Microwave Dielectric Properties of BiMg2VO6 Ceramic with Low Sintering Temperature

doi:10.15541/jim20140298

Abstract

Abstract:

A low firing microwave dielectric ceramic BiMg₂VO₆ was prepared via conventional solid state reaction method. The chemical compatibility, phase, morphology, density and microwave dielectric properties of the ceramic in the sintering temperature range of 720~840℃ were studied. The infrared reflectivity spectra of the ceramic were measured. Results showed that the BiMg₂VO₆ ceramics did not react with Ag at 780℃ and the relative densities of the samples were greater than 93.8% at every sintering temperature conditions. Ceramic sintered at 780℃ for 2 h showed the optimum microwave dielectric properties with permittivity of 13.34, Q×f value of 15610 GHz (f= 8.775 GHz) and temperature coefficient value of -87.2×10^-6/℃. The optical frequency permittivity was 3.4 and the extrapolated value to microwave frequency was 13.5. The optimum microwave dielectric properties and low sintering temperature of BiMg₂VO₆ ceramic enable it a promising candidate for low temperature co-fired ceramic applications.

Key words: BiMg2VO6, microwave dielectric properties, sintering behavior

CLC Number:

TQ174

XIE Hui-Dong, XI Hai-Hong, LI Fei, CHEN Chao. Microwave Dielectric Properties of BiMg₂VO₆ Ceramic with Low Sintering Temperature[J]. Journal of Inorganic Materials, 2015, 30(2): 202-206.

Figures/Tables 5

Fig. 1 X-ray diffraction patterns of BiMg2VO6 ceramic and co-fired ceramic

Fig. 2 Secondary electron images (a-e), backscattered electron image (f) and its energy dispersive spectra (g, h) of the as-co-fired BiMg2VO6 surfaces sintered at 720℃(a), 740℃(b), 760℃(c), 780℃(d) and 840℃(e) for 2 h

Fig. 3 Apparent and relative densities of BiMg2VO6 ceramics as a function of sintering temperature

Fig. 4 Microwave dielectric properties (permittivity, Q×f value) of BiMg2VO6 ceramics as a function of sintering temperature

Fig. 5 Imaginary part of complex permittivity(a), real part of complex permittivity (b) and fitted and measured infrared reflectivity spectra (c) of BiMg2VO6 ceramic sintered at 780℃

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Microwave Dielectric Properties of BiMg₂VO₆ Ceramic with Low Sintering Temperature

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