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Electrophoretic Deposition of Ferroelectric Composites for Applications in Electronic Scanning Systems

  • E. Ngo (a1), P.C. Joshi (a2), M. W. Cole (a2) and C. W. Hubbard (a2)

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.

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References

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1. Babbit, R.W, Koscica, T.E., and Drach, W.E., Microwave J., 35, 63 (1992).
2. Joshi, P.C. and Cole, M., Mat. Res. Soc. Symp. Proc., Spring 2000 (to be published).
3. Sarkar, P. and Nicholson, P. S., J. Amer. Ceram. Soc. 79, 1987 (1996).

Electrophoretic Deposition of Ferroelectric Composites for Applications in Electronic Scanning Systems

  • E. Ngo (a1), P.C. Joshi (a2), M. W. Cole (a2) and C. W. Hubbard (a2)

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