New method to obtain stable small-sized SnO2 powders for gas sensors

被引：30

作者：

Cirera, A

Diéguez, A

Diaz, R

Cornet, A

Morante, JR

机构：

[1] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain

[2] Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 58卷 / 1-3期

关键词：

SnO2; gas sensor; liquid pyrolysis; nanocrystalinity; oxygen vacancies; grain growth;

D O I：

10.1016/S0925-4005(99)00097-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new method based on the pyrolytic reaction of SnCl4 . 5(H2O) in the range of 400-900 degrees C is reported to produce stable small gains of SnO2 from 6 to 34 nm. The characterisation of these nanocrystallites is discussed, giving important results about oxygen incorporation to the SnO2 lattice and grain growth. This allows the understanding of the crystalline features of the samples. The influence of this new method on grain growth topics (nucleation, Ostwald ripening, coalescence) is discussed. Examples of the CO and NO2 detection are reported, showing its relation with structural parameters. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：360 / 364

页数：5

共 5 条

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