Synthesis and sintering of ultra fine NaNbO3 powder by use of polymeric precursors

被引：77

作者：

Nobre, MAL

Longo, E

Leite, ER

Varela, JA

机构：

[1] UNIV FED SAO CARLOS, DEPT QUIM, BR-13565905 SAO CARLOS, SP, BRAZIL

[2] UNESP, INST QUIM, BR-14800900 ARARAQUARA, SP, BRAZIL

来源：

MATERIALS LETTERS | 1996年 / 28卷 / 1-3期

基金：

巴西圣保罗研究基金会;

关键词：

sodium niobate; NaNbO3; powder; polymeric precursors; synthesis; high density compacts; antiferroelectric;

D O I：

10.1016/0167-577X(96)00062-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultra-fine NaNbO3 powder was prepared by the use of polymeric precursors. X-ray diffraction (XRD) results showed that this niobate nucleates from the amorphous precursor, with no intermediate phases, at low temperature (500 degrees C). Studies by XRD and nitrogen adsorption/desorption showed that powders with high crystallinity (approximate to 100%) and high surface areas (> 20 m(2)/g) are obtained after calcination at 700 degrees C for 5 h. Compacts of calcined powders showed high sinterability reaching 98% of theoretical density when sintered at 1190 degrees C for 3 h.

引用

页码：215 / 220

页数：6

共 13 条

[1]

*ASAP, 1991, OP MAN

[2] On a theory of the van der Waals adsorption of gases [J].