Fabrication nanopowders by high-energy ball-milling and low temperature sintering Li2TiO3 microwave dielectrics

被引：13

作者：

Fu, Zhi-Fen ^{[1
,2
]}

Liu, Peng ^{[1
]}

Ma, Jian-Li ^{[2
]}

机构：

[1] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710062, Peoples R China

[2] Anhui Univ Sci & Technol, Coll Sci, Huainan 232001, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2015年 / 193卷

基金：

中国国家自然科学基金;

关键词：

Sintering; Ceramics; Microstructure; Microwave dielectrics; PHASE-TRANSITION; CERAMICS; MICROSTRUCTURE; POWDERS;

D O I：

10.1016/j.mseb.2014.11.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, Li2TiO3 nanopowders were synthesized via a high-energy ball-milling process followed by calcinations and Li2TiO3 ceramics were fabricated by solid-state reaction. The microstructure and microwave dielectric properties of Li2TiO3 ceramics were also investigated systematically. Li2TiO3 nanopowders with an average particle size of 86.7 nm were derived at 600 degrees C for 2 h. X-ray diffraction patterns exhibited that single monoclinic structure of the Li2TiO3 ceramics were obtained at an optimum sintering temperature of 1000 degrees C for 2 h by using low temperature synthesis nanopowders as a precursor. The samples of Li2TiO3 ceramics with grain sizes in the range of 1.5-5.0 mu m showed dense microstructures and excellent microwave dielectric properties (epsilon(r) = 16.4, Q x f = 54,326 GHz, tau(f) = 27.4 ppm/degrees C). All these results illustrated that high-energy ball-milling method is a simple and practical route to produce Li2TiO3 ceramics for microwave applications. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：32 / 36

页数：5

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