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Electrophoretic Deposition of Ferroelectric Composites for Applications in Electronic Scanning Systems

Published online by Cambridge University Press:  21 March 2011

E. Ngo ,
P.C. Joshi ,
M. W. Cole  and
C. W. Hubbard
E. Ngo
Affiliation:
Army Research Laboratory Weapons and Materials Directorate Attn: AMSRL-WM-MC; Building 4600 Email: engo@arl.mil Aberdeen Proving Ground, MD 21005, U.S.A
P.C. Joshi
Affiliation:
Army Research Laboratory Weapons and Materials Directorate Attn: AMSRL-WM-MC; Building 4600
M. W. Cole
Affiliation:
Army Research Laboratory Weapons and Materials Directorate Attn: AMSRL-WM-MC; Building 4600
C. W. Hubbard
Affiliation:
Army Research Laboratory Weapons and Materials Directorate Attn: AMSRL-WM-MC; Building 4600
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Abstract

We have investigated the electrophoretic deposition (EPD) as a low cost and conformal method of fabricating barium strontium titanium (BST) based composite thick films. The films were deposited at a controlled rate on platinum substrate in acetone-based slurry under electric bias. Acetone-aerosol OTS surfactant dispersion was used as dispersive medium. Conformal BST based thick films of 10-80 μm were obtained. The dielectric constant and dielectric loss factor of Ba0.60Sr0.40TiO3 and Ba0.60Sr0.40TiO3 – 20wt% compositions were 603.3 and 0.029 and 327.0 and 0.002, respectively. The low frequency electronic properties of the electrophoretic films were also compared with those of the bulk BST ceramics. In addition, the optical and the structural properties of the films are also discussed. The various techniques employed include x-ray diffraction, SEM and surface profilometer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 655 , 2000 , CC12.8.1
Copyright
Copyright © Materials Research Society 2001

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References

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