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Preparation and characterization of X8R fine-grained dielectric ceramics

Japanese Journal of Applied Physics, ISSN: 0021-4922, Vol: 50, Issue: 12
2011
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Article Description

Fine-grained BaTiO-based nonreducible ceramics were obtained by a conventional mixing method and the dielectric and electrical properties were characterized. The average grain size was less than 200 nm. The materials provided a dielectric constant of 1300 and satisfied the Electronic Industries Association (EIA) X8R specification. Fine-grained ceramics showed a better performance under a direct current (DC) field at high temperatures, compared with coarse-grained ceramics. Impedance analysis was conducted to determine the activation energy and to evaluate the ionic transference number. Moreover, capacitance variation under a DC field was also largely improved for fine-grained ceramics and relative mechanisms were examined. © 2011 The Japan Society of Applied Physics.

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