Stoichiometric control in Bi4Ti3O12 synthesis by novel hybrid solid state reaction

C. Gadea*, N. Phatharapeetranun, B. Ksapabutr, J.-C. Grivel, V. Esposito

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The synthesis of bismuth titanate Bi4Ti3O12 (BiT) is performed via a novel solid state reaction. The reaction is designed to control the stoichiometric content of the highly volatile element, i.e. Bi. The chemical route consists in trapping bismuth oxide colloids in a stabilized titanium based sol gel solution. The resulting colloidal-solution hybrid ink can be processed via various ceramic processes. After gelation of TiO2 in the sol-gel component the mixture reacts at high temperature (850 °C) to yield the BiT phase. The obtained material is c-axis oriented, and its lattice parameters, shrinkage and density matches the pure Bi4Ti3O12 phase. The sintered material exhibits enhanced higher dielectric constant (2 3 2) than usually reported for this phase.
Original languageEnglish
JournalMaterials Letters
Volume221
Pages (from-to)101-103
ISSN0167-577X
DOIs
Publication statusPublished - 2018

Keywords

  • Bismuth titanate
  • Synthesis
  • Sol-gel
  • Colloids
  • Dielectric

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