Results 21 to 30 of about 4,264 (203)

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, José Francisco Fernández, José de Frutos, Paulo Roberto Bueno, Elson Longo, José Arana Varela   +5 more
doaj   +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.
A.B. Glot, A.N. Bondarchuk, Avdeenko, B.J. Jones, Behr, Bondarchuk, Chen, El-Hofy, Glot, Glot, Glot, Glot, Glot, Glot, Glot, Glot, Glot, Goldman, Harwig, Ivanov, Kuo, Kutty, Leite, Mahan, Manno, Matsuoka, N. Verma, Neto, Pike, Pike, Pompe, Punn, R. Bulpett, S.V. Mazurik, Skuratovsky, Stolichnov, Trofimenko, Vanadamme, Verkerk, Wagner, Wen, Yamaura   +41 more
core   +1 more source

Revisiting the effects of Co(2)O(3) on multiscale defect structures and relevant electrical properties in ZnO varistors

High Voltage, 2020
Element doping is an effective method to improve the performance of ZnO varistors. Previous studies mainly focused on the variation of microstructures and Schottky barriers.
Men Guo, Yao Wang, Kangning Wu, Lei Zhang, Lei Zhang, Xia Zhao, Ying Lin, Jianying Li   +7 more
doaj   +1 more source

Leakage Current Measurements of Surge Arresters

Energies, 2023
The paper presents the methods of assessing the technical condition of varistor surge arresters used in laboratory tests and in operation—performed without disconnecting the arresters from the network.
Marek Olesz, Leszek S. Litzbarski, Grzegorz Redlarski   +2 more
doaj   +1 more source

Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing [PDF]

Science of Sintering, 2017
Post-sintering of magnesium titanate ceramics by hot isostatic pressing (HIP) in an oxygen-free atmosphere significantly alters various electrical properties of the product. In particular, the sintered material becomes a semiconductor.
Đorđević Antonije R., Olćan Dragan I., Obradović Nina, Paunović Vesna, Filipović Suzana, Pavlović Vladimir B.   +5 more
doaj   +1 more source

Varistor coupling method and recommendation parameters for combination wave test

IET Science, Measurement & Technology, 2023
Varistor coupling is recommended by International Telecommunication Union in combination wave test waveforms of surge protective devices (SPD), although the varistor coupling method and recommendation parameters for the combination wave test are not well
Mi Zhou, Weihan Zhao, Dongdong Wang, Haoshen Fan, Li Cai, Jianguo Wang, Yadong Fan   +6 more
doaj   +1 more source

A supercapacitor based enhancement technique for stand-alone surge protection circuits [PDF]

, 2013
With the International Technology Roadmap for Semiconductors predicting below-25nm feature-size VLSIs, powered by DC power supplies of less than 1V, protection against transients has become mandatory for modern electronic systems.
Fernando, Jayathu, Kularatna, Nihal
core   +2 more sources

The Degradation of Epoxy Resin-Coated ZnO Varistors at Elevated Temperatures and Ambient Humidity Conditions

Active and Passive Electronic Components, 2003
The degradation of the epoxy resin-coated commercial ZnO varistors at elevated temperatures and ambient humid conditions has been investigated experimentally.
Jianying Li, Shengtao Li, M. A. Alim, G. Chen   +3 more
doaj   +1 more source

Revisão: efeito dos metais doadores nas propriedades elétricas e microestruturais dos varistores cerâmicos à base de SnO2 Review: effect of donor metals on the electrical and microstructural properties of SnO2-based ceramic varistors

Cerâmica, 2008
O estudo da adição de dopantes trivalentes é uma das principais pesquisas na área de varistores. Vários autores têm buscado entender os efeitos destes dopantes nas propriedades elétricas e microestruturais destas cerâmicas eletrônicas.
M. M. Oliveira, J. H. G. Rangel, V. C. de Sousa, E. Longo, R. N. R. Filho   +4 more
doaj   +1 more source

Non-Linear I-V Characteristics of Double Schottky Barriers and Polycrystalline Semiconductors

, 1992
An attempt to determine theoretically the highly non-linear current-voltage (I-V) characteristics of polycrystalline semiconductors, such as ZnO-based varistors, is made from the electrical properties of individual grain boundaries under dc bias.
Bernasconi, Blatter, Blatter, Clerc, E. Canessa, Eda, Eda, Einzinger, Greuter, Kenkel, Kirkpatrick, Levinson, Levinson, Levinson, Mahan, Mahan, Mahan, McLachlan, Niemeyer, Olsson, Olsson, Olsson, Petermann, Pike, Seager, Takayasu, Tao, Tonkoshkur, Tua, V.L. Nguyen, Werner   +30 more
core   +1 more source