Effect of Nb2O5 content on microstructure and dielectric properties of Ba2-2xNa1-xNb5O15-5x2 ceramics

Peng Wang; Joon Hyung Lee; Jeong Joo Kim; Sang Hee Cho; Hee Young Lee

doi:10.1142/s0217979203018867

Effect of Nb₂O₅ content on microstructure and dielectric properties of Ba_2-2xNa_1-xNb₅O_15-5x2 ceramics

Peng Wang, Joon Hyung Lee, Jeong Joo Kim, Sang Hee Cho, Hee Young Lee

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7 Scopus citations

Abstract

The effect of Nb₂O₅ content on the microstructure development and the dielectric characteristics of tungsten-bronze-structured polycrystalline Ba₂Na₁Nb₅O₁₅ (BNN) ceramics was studied. The compositions of stoichiometry, Nb₂O₅-deficient and Nb₂O₅-excess BNN were prepared and sintered at 1250 °C for 2 h in oxygen. We report the development of second phases, microstructure and dielectric behavior of polycrystalline BNN ceramics, which was not reported ever. The Nb₂O₅ content affect lattice constant of the sintered body, which contributed to the change of phase transformation temperature. The stoichiometric BNN showed the lowest densification, while an optically transparent sample was obtained in Nb₂O₅-excess highly dense sample.

Original language	English
Pages (from-to)	1273-1278
Number of pages	6
Journal	International Journal of Modern Physics B
Volume	17
Issue number	8-9 I
DOIs	https://doi.org/10.1142/s0217979203018867
State	Published - 10 Apr 2003

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title = "Effect of Nb2O5 content on microstructure and dielectric properties of Ba2-2xNa1-xNb5O15-5x2 ceramics",

abstract = "The effect of Nb2O5 content on the microstructure development and the dielectric characteristics of tungsten-bronze-structured polycrystalline Ba2Na1Nb5O15 (BNN) ceramics was studied. The compositions of stoichiometry, Nb2O5-deficient and Nb2O5-excess BNN were prepared and sintered at 1250 °C for 2 h in oxygen. We report the development of second phases, microstructure and dielectric behavior of polycrystalline BNN ceramics, which was not reported ever. The Nb2O5 content affect lattice constant of the sintered body, which contributed to the change of phase transformation temperature. The stoichiometric BNN showed the lowest densification, while an optically transparent sample was obtained in Nb2O5-excess highly dense sample.",

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T1 - Effect of Nb2O5 content on microstructure and dielectric properties of Ba2-2xNa1-xNb5O15-5x2 ceramics

AU - Wang, Peng

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Cho, Sang Hee

AU - Lee, Hee Young

PY - 2003/4/10

Y1 - 2003/4/10

N2 - The effect of Nb2O5 content on the microstructure development and the dielectric characteristics of tungsten-bronze-structured polycrystalline Ba2Na1Nb5O15 (BNN) ceramics was studied. The compositions of stoichiometry, Nb2O5-deficient and Nb2O5-excess BNN were prepared and sintered at 1250 °C for 2 h in oxygen. We report the development of second phases, microstructure and dielectric behavior of polycrystalline BNN ceramics, which was not reported ever. The Nb2O5 content affect lattice constant of the sintered body, which contributed to the change of phase transformation temperature. The stoichiometric BNN showed the lowest densification, while an optically transparent sample was obtained in Nb2O5-excess highly dense sample.

AB - The effect of Nb2O5 content on the microstructure development and the dielectric characteristics of tungsten-bronze-structured polycrystalline Ba2Na1Nb5O15 (BNN) ceramics was studied. The compositions of stoichiometry, Nb2O5-deficient and Nb2O5-excess BNN were prepared and sintered at 1250 °C for 2 h in oxygen. We report the development of second phases, microstructure and dielectric behavior of polycrystalline BNN ceramics, which was not reported ever. The Nb2O5 content affect lattice constant of the sintered body, which contributed to the change of phase transformation temperature. The stoichiometric BNN showed the lowest densification, while an optically transparent sample was obtained in Nb2O5-excess highly dense sample.

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IS - 8-9 I

ER -

Effect of Nb₂O₅ content on microstructure and dielectric properties of Ba_2-2xNa_1-xNb₅O_15-5x2 ceramics

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