Effect of Ca, Sr and Ba on the structure, morphology and electrical properties of (Co,Sb)-doped SnO2 varistors

被引：21

作者：

Aguilar-Martinez, J. A. ^{[1
]}

Rodriguez, Eden ^{[2
]}

Garcia-Villarreal, S. ^{[3
]}

Falcon-Franco, L. ^{[3
]}

Hernandez, M. B. ^{[2
]}

机构：

[1] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, Ctr Invest & Innovac Ingn Aeronaut, Apodaca 66600, NL, Mexico

[2] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, NL, Mexico

[3] Univ Autonoma Coahuila, Fac Met, Monclova 25710, Coah, Mexico

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 153卷

关键词：

Electrical properties; Powder diffraction; Ceramics; Rietveld analysis; Electronic materials; I-V CHARACTERISTICS; NONOHMIC PROPERTIES; GRAIN-GROWTH; MICROSTRUCTURE; ZNO; CERAMICS; CR2O3; ZINC; (CO; BEHAVIOR;

D O I：

10.1016/j.matchemphys.2015.01.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, the effect of calcium (Ca), barium (Ba) and strontium (Sr) additions on the microstructure and electrical properties of SnO2-Co3O4-Sb2O5 ceramic varistors was investigated. It was found that the calcium addition promotes densification and grain growth. Ceramics with calcium addition exhibit the lowest electric field at a fixed current density (10(-3) A cm(-2)). The addition of strontium shows a similar effect on microstructure and current-voltage characteristics. However, barium addition causes porosity increase, grain size reduction, changes in the grain morphology (from approximately equiaxed to elongated grains) and the electric field at a fixed current density showed almost no change. Consequently, Ba-containing SnO2-based ceramics cannot be considered as attractive candidates for lowvoltage varistors. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：180 / 186

页数：7

共 40 条

[1] Microstructure and electrical properties in SnO2 ceramics with sequential addition of Co, Sb and Ca [J].

Aguilar-Martinez, J. A. ;

Hernandez, M. B. ;

Glot, A. B. ;

Pech-Canul, M. I. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (22) :7097-7102

[2] Effect of Co3O4 content and compaction pressure on the microstructure and electric properties of SnO2-Sb2O5-Cr2O3 varistor ceramics [J].

Aguilar-Martinez, J. A. ;

Pech-Canul, M. I. ;

Leyva-Porras, Cesar ;

Rodriguez, Eden ;

Ivan Hernandez, V. .

CERAMICS INTERNATIONAL, 2013, 39 (07) :8237-8243

[3] Effect of sintering temperature on the electric properties and microstructure of SnO2-Co3O4-Sb2O5-Cr2O3 varistor ceramic [J].

Aguilar-Martinez, J. A. ;

Pech Canul, M. I. ;

Hernandez, M. B. ;

Glot, A. B. ;

Rodriguez, Eden ;

Garcia Ortiz, L. .

CERAMICS INTERNATIONAL, 2013, 39 (04) :4407-4412

[4]

Aguilar-Martínez JA, 2013, REV MEX FIS, V59, P6

[5] Synthesis, structure parameter and reaction pathway for spinel-type Co2SnO4 [J].

Aguilar-Martinez, J. A. ;

Pech-Canul, M. I. ;

Esneider, M. ;

Toxqui, A. ;

Shaji, S. .

MATERIALS LETTERS, 2012, 78 :28-31

[6] Current-voltage characteristics of SnO2-Co3O4-Cr2O3-Sb2O5 ceramics [J].

Aguilar-Martinez, J. A. ;

Glot, A. B. ;

Gaponov, A. V. ;

Hernandez, M. B. ;

Guerrero-Paz, J. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2009, 42 (20)

[7] A study of the thermal decomposition of BaCO3 [J].

Arvanitidis, I ;

Sichen, D ;

Seetharaman, S .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 1996, 27 (03) :409-416

[8] Synthesis of nanosized (Co, Nb, Sm)-doped SnO2 powders using co-precipitation method [J].

Bastami, H. ;

Taheri-Nassaj, E. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 495 (01) :121-125

[9] QUANTITATIVE PHASE-ANALYSIS USING THE RIETVELD METHOD [J].

BISH, DL ;

HOWARD, SA .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1988, 21 (02) :86-91

[10] Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics [J].

Brankovic, G ;

Brankovic, Z ;

Davolos, MR ;

Cilense, M ;

Varela, JA .

MATERIALS CHARACTERIZATION, 2004, 52 (4-5) :243-251

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