The AC electrical characterization of the solid-state reaction derived CaSnO3

The potential of CaSnO3 (calcium metastannate) for its application as a cap acitor component possessing small temperature coefficient of capacitance (T CC) in electrical systems, is examined via the ac small-signal measurements . The ac electrical data were acquired on these samples sintered at various combinations of temperature-time frames (1200 degrees C less than or equal to T less than or equal to 1350 degrees C; 24 h less than or equal to t le ss than or equal to 60 h) in the frequency range from 5 Hz to 13 MHz. The m easurements were carried out over the temperature range 25-300 degrees C. T he electrical response was found to exhibit relaxation processes in more th an one complex plane formalism in a simultaneous fashion. The resistance of the sintered samples was dominated by the grain boundaries. The capacitanc e showed almost linear behavior in this measurement temperature range. The resulting electrical behavior has been discussed with the evolved microstru cture in the sintered bodies. (C) 1999 Kluwer Academic Publishers.