Piezoelectricity and phase transitions of the mixed-layer bismuth titanate niobate Bi{sub 7}Ti{sub 4}NbO{sub 21}

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb09099.x· OSTI ID:136519

Chu, F; Damjanovic, D; Steiner, O; Setter, N ^[1]

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1. Ecole Polytechnique Federale de Lausanne (Switzerland). Lab. de Ceramique

The piezoelectric properties of the bismuth titanate niobate Bi{sub 7}Ti{sub 4}NbO{sub 21} have been studied. The two phase transitions at 677 and 856 C are analyzed based on the measured piezoelectric properties. It is shown that the Bi{sub 7}Ti{sub 4}NbO{sub 21} compound is a ferroelectric until 856 C. Bi{sub 3}TiNbO{sub 9} clusters are shown to exist within Bi{sub 7}Ti{sub 4}NbO{sub 21} grains. These clusters may be responsible for the small additional piezoelectric activity of the studied material at temperatures higher than 856 C.

• Sponsoring Organization: USDOE
• OSTI ID: 136519
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 11 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
FERROELECTRIC MATERIALS
NIOBIUM OXIDES
PERMITTIVITY
PIEZOELECTRICITY
SAMPLE PREPARATION
TEMPERATURE DEPENDENCE
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION