Effect of mechanochemical activation on the synthesis of NaNbO3 and processing of environmentally friendly piezoceramics

被引：35

作者：

Hungría, T ^{[1
]}

Pardo, L ^{[1
]}

Moure, A ^{[1
]}

Castro, A ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 395卷 / 1-2期

关键词：

ferroelectrics; high-energy ball milling; X-ray diffraction; dielectric response;

D O I：

10.1016/j.jallcom.2004.10.067

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：

High-energy milling has been applied to obtain NaNbO3 ceramic precursor powders and dense ceramics by a one-step thermal treatment. Stoichiometric mixtures of Nb2O5 and different sodium reactants (Na2CO3, Na2O and NaOH) were mechanically activated. The obtained results are discussed regarding the starting reactants and the milling media. The evolution of the powder mixtures and the thermal behavior of the activated samples were investigated by X-ray powder diffraction and thermal analysis. The most crystalline NaNbO3 powders were obtained when a 2NaOH/Nb2O5 mixture was homogenized using a wet-chemistry technique followed by mechanochemical activation in a planetary mill and treated at 900 degrees C for 2 h. Dense ceramics were processed from the different precursors by conventional-sintering and hot-pressing and their microstructure and piezoelectric properties characterized. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：166 / 173

页数：8

共 31 条

[1] AUTOMATIC-DETERMINATION OF COMPLEX CONSTANTS OF PIEZOELECTRIC LOSSY MATERIALS IN THE RADIAL MODE [J].