Abstract
BaTiO3 thin films were prepared by ink-jet printing aqueous solutions of TiO2
sol and soluble Ba salts. Higher pH values (pH > 13) as well as
higher than stoichiometric Ba (Ba:Ti = 1.1:1) salt additions were
required to compensate for the different aqueous solubilities of the Ba
and the Ti. Impedance spectroscopy of the samples shows the thin film
samples to have similar activation energy with bulk samples prepared
through low temperature aqueous synthesis. The relative permittivity of
the thin films (∼ 280) was lower than the bulk pellets (∼ 2750) which
was attributed to the lower temperature heat treatment for the thin
films.
Keywords
- Sol–gel preparation;
- Dielectrics;
- Thin films
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