ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Barium titanate ferroelectric films on Pt substrates were fabricated by electrophoreticdeposition (EPD) technique. The barium titanate films sintered at different temperature (600°C,900°C, 1050°C, 1150°C, 1200°C) for 2h, which were prepared via repeated EPD-sintering route 2~3times were sufficiently dense and had uniform microstructure. The XRD pattern and SEMmicrophotography have been measured in order to investigate the effects of the final annealingtemperature on the phase compositions and microstructure of the film. The experiment results showedthat barium titanate films were crystallized into the tetragonal phase at 1050°C and above. The roomtemperature dielectric constant (ε) and loss tangent (tanδ) at 1kHz were respectively determined fordifferent samples sintered at 600°C, 900°C, 1050°C, 1150°C and 1200°C. Both ε and tanδ showedanomaly peaks at 125°C. The results showed that typical BaTiO3 films sintered at 1050°C havinghigher dielectric constant (ε=2300) and lower dielectric loss (tanδ=0.02). The room temperatureremanant polarization (Pr) and coercive field (EC) were found to be 1.9μC/cm2 and 35kV/cm,respectively
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.87.pdf
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