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

共 29 条

[21] Analysis of secondary phases segregated and precipitated in SnO2-based varistors [J].

Parra, R ;

Castro, MS ;

Varela, JA .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (04) :401-406

[22]

Pechini M.P, 1967, US Pat. Off., Patent No. [3330697, 3,330,697]

[23]

PIANARO SA, 1995, J MATER SCI LETT, V14, P692, DOI 10.1007/BF00253373

[24] Synthesis of tin oxide (SnO2) by the oxallate route:: Effects of addition method and ageing [J].

Taib, H. ;

Sorrell, C. C. .

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3, 2007, 561-565 :973-976

[25] Porous metal oxides as gas sensors [J].

Tiemann, Michael .

CHEMISTRY-A EUROPEAN JOURNAL, 2007, 13 (30) :8376-8388

[26] Effect of atmosphere and dopants on sintering of SnO2 [J].

Varela, JA ;

Perazolli, LA ;

Longo, E ;

Leite, ER ;

Cerri, JA .

RADIATION EFFECTS AND DEFECTS IN SOLIDS, 1998, 146 (1-4) :131-143

[27] SnO2/α-Fe2O3 hierarchical nanostructure:: Hydrothermal preparation and formation mechanism [J].

Wang, Wei-Wei .

MATERIALS RESEARCH BULLETIN, 2008, 43 (8-9) :2055-2059

[28] Catalytic activity of nanometric pure and rare earth-doped SnO2 samples [J].

Weber, Ingrid T. ;

Valentini, Antoninho ;

Probst, Luiz Fernando D. ;

Longo, Elson ;

Leite, Edson R. .

MATERIALS LETTERS, 2008, 62 (10-11) :1677-1680

[29]

ZHANG GZ, 2005, J PHYS D, V38, P1072

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