Kinetic study and modeling of grain growth in a BaTiO<sub>3

Françoise Gelebart; Michèle Pijolat; Michel Soustelle; Claude Magnier

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Kinetic study and modeling of grain growth in a BaTiO₃

Françoise Gelebart ^{1, 2} Michèle Pijolat ^{2, 1} Michel Soustelle ^{1, 2} Claude Magnier ³

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels

2 ProcESS-ENSMSE - Département Procédés et évolution des systèmes avec solides

3 Rhône-Poulenc Recherche

Abstract : Kinetic of grain in a BaTiO₃ powder was studied at 850°C in a various gaseous atmosperes and for different Ba/Ti ratios. The decrease in surface area from about 8m²/g to 2m²/g waas used to obtain the experimental rate of grain growth versus the partial pressure of water vapour (wich was found to accelerate the process) and versus the Ba/Ti ratio. A kinetic model involving eight elementary steps and the point defects of BaTiO₃

Keywords : kinetic model grain growth BaTiO₃ Ba/Ti ratio gaseous atmospheres water vapour pressure point defects

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Domain :

Engineering Sciences [physics] / Chemical and Process Engineering

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https://hal-emse.ccsd.cnrs.fr/emse-00610286
Contributor : Andrée-Aimée Toucas <>
Submitted on : Thursday, July 21, 2011 - 2:50:41 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:16 PM

Kinetic study and modeling of grain growth in a BaTiO₃

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Kinetic study and modeling of grain growth in a BaTiO₃