Effect of the sintering temperature on the Ba(Zn1/3Ta2/3)O3 dielectric properties

Barium zinc tantalate, with Zn and Ta in the ratio 1:2, was synthesised by solid state reaction. The mixed powders were calcined at 925 C, milled, and then calcined at 1000 C. Pressed specimens were sintered in air at 1150 C for 2.5 h, and finally at 1400-1600 C in air for 4 h. The specimens exhibit...

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Published in:Journal of the European Ceramic Society 2007, Vol.27 (2-3), p.1117-1122
Main Authors: IOACHIM, A, TOACSAN, M. I, BANCIU, M. G, NEDELCU, L, DUTU, C. A, FEDER, M, PLAPCIANU, C, LIFEI, F, NITA, P
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
Technical ceramics
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cited_by cdi_FETCH-LOGICAL-c239t-efa31939d60eff6f68503eb70227b3cdfa5ce95bf50ffbaaca479fe35e22af953
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container_title Journal of the European Ceramic Society
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creator IOACHIM, A
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NITA, P
description Barium zinc tantalate, with Zn and Ta in the ratio 1:2, was synthesised by solid state reaction. The mixed powders were calcined at 925 C, milled, and then calcined at 1000 C. Pressed specimens were sintered in air at 1150 C for 2.5 h, and finally at 1400-1600 C in air for 4 h. The specimens exhibited low loss at microwave frequencies, the dielectric loss decreasing with increasing sintering temperature. Particularly low dielectric loss was achieved by annealing for 10 h at 1400 C. The lowest loss corresponded to completely ordered material with a strongly distorted unit cell. Dielectric loss was little influenced by porosity. The well-sintered and annealed specimens had a dielectric constant of about 31 and a quality factor of up to 130000. 7 refs.
doi_str_mv 10.1016/j.jeurceramsoc.2006.05.023
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subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
Technical ceramics
title Effect of the sintering temperature on the Ba(Zn1/3Ta2/3)O3 dielectric properties
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