☆ 4.7 Article

Microstructure, phase evolution and interfacial effects in a new Zn0.9Mg0.1TiO3-ZnNb2O6 ceramic system with greatly induced improvement in microwave dielectric properties

SCRIPTA MATERIALIA (2018)

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Journal

SCRIPTA MATERIALIA
Volume 146, Issue -, Pages 154-159

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.11.025

Keywords

Zn0.9Mg0.1TiO3-ZnNb2O6 ceramics; Microwave dielectric properties; Structural evolution; ZnO inhibitor; Interfacial effect

Categories

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

Funding

  1. National Natural Science Foundation [51672220]
  2. 111 Program of MOE [B08040]
  3. National Defense Science Foundation [32102060303]
  4. Xi'an Science and Technology Foundation [CXY1706-5, 2017086CGRC049-XBGY005]
  5. Shaanxi Provincial Science Foundation [2017KW-018]
  6. NPU Gaofeng Project of China [17GH020824]

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Zn0.9Mg0.1TiO3-ZnNb2O6 (ZMT-ZN) ceramics was synthesized and characterized successfully for the first time, and phase conversion to secondary phases was largely restrained due to the introduction of ZnO nano inhibitors. Excellent microwave dielectric properties and optimal.combination were achieved for the ceramics sintered at 1100 degrees C, i.e., epsilon(r) = 27.5, Q x f= 75,000 GHz, T-f = 3.8 ppm/degrees C. Particularly, the comparatively insulated inter layers were considered as the key mechanism to impede transportation or transfer of defects and surface polarization charges. Considering the merits of facile, low cost and simple process, this series of ZMT-ZN ceramics are promising new candidates for ultra-low microwave devices. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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