Microwave dielectric properties of (1 − x)ZnNb2O6–xBa(Zn1/3Nb2/3)O3 compound ceramic with near zero temperature coefficient
| Autor: | Xianfu Luo, Luchao Ren, Hongqing Zhou, Qinglin Cao, Qinxian Jiang, Wentao Xie |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry Sintering 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics Mole fraction Microstructure 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Grain growth visual_art 0103 physical sciences visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering 0210 nano-technology Temperature coefficient Perovskite (structure) |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:2170-2174 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-017-8129-2 |
| Popis: | The phase composition, microstructures, sintering behavior, and microwave dielectric properties of (1 − x)ZnNb2O6–xBa(Zn1/3Nb2/3)O3 (x = 0.25, 0.30, 0.35, 0.40) ceramics prepared via conventional solid-state route were systematically investigated as a function of x value and sintering temperature. The ixiolite ZnNb2O6, perovskite Ba(Zn1/3Nb2/3)O3, and a minor phase of Ba3Zn1/3Nb14/3O15 were obtained throughout the studied compositional range. The variation of bulk density and dielectric properties are related to the x value. With increasing molar fraction of Ba(Zn1/3Nb2/3)O3, the temperature coefficient of resonant frequency (τ f ) value decreased, and a near-zero τ f value could be obtained for the samples with x = 0.30. The optimum microwave dielectric properties with an e r value of 31.22, a Q × f value of 39,611 GHz (at 5.5 GHz), and a τ f value of − 2.28 ppm/°C were obtained for 0.7ZnNb2O6–0.3Ba(Zn1/3Nb2/3)O3 ceramics sintered at 1200 °C for 4 h, which showed dense microstructures as well as well-developed grain growth. |
| Databáze: | OpenAIRE |
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