Results 31 to 40 of about 2,070 (218)

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

Synthesis and current-voltage characterization of tin dioxide varistors [PDF]

, 1999
An overview of the steady state electrical properties of tin dioxide varistors is presented. The varistors are manufactured in two ways: (1) a ceramic route by mixing and compaction of tin dioxide powder with various dopants and (2) a sol-gel method ...
A. S. Kale, S. K. Date, R. N. Barve, Santhosh, P. N., Date, S. K., P. N. Santhosh, Kale, A. S., S. Seal, Barve, R. N., Seal, S.   +9 more
core   +1 more source

Hydrogen-induced degradation in SrTiO3-based ceramic varistors

, 2004
For ZnO-based ceramic varistors, it was found that the current leakage is largely increased by the reduction of hydrogen generated in nickel electroplating and electroless nickel plating.
Chan, H.L.W., Li, B.R., Chen, W.P.
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

Influence of Partial Discharges on ZnO Varistors [PDF]

, 2008
The varistors used in HV overvoltage limiters are constantly exposed to operating voltage and environmental hazards and also to transient hazards associated with, among others, overvoltages or pollution.
Jaroszewski, M
core   +1 more source

Caracterização elétrica de blocos varistores à base de SnO2 Electrical characteristics of SnO2-based varistor blocks

Cerâmica, 2012
Neste trabalho foi realizado um estudo das propriedades elétricas de blocos varistores à base de SnO2. Foram avaliadas a não linearidade destas cerâmicas por meio da caracterização tensão-corrente, bem como a altura, largura e os portadores de cargas por
R. L. Brito, P. A. P. Pessôa, J. S. Vasconcelos, L. P. S. dos Santos, J. H. G. Rangel, E. Longo, V. C. de Sousa, M. A. Ramirez, M. M. Oliveira   +8 more
doaj   +1 more source

Analysis of MOA Damage Mechanism Under Multiple Strokes

Applied Sciences
Accident records from the actual operation of metal oxide arresters (MOAs) indicate that even MOA products that have passed standard tests still suffer from frequent damage.
Tao Yuan, Dengke Gao, Siyu Chen, Zhenjie Zheng   +3 more
doaj   +1 more source

Influência de dopantes doadores na degradação do varistor à base de SnO2 e o efeito do oxigênio pós-degradação nfluence of donor dopants on the degradation of SnO2 -based varistors and the effect of the oxygen post-degradation

Cerâmica, 2006
A degradação elétrica de varistores à base de SnO2 foi estudada e verificou-se que na temperatura de 220 ºC ocorreu a degradação do material. Suas características foram recuperadas quando tratadas em atmosfera de O2, o que mostra que esta atmosfera é ...
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