O 12 . Their microstructure and electrical properties have been studied by X-Ray diffraction and fluorescence, scanning and transmission electron microscopy and impedance spectroscopy. The relative density, D r , relative permittivity, ε r ′ , and dissipation factor, tan δ, at room temperature and the bulk and grain boundary resistivity, R b and R gb , and activation energies, E a b and E a gb , are approximately independent of the sintering temperature with values around e.g. D r ~97.5 %, ε r ′ ~1790, tan δ ~0.06 %, R b 500 o C ~26 kΩ cm, E a gb ~1.03 eV, R gb 500 o C ~217 kΩ cm and E a gb ~1.41 eV. By contrast, the temperature coefficient of capacitance, TCC, increases linearly from ~10 ppm o C −1 to ~21 ppm o C −1 on increasing sintering temperature. Comments on the influence of the sintering temperature on the chemical composition of the ceramics are made.