Results 41 to 50 of about 122,559 (221)

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

Microstructural Characterization of ZnO Varistors.

Journal of the Japan Society of Powder and Powder Metallurgy, 1995
Two kinds of commercial ZnO system varistors were investigated with relevance to their microstructures. Particularly, face-to-face fracture surfaces were characterized in terms of secondary electron image and backscatterd electron image to clarify the existence of precipitates at the grain-to-grain interface.
Takeda, Shunji, Koumoto, Kunihito, Yanagida, Hiroaki   +2 more
openaire   +2 more sources

Microstructure and electrical properties of Y(NO3)3·6H2O-doped ZnO-Bi2O3-based varistor ceramics

, 2011
Y(NO3)3·6H2O-doped ZnO-Bi2O3-based varistor ceramics were prepared using a solid reaction route. The microstructure, electrical properties, degradation coefficient(DV), and dielectric characteristics of varistor ceramics were studied in this paper.
Xu, D.(frank@ujs.edu.cn), Dong Xu, Juan Yang, Yuan, Hongming, Yang, Juan, Hongming Yuan, Lin, Yuanhua, Yuanhua Lin, Xu, Dong, Cheng, Xiaonong, Xiaonong Cheng   +10 more
core   +1 more source

Current limiting and negative differential resistance in indium oxide based ceramics [PDF]

, 2009
Indium oxide based ceramics with bismuth oxide addition were sintered in air in the temperature range 800-1300 ºC. Current-voltage characteristics of In2O3-Bi2O3 ceramics sintered at different temperatures are weakly nonlinear.
Bondarchuk, AN, Jones, Benjamin, A.B. Glot, A.N. Bondarchuk, Jones, BJ, Bondarchuk, A N, Glot, AB, R. Bulpett, Verma, N, Bulpett, R, Mazurik, SV, Mazurik, S V, B.J. Jones, Jones, B J, N. Verma, Mazurik, S.V., S.V. Mazurik, Glot, A B, Glot, A.B., Bondarchuk, A.N.   +19 more
core   +1 more source

Desenvolvimento de varistores à base de SnO2 para aplicação em redes de alta tensão Development of SnO2-based varistors for high voltage application

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, J. H. G. Rangel, V. C. de Sousa, E. R. Leite, E. Longo, P. R. Bueno, J. A. Varela   +6 more
doaj   +1 more source

KARAKTERISASI VARISTOR ZnO-Bi203-CuO

, 2005
KARAKTERISASI VARISTOR ZnO-Bi203-CuO. Untuk mengetahui peran CuO dalam pembentukan varistor, pembuatan dan karakterisasi varistor ZnO-Bi2O3-CuO telah dilakukan.
Ariwahjoedi, Bambang, Yamin, M, Hidayat, Saeful, Syarif, Dani Gustaman   +3 more
core   +1 more source

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, Luiz Antônio Saléh, Eduardo Torres Serra, Glória Suzana Gomes de Oliveira, Maria Cecília de Souza Nóbrega   +4 more
doaj   +1 more source

Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary

Journal of Advanced Ceramics, 2023
Highly stable ZnO varistor ceramics with steadily decreasing power loss have been put into applications in electrical and electronic systems for overvoltage protections, even with the absence of general understandings on their aging behaviors.
Zhuolin Cheng, Rou Li, Yiwei Long, Jianying Li, Shengtao Li, Kangning Wu   +5 more
doaj   +1 more source

Computer Simulation of ZnO Varistors Failures [PDF]

MRS Proceedings, 1997
ABSTRACTA simple thermo-mechanical model is applied to evaluate the influence of the nonuni-formity of ZnO varistor disks used in surge arresters on their energy handling capability. By solving heat transfer equations for a varistor disk with nonuniform electrical properties, we compute the time dependence of the temperature profile and the ...
Bartkowiak, M., Mahan, G. D., Comber, M. G., Alim, M. A.   +3 more
openaire   +1 more source

The Electrical Conductivity of the Lower Mantle From High‐Pressure/High‐Temperature Measurements of Pyrolite and Ten Years of Geomagnetic Observations

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Electromagnetic sounding coupled with experimental measurements of electrical conductivity (EC) can provide valuable constraints on the thermochemical state of Earth's lower mantle. Here, we report a new set of experimentally determined EC values of pyrolite, a candidate composition of the lower mantle, between 25 and 80 GPa at room ...
Charlotte Trubowitz, Motohiko Murakami, Federico Munch, Alexander Grayver, Christian Liebske, Amir Khan, Nobuyoshi Miyajima, Pinku Saha, Yoshiyuki Okuda, Georg Spiekermann, Luiz Grafulha Morales   +10 more
wiley   +1 more source