Details

Autor(en) / Beteiligte

• Zhang, Yun
• Zhang, Yingchun
• Fu, Baojian
• Hong, Ming
• Xiang, Maoqiao
• Liu, Zhiang
• Leng, Jiaxun

Titel

Microstructure and microwave dielectric properties of MgNb^sub 2^O^sub 6^-ZnTa^sub 2^O^sub 6^ composite ceramics prepared by layered stacking method

Ist Teil von

• Journal of materials science. Materials in electronics, 2014-12, Vol.25 (12), p.5475

Ort / Verlag

New York: Springer Nature B.V

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ZnTa^sub 2^O^sub 6^/MgNb^sub 2^O^sub 6^/ZnTa^sub 2^O^sub 6^ layered ceramics with different volume fractions were designed and prepared to tailor the microwave dielectric properties of ZnTa^sub 2^O^sub 6^-MgNb^sub 2^O^sub 6^ composite ceramics. The crystal structure, microstructure and microwave dielectric properties of the composite ceramics were systematically investigated in this work. The formation of solid solutions at interface was confirmed by X-ray diffractometer. Scanning electron microscopy and energy dispersive spectroscopy were used to analysis the ionic diffusion behavior across the interface. The typical core-shell structure based on MgNb^sub 2^O^sub 6^ solid solution was clearly discerned in the composite ceramics. The ionic diffusion coefficients simulated by semi-infinite diffusion couple could give a reasonable explanation for the formation of the special structure. The tri-layered ZnTa^sub 2^O^sub 6^/MgNb^sub 2^O^sub 6^/ZnTa^sub 2^O^sub 6^ ceramic with the volume fraction of 6:1:6 had the optimum microwave dielectric properties of [straight epsilon] ^sub r^ = 31.98, Q × f = 82,778 GHz, and τ ^sub f^ = 0 ppm/°C, demonstrating a unique potential for low-loss microwave applications in resonators, filters and antenna substrates.[PUBLICATION ABSTRACT]