Fabrication of La-Doped Bi4Ti3O12 Ceramics

Agata Lisińska-Czekaj; Henryk Bernard; Katarzyna Osinska; Jolanta Dzik; Dionizy Czekaj

doi:10.4028/www.scientific.net/MSF.730-732.105

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HomeMaterials Science ForumMaterials Science Forum Vols. 730-732Fabrication of La-Doped Bi4Ti3O12 Ceramics

Fabrication of La-Doped Bi₄Ti₃O₁₂ Ceramics

Abstract:

La-modified Bi₄Ti₃O₁₂ is a typical ferroelectric, piezoelectric and electro-optic material, having relatively low coercive field, low dielectric constant, high Curie temperature and high breakdown strength. Goal of the present research was to apply mixed oxide method for fabrication of BiTLax ceramics, study its chemical composition, crystalline structure and microstructure. The compound BiTLax for x=0, 0.25, 0.5, 0.75 ceramic powders were prepared from mixture of oxides by a solid state reaction at T=1000°C for t=3h. Ceramic powders of BiTLax were next press and the compacts were sintered by the free sintering at temperature T=1000°C with the soaking time t=2h. A crystal structure Bi-layered structured of ferroelectrics was confirmed by a X-ray diffraction. It was found that La-doped BiT ceramics sintered at T=1000°C adopted the monoclinic symmetry. Influence of La-doping on chemical composition and microstructure of BiTLa ceramics was studied by scanning electron microscopy HITACHI S-4700 and energy dispersion spectroscopy.

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Materials Science Forum (Volumes 730-732)

Pages:

105-110

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.730-732.105

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Online since:

November 2012

Authors:

Agata Lisińska-Czekaj, Henryk Bernard, Katarzyna Osinska, Jolanta Dzik, Dionizy Czekaj

Keywords:

Bi₄Ti₃O₁₂ Ceramics, Crystal Structure, La-doping, Microstructure

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