Results 91 to 100 of about 156,786 (215)
, 2010 This work presents the most relevant aspects of the SnO2 based varistors technology and a comparative study of its non linear behavior in relation to ZnO (modified Matsuoka system) varistors.
Longo, E. [UNESP] +5 more
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Quality assesment of zno varistors in APATOR S.A. company [PDF]
, 2012 W artykule omówiono etapy produkcji warystorów tlenkowo - cynkowych oraz procedury kontroli jakości ograniczników przepięć niskiego napięcia w zakładach APATOR S.A. w Toruniu.
Olesz, M.
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Effect of the addition of ZnO seeds on the electrical proprieties of ZnO-based varistors [PDF]
, 2020 ZnO has the characteristic of presenting an intermediate value for the effective 3 eV barrier at room temperature. ZnO ceramics are applied in high-voltage systems or circuits.
J A Varela +7 more
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International Journal of Ceramic Engineering & ScienceZnO varistors doped with Y2O3, Bi2O3, and Co2O3 were analyzed for electrical performance, microstructure, phase composition, and elemental distribution using electrical performance testing, scanning electron microscopy, X‐ray diffraction, and energy ...
Zhengzheng Fu +7 more
doaj +1 more source
PROCESSING AND CHARACTERIZATION OF LOW-VOLTAGE VARISTORS
, 1994 ZnO seed particles and Cr2O3 were used in this study to control the microstructure of ZnO varistors. The seed particles were prepared by adding 1.0 mol % BaO to ZnO. The powder was then calcined at 800-degrees-C for 2 h, pressed into pellets and sintered
Longo, Elson +3 more
core +2 more sources
Study on Microstructure and Electrical Properties of ZnO Varistor Ceramics
, 2011 To obtain ZnO varistors with high voltage gradient, ZnO varistors were fabricated by traditional ceramic sintering technique, which were sintered from 1135 to 1155 °C, the microstructure and properties of varistors were characterized by SEM, X-rays ...
Chang Qi Xia, Mo He, Qi Bin Liu
core +1 more source
Microstructural and nonohmic properties of ZnO.Pr6O11 CoO polycrystalline system
Materials Research, 2010 The microstructure and electrical properties of varistors composed of (95-x) ZnO + x Pr6O11 + 5 CoO (ZPC), (x = 0.1, 0.5 and 1.0) and sintered at 1300 and 1350 °C, were investigated. According to X-ray diffraction, several phases (ZnO, Pr2O3 and Pr2CoO4)
Miguel Angel Ramírez +5 more
doaj +1 more source
The Simulation of Failure Modes on ZnO Varistors
IEEJ Transactions on Power and Energy, 2008 There are three main failure modes of ZnO varistors; thermal runaway, puncture and cracking. It is important from the operational point of view for user of ZnO surge arresters to know the fundamental mechanisms of these failure modes. I led many equations on these failures and simulated failure modes.
openaire +1 more source
Discover ElectronicsZnO-based varistors are widely used in electrical equipment for surge protection. This research explores the influence of sintering parameters—such as sintering temperature, ramp rate and soaking time—on microstructure development and V-I characteristics
Muhammad Hassan +3 more
doaj +1 more source
Cerâmica, 2006 Varistores à base de SnO2 foram preparados pelo processo convencional de mistura de óxidos. As amostras foram sinterizadas a 1250 °C por 2 h. Os difratogramas obtidos por difração de raios X e as análises por microscopia eletrônica de varredura ...
M. M. Oliveira +6 more
doaj +1 more source