Development of temperature-stable thick-film dielectrics. II. Medium-K dielectric

For pt.I see ibid., vol.12, no.4, p.789-97 (1989). A temperature-stable, medium dielectric constant (K=100) thick-film dielectric is developed for high-temperature electronic instrumentation. A theoretical model predicts a temperature-insensitive dielectric in the glass-Bi/sub 4/Ti/sub 3/O/sub 12/-SrTiO/sub 3/ system, while experimental results suggest an optimum composition in the glass-SrTiO/sub 3/-BaTiO/sub 3/ system. Interfacial polarization is the major factor which causes the deviation. The medium-K dielectric, when properly fired, terminated, and heat-treated, can work adequately from 25 degrees C to 400 degrees C.<
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