Low-temperature synthesis of Mg4Nb2O9 nanopowders by high-energy ball-milling method

被引：33

作者：

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

Liu, Peng ^{[1
]}

Chen, Xiao-Ming ^{[1
]}

Ma, Jian-Li ^{[1
]}

Zhang, Huai-Wu ^{[3
]}

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

[3] Univ Elect Sci & Technol China, Key Lab Elect Thin Film & Integrated Devices, Chengdu 610054, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 493卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Mechanical alloying; Oxide materials; Nanopowders; X-ray diffraction; LEAD-MAGNESIUM NIOBATE; CALCINATION CONDITION; CRYSTAL-STRUCTURE; LUMINESCENCE; PHASE; OXIDE;

D O I：

10.1016/j.jallcom.2009.12.122

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of high-energy ball milling and subsequent calcinations on the mixture of MgO and Nb2O5 were investigated. It was found that the formation temperature of the single-phase Mg4Nb2O9 powders had a consanguineous connection with milling time, calcinations temperature and dwell time. With increasing milling time, calcinations temperature and dwell time, the qualitative concentration of Mg4Nb2O9 phase increased. Pure Mg4Nb2O9 nanopowders with average particle size of 72.5 nm were primary synthesized at 900 degrees C for 3 h from 60 h powders. The Mg4Nb2O9 ceramics with almost full density and an excellent microwave dielectric properties (epsilon(r) = 12.6, Q x f = 175,810 GHz) were obtained after annealing at 1200 degrees C from the milled 60 h powders. (C) 2010 Elsevier BM. All rights reserved.

引用

页码：441 / 444

页数：4

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