Effect of BaWO4 on microstructure microwave dielectric properties of Ba(Mg1/3Nb2/3)O3

“…The BDS of the ceramics can be improved through increasing density, eliminating large size pore and reducing the grain size [2][3][4]. Because the relative density of all the xSrZrO 3 -(1−x)SrTiO 3 (x≥0.01) specimens is higher than 96%, the effect of density on the dielectric properties can be neglected [9]. Therefore, in the present study, the decrease of the grain size may be one of factors to explain the change in the dielectric loss and the BDS values of the specimens.…”

Section: Resultsmentioning

confidence: 99%

The microstructures and dielectric properties of xSrZrO3–(1−x)SrTiO3 ceramics

Cao

et al. 2007

J Electroceram

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In this paper, the microstructures and the dielectric properties of xSrZrO 3 -(1−x)SrTiO 3 (x=0.01, 0.03, 0.05, and 0.07) ceramics were investigated. The composition can form a single-phase structure solid solution as x increases from 0.01 to 0.07, and the average grain size decreases from 15 to 2 μm with the x increasing. With the variation of SrZrO 3 content, dielectric constant, dielectric loss, and breakdown strength (BDS) of xSrZrO 3 -(1−x)SrTiO 3 samples are changed. When x=0.05, the samples exhibit high BDS more than 14 kV/mm and low dielectric loss about 1×10 −3 with dielectric constant of 330. It can be a candidate material of energy storage for pulsed power application.

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“…Where ρ 1 and ρ 2 are the theoretical density of Ba 5 Nb 4 O 15 and BaWO 4 , 6.32 g/cm 3 for Ba 5 Nb 4 O 15 phase and 6.38 g/cm 3 for BaWO 4 phase 16 . W 1 and W 2 are the weight fraction of Ba 5 Nb 4 O 15 and BaWO 4 .…”

Section: Methodsmentioning

confidence: 99%

Low‐Temperature Sintering and Microwave Dielectric Properties of Ba₅Nb₄O₁₅–BaWO₄ Composite Ceramics for LTCC Applications

Zhuang¹,

Yue²,

Zhao³

et al. 2008

Journal of the American Ceramic Society

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Low‐temperature‐sintered composite ceramics in Ba5Nb4O15–BaWO4 system were prepared by cofiring mixtures of Ba5Nb4O15 and BaWO4 powders. Thermo‐mechanical analysis indicated that a small amount of B2O3 addition significantly promoted the densification process and lowered the sintering temperature to ∼900°C. X‐ray diffraction analysis revealed that Ba5Nb4O15 and BaWO4 coexisted in the sintered ceramics. With increasing B2O3 content, a secondary phase, BaNb2O6, appeared which affects the microwave dielectric properties. Microwave dielectric properties of the aforementioned compositions were as follows: dielectric constant of 16.8–19.2, Q×f values of 33 900–50 300 GHz, and a temperature coefficient of the resonant frequency of −3.4 to −8.6 ppm/°C. The chemical compatibility of BNW6502 ceramics with silver during the cofiring process has also been investigated, and no evidence of chemical reaction between Ag and ceramics was observed, indicating that the as‐prepared composite ceramics are suitable for low‐temperature cofired ceramics applications.

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Effect of BaWO4 on microstructure microwave dielectric properties of Ba(Mg1/3Nb2/3)O3

Cited by 31 publications

References 20 publications

Microstructure and microwave dielectric properties of Ba5Nb4O15–BaWO4 composite ceramics

Microstructure and microwave dielectric properties of Ba5Nb4O15–BaWO4 composite ceramics

The microstructures and dielectric properties of xSrZrO3–(1−x)SrTiO3 ceramics

Low‐Temperature Sintering and Microwave Dielectric Properties of Ba₅Nb₄O₁₅–BaWO₄ Composite Ceramics for LTCC Applications

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Effect of BaWO4 on microstructure microwave dielectric properties of Ba(Mg1/3Nb2/3)O3

Cited by 31 publications

References 20 publications

Microstructure and microwave dielectric properties of Ba5Nb4O15–BaWO4 composite ceramics

Microstructure and microwave dielectric properties of Ba5Nb4O15–BaWO4 composite ceramics

The microstructures and dielectric properties of xSrZrO3–(1−x)SrTiO3 ceramics

Low‐Temperature Sintering and Microwave Dielectric Properties of Ba5Nb4O15–BaWO4 Composite Ceramics for LTCC Applications

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Product

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Low‐Temperature Sintering and Microwave Dielectric Properties of Ba₅Nb₄O₁₅–BaWO₄ Composite Ceramics for LTCC Applications