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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Influence of Phase Composition on Dielectric...

Influence of Phase Composition on Dielectric Properties of Bismuth-Based Ceramics with Scheelite-Type Structure

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Abstract:

Goal of the present research was to study dielectric properties of BiNbO₄ ceramics fabricated by solid state reaction route followed with pressureless sintering. The samples were fabricated from the mixture of oxides, viz. Nb₂O₅ and Bi₂O₃. Apart from stoichiometric amount an excess of 3%, 5% and 10% by mole of Bi₂O₃ was used. It was found that an excess amount of Bi₂O₃ oxide caused formation of Bi₅Nb₃O₁₅ minor phase in amount of 9wt%, 18wt% and 25wt%, respectively. The dielectric properties were studied by impedance spectroscopy within the frequency range ν=20Hz1MHz and temperature range T=RT550°C. It was found that the presence of the minor phase in amount of 18wt% caused a decrease in dielectric losses of the material under studies.

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High-Performance Ceramics VIII

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Periodical:

Key Engineering Materials (Volumes 602-603)

Pages:

683-688

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.683

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Online since:

March 2014

Authors:

Dionizy Czekaj*, Agata Lisińska-Czekaj

Keywords:

BiNbO₄ Ceramics, Dielectric Property, Impedance Spectroscopy, Micromechatronic Materials

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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