Results 61 to 70 of about 2,304 (224)
Modeling of electrical transport in Zinc Oxide varistors [PDF]
Advances in Radio Science, 2014 The electrical transport in zinc oxide (ZnO) varistors is analyzed using microstructural material modeling. The fully three dimensional current distribution is computed by means of a nonlinear equivalent circuit model representing the assembly of current
K. Bavelis, E. Gjonaj, T. Weiland
doaj +1 more source
Spectroscopy of the dielectric parameters of ZnO-based varistors
Surface Engineering and Applied Electrochemistry, 2012 The spectroscopy of the dielectric parameters of ZnO-based varistors is studied. An analysis of the data on the temperature and frequency dependence of the electric conductivity shows that variable-range hopping conductivity between the localized states near the Fermi level can be implemented in the varistors.
Kharirchi, F. +3 more
openaire +2 more sources
Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong +5 more
wiley +1 more source
Optical and Thermal Characterization of Zinc Oxide-Based Ceramic Using Pyroelectric and Photopyroelectric Techniques [PDF]
, 2009 The advantage of wide electrical band-gap of zinc oxide (ZnO) semiconductor has been used in many applications particularly as varistors, which are ceramic devices with highly non-linear current-voltage characteristics. For ZnO-based varistor system, one
Mohd Shapee, Sabrina
core
Fabrication and electrical characteristics of flash-sintered SiO2-doped ZnO-Bi2O3-MnO2 varistors
Journal of Advanced Ceramics, 2020 The dense ZnO-Bi2O3-MnO2-xSiO2 (ZBMS) varistors for x = 0, 1, 2, 3 wt% were fabricated by flash sintering method under the low temperature of 850 °C within 2 min. The sample temperature was estimated by a black body radiation model in the flash sintering
Pai Peng +7 more
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Photopyroelectric spectrum of MNO2 Doped Bi2O3 - TiO2 - ZnO ceramic combination [PDF]
, 2008 Photopyroelectric spectroscopy is used to study the energy band-gap of the ceramic (ZnO 0.25 Bi2O3 +0.25 TiO2 + x MnO2), x = 0 - 1.3 mol%, sintered at isothermal temperature 1190 and 1270°C for 2 hours in air.
Hashim, Mansor +4 more
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Microstructural evaluation of rare-earth-zinc oxide-based varistor ceramics
Materials Research, 2005 Zinc oxide varistors are nonlinear voltage dependent ceramic resistors used to suppress and limit transient voltage surges. The work reported in this paper involves the relationship between microstructural characteristics and the varistor performance of ...
José Geraldo de Melo Furtado +4 more
doaj +1 more source
International Journal of Ceramic Engineering &Science, Volume 7, Issue 2, March 2025.In this paper, a method to improve the performance of varistor with the help of computational model was presented and verified by experiments. Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties.
Xiao Lei +5 more
wiley +1 more source
Growth Techniques for Bulk ZnO and Related Compounds
, 2011 ZnO bulk crystals can be grown by several methods. 1) From the gas phase, usually by chemical vapor transport. Such CVT crystals may have high chemical purity, as the growth is performed without contact to foreign material.
Galazka, Zbigniew +4 more
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Applied SciencesMetal-oxide surge arresters (MOSAs) are critical devices for overvoltage protection in power systems, and the aging characteristics of their zinc oxide (ZnO) varistors under impulse and power-frequency voltages exhibit significant differences.
Yongqiang Fan +7 more
doaj +1 more source