From tin oxalate to (Fe, Co, Nb)-doped SnO2: Sintering behavior, microstructural and electrical features

被引：30

作者：

Parra, R. ^{[1
,2
]}

Ramajo, L. A. ^{[1
]}

Goes, M. S. ^{[2
]}

Varela, J. A. ^{[2
]}

Castro, M. S. ^{[1
]}

机构：

[1] INTEMA CONICET UNMdP, Inst Invest Ciencia & Tecnol Mat, Mar Del Plata, Buenos Aires, Argentina

[2] Sao Paulo State Univ, UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 12期

基金：

巴西圣保罗研究基金会;

关键词：

Ceramics; Semiconductors; Chemical synthesis; Defects; Electrical properties;

D O I：

10.1016/j.materresbull.2008.03.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly reactive SnO(2)-doped nanocrystalline powders with average particle size of 20 nm and specific surface areas above 30 m(2)/g were obtained through the polymeric precursor method with tin oxalate (SnC(2)O(4)) as a chloride-free precursor for SnO(2). Powder, and sintered discs were characterized by means of X-ray powder diffraction (XRD), SEM and TEM. The influence of Co and Fe on the microstructure development and on the electrical properties of dense SnO(2)-based ceramics was studied. Co and Fe species were found to decrease in more than 70 degrees C the sintering temperature of SnO(2) with respect to mixed oxide procedures. Secondary phases enriched in Co and Fe were detected and identified in sintered samples with XRD. Current-voltage curves were registered for electrical characterization. Doping with iron increased the electrical breakdown field and a nonlinearity coefficient of 20 was achieved. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3202 / 3211

页数：10

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