A new composition of ceramic varistor: SnO2 doped with (Co, Nb, Al)
نویسندگان
چکیده
منابع مشابه
Crystal phase analysis of SnO2-based varistor ceramic using the Rietveld method
A second addition of lmol% of CoO to a pre calcined SnO2-based ceramic doped with 1.0mol% of CoO, 0.05mol% of Nb2O5 and 0.05mol% of Cr2O3 promotes the appearance of a secondary phase, Co2SnO4, besides the SnO2 cassiterite phase, when the ceramic was sintered at 1350°C/2h. This was observed using X-ray powder diffraction, scanning electron microscopy and energy dispersive X-ray techniques. Rietv...
متن کاملOptical and electrical properties of ZnO doped thin films doped with Al, V and Nb
This study addresses the optical and electrical properties of ZnO thin films doped with Al, V and Nb (ZnO:Al, ZnO:V and ZnO:Nb, respectively) deposited by r.f. magnetron sputtering in Ar atmosphere. The films are deposited on glass substrates without heating and heated at 100C, 150C and 275C. The optical spectra of transmittance and reflectance are measured and the optical band gap of the films...
متن کاملImproved Thermoelectric Performances of SrTiO3 Ceramic Doped with Nb by Surface Modification of Nanosized Titania.
Nb-doped SrTiO3 ceramics doped with the surface modification of nanosized titania was prepared via liquid phase deposition approach and subsequent sintered in an Ar atmosphere. The surface modification of nanosized titania significantly improved the ratio of the electrical conductivity to thermal conductivity of SrTiO3 ceramic doped with Nb, and has little impact on the Seebeck coefficient, thu...
متن کاملGrowth and Optical Properties Investigation of Pure and Al-doped SnO2 Nanostructures by Sol-Gel Method
SnO2 nanoparticles with different percentage of Al (5%, 15%, and25%) were synthesized by sol-gel method. The structure and nature of nanoparticles are determined by of X-ray diffraction analysis. Also, morphology of the samples is evaluated by SEM. Moreover, the optical properties of the samples are investigated with UV-Visible and FT-IR. The XRD patterns are in...
متن کاملA Low Temperature Hydrothermal Synthesis of ZnO Doped SnO2 Nanoparticles with High Photocatalytic Activity
The paper reports the preparation and photocatalytic activity of ZnO doped SnO2 nanoparticles. These nanoparticles were synthesized by hydrothermal method. The products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Their grain sizes are about 50-100 nm. The characterization results revealed that the synthesized nanoparticles possess just cr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of Materials Science
سال: 1996
ISSN: 0250-4707,0973-7669
DOI: 10.1007/bf02745162