Title of article
The influence of yttrium on a typical SnO2 varistor system: Microstructural and electrical features
Author/Authors
R. Parra، نويسنده , , Y. Maniette، نويسنده , , J.A. Varela، نويسنده , , M.S. Castro، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2005
Pages
6
From page
347
To page
352
Abstract
The influence of yttrium oxide, Y2O3, on the microstructure development of the SnO2·Co3O4·Nb2O5 typical varistor system was studied with scanning (SEM) and transmission (TEM) electron microscopies. The different phases present in the studied samples were characterized through XRD, EDS and selected area diffraction patterns (SAD). Particles of Co2SnO4 were observed with TEM in every sample, whereas clusters of the pyrochlore phaseY2Sn2O7 were observed with SEM in samples with 0.05, 0.10 and 0.25 mol% of Y2O3. The higher non-linearity (α = 16) was achieved with the addition of 0.05 mol% of Y2O3. The influence of the secondary phases on the electrical properties is also addressed in this work.
Keywords
SnO2 , Varistors , Electrical properties , electron microscopy
Journal title
Materials Chemistry and Physics
Serial Year
2005
Journal title
Materials Chemistry and Physics
Record number
1063919
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