Now showing items 11-20 of 215
Dependence of the nonlinear electrical behavior of SnO2-based varistors on Cr2O3 addition
(Elsevier B.V., 2007-01-01)
Tin dioxide varistors doped with Coo, ZnO, Ta2O5 and Cr2O3 were prepared by the mixed oxide method. Temperature dependent impedance spectroscopy revealed two different activation energies, one at low frequencies and the ...
WO3 and ZnO-doped SnO2 ceramics as insulating material
(Elsevier B.V., 2006-01-01)
SnO2 ceramics doped with ZnO and WO3 were prepared by mixed oxide method. The effect of ZnO and WO3 additives could be explained by the substitution of Sn4+ by Zn2+ and W6+. The addition of WO3 inhibits the grain growth ...
Ultraviolet excitation of photoconductivity in thin films of sol-gel SnO2
(Elsevier B.V., 2005-01-01)
Tin dioxide (SnO2) thin film photoconductivity spectra were measured for a large temperature range using a deuterium source, the intensity of photocurrent spectra in the range 200-400 nm is temperature dependent, and the ...
Growth kinetics of tin oxide nanocrystals in colloidal suspensions under hydrothermal conditions
(Elsevier B.V., 2006-09-29)
Colloidal suspensions of tin oxide nanocrystals were synthesized at room temperature by the hydrolysis reaction of tin chloride (II), in an ethanolic solution. The coarsening kinetics of such nanocrystals was studied by ...
Effect of powder milling and dopant addition on the current-voltage characteristics of SnO2-based ceramics
Non-linear electrical properties of SnO2-based ceramics were investigated as a function of powder agglomeration condition and as a function of dopant addition. All doped powders presented a single phase, cassiterite, as ...
On the photo-induced electrical conduction related to gas sensing of the Sb:SnO2/TiO2 heterostructure
In this work, changes on the electrical properties as function of the temperature and gas addition on the surface of the 4at%Sb:SnO2/TiO2 heterostructure are investigated. This heterojunction privileges the gas sensor ...
Electronic ceramics based on polycrystalline SnO2, TiO2 and (Sn xTi1-x)O2 solid solution
(ABM, ABC, ABPol, 2014)