Effect of high content of Co3O4 on the structure, morphology, and electrical properties of (Cr,Sb)-doped SnO2 varistors

被引：17
|
作者：
Aguilar-Martinez, J. A. [1 ]
Zambrano-Robledo, P. [1 ]
Garcia-Villarreal, S. [2 ]
Hernandez, M. B. [1 ]
Rodriguez, Eden [1 ]
Falcon-Franco, L. [2 ]
机构：
[1] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, CIIIA, Carretera Salinas Victoria Km 2-3, Apodaca 66600, NL, Mexico
[2] Univ Autonoma Coahuila, Fac Met, Carr 57,Km 4-5, Monclova 25710, Coah, Mexico
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 06期
关键词：
X-ray methods; Grain size; Electrical properties; Spinels; Varistors; CO-DOPED SNO2; PHASE-ANALYSIS; MICROSTRUCTURE; TEMPERATURE; BEHAVIOR; CR2O3;
D O I：
10.1016/j.ceramint.2016.01.165
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Co3O4 content on the microstructure, structure, and electrical properties of SnO2-Cr2O3-Sb2O5 ceramic samples was investigated in the present work. The system under study was (99.9-X)% SnO2-X%Co3O4-0.05%Sb2O5-0.05% Cr2O3, where X=0, 0.5, 1, 2, or 4 mol%. For a thorough study of this ceramic system, thermal analysis, X-ray diffraction (XRD) with Rietveld refinement, and scanning electron microscopy (SEM) characterization were carried out. It was found that the spinel phase content increases from 3% for the lowest Co3O4 dopant concentration up to 15% as the dopant content increases to 4%. As for the electrical properties of the studied system, the samples showed high values of breakdown electric field (from 2994.51 to 3218.38 V cm(-1)) and therefore the samples may be suitable for high-voltage applications. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：7576 / 7582
页数：7
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