Preparation and Characterization of X8R Fine-Grained Dielectric Ceramics

Fine-grained BaTiO 3 -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 A...

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Veröffentlicht in:Japanese Journal of Applied Physics 2011-12, Vol.50 (12), p.121502-121502-5
Hauptverfasser: Yao, Guofeng, Wang, Xiaohui, Gong, Huiling, Wen, Hai, Li, Longtu
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Wang, Xiaohui
Gong, Huiling
Wen, Hai
Li, Longtu
description Fine-grained BaTiO 3 -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.
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