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Electrical and micro structural properties of (Zn, Nb, Fe)-doped SnO2 varistor systems
(Elsevier B.V., 2005-01-01)
The electrical and microstructural properties of SnO2-based varistors with the addition of 0.025 and 0.050 mol% of Fe2O3 have been characterised. Electric field (E) versus current density (J) curves showed that the effect ...
The role of oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
(Springer, 2005-03-01)
Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron ...
Influence of Ta2O5 on the electrical properties of ZnO- and CoO-doped SnO2 varistors
(Elsevier B.V., 2004-01-01)
SnO2-based varistors doped with 0.5% cobalt, 0.5% zinc and various tantalum amounts were prepared by the solid-state route. Experimental evidence shows that small quantities of Ta2O5 improve the nonlinear properties of the ...
Analysis of secondary phases segregated and precipitated in SnO2-based varistors
(Elsevier B.V., 2005-04-01)
Transmission and scanning electron microscopy techniques were used to study the heterogeneities found in the microstructure of (SnO2Co3O4Nb2O5Fe2O3)-Co-.-Nb-.-Fe-. and (SnO2ZnONb2O5FC2O3)-Zn-.-Nb-.-F-. varistors. Second ...
Nonlinear characteristics of Cr2O3, WO3, ZnO and CoO doped SnO2 varistors
(Elsevier B.V., 2006-01-01)
SnO2 based ceramics doped with 1.0 mol% ZnO, 1.0 mol% CoO, 0.1 mol% WO3 and 0.05 mol% Cr2O3 show varistor behavior with nonlinear coefficient alpha = 33, breakdown electric field E-B = 12.5 kV/cm, leakage current I = 0.63 ...
The influence of the synthesis route on the final properties of SnO2-based varistors
(Elsevier B.V., 2008-04-01)
A comparative study of two customary routes of ceramics processing applied to the synthesis of SnO2-based varistors is reported in this paper. Devices of equivalent composition were prepared through the Pechini method and ...
Structural and electrical properties of ZnO varistors containing different spinel phases
(Elsevier B.V., 2001-01-01)
Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately ...
Structural and electrical properties of ZnO varistors containing different spinel phases
(Elsevier B.V., 2001-01-01)
Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately ...
Electrophoretic deposition of (Zn, Nb)SnO2-films varistor superficially modified with Cr3+
(Elsevier B.V., 2015-07-01)
Recently, there has been an important rise in the research and development aimed to improve the properties of SnO2-based varistors. Meanwhile, due to fact that ZnO-based varistors possess better electrical properties ...
High-performance and low-voltage SnO2-based varistors
(2017-11-01)
This paper presents the results of a thorough study conducted on the action mechanism of one-dimensional single-crystalline SnO2 nanobelts in decreasing the breakdown electric field (Eb) in SnO2-based varistors. The proposed ...