Effect of high content of Co3O4 on the structure, morphology, and electrical properties of (Cr, Sb)-doped SnO2 varistors. Issue 6 (1st May 2016)

• Record Type: Journal Article
• Authors: Aguilar-Martínez, J.A.; Zambrano-Robledo, P.; García-Villarreal, S.; Hernández, M.B.; Rodríguez, Edén; Falcon-Franco, L.
• Is Part Of: Ceramics international. Volume 42:Issue 6(2016)
• Page Start: 7576
• Page End: 7582
• Publication Date: 2016-05-01
• Subjects: A. X-ray methods -- B. Grain size -- C. Electrical properties -- D. Spinels -- E. Varistors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.01.165
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The effect of Co3 O4 content on the microstructure, structure, and electrical properties of SnO2 –Cr2 O3 –Sb2 O5 ceramic samples was investigated in the present work. The system under study was (99.9– X )% SnO2 – X %Co3 O4 –0.05%Sb2 O5 –0.05% Cr2 O3, 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 Co3 O4 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.