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Effect of nonstoichiometry on the structure and microwave dielectric properties of Ba1 − x (Zn1/2W1/2)O3 − x and Ba(Zn1/2 − y W1/2)O3 − y/2

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Abstract

We have synthesized Ba1 − x (Zn1/2W1/2)O3 − x and Ba(Zn1/2 − y W1/2)O3 − y/2 barium tungstates with different deviations from cation stoichiometry (x = 0.01–0.05, y = 0.01–0.05), determined the phase composition of ceramics fabricated from the tungstates, and investigated their electrical properties. Even slight deviations from cation stoichiometry in Ba(Zn1/2W1/2)O3 lead to the formation of the scheelite phase BaWO4, and its content increases with heat-treatment temperature. Barium or zinc deficiency in the systems studied improves the sintering behavior of Ba(Zn1/2W1/2)O3 and increases the degree of 1: 1 B-site cation ordering, which in turn ensures an increase in microwave quality factor, Q.

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Authors and Affiliations

  1. Vernadsky Institute of General and Inorganic Chemistry, National Academy of Sciences of Ukraine, pr. Akademika Palladina 32/34, Kiev, 03142, Ukraine

    D. A. Durilin, O. V. Ovchar & A. G. Belous

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  1. D. A. Durilin
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  2. O. V. Ovchar
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  3. A. G. Belous
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Correspondence to A. G. Belous.

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Original Russian Text © D.A. Durilin, O.V. Ovchar, A.G. Belous, 2011, published in Neorganicheskie Materialy, 2011, Vol. 47, No. 3, pp. 364–367.

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Durilin, D.A., Ovchar, O.V. & Belous, A.G. Effect of nonstoichiometry on the structure and microwave dielectric properties of Ba1 − x (Zn1/2W1/2)O3 − x and Ba(Zn1/2 − y W1/2)O3 − y/2 . Inorg Mater 47, 313–316 (2011). https://doi.org/10.1134/S0020168511030083

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  • DOI: https://doi.org/10.1134/S0020168511030083

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