Results 91 to 100 of about 4,266 (203)

Consideration of surge arresters for low voltage mains applications [PDF]

open access: yes, 2012
The work presented in this report details the background to surge arresters and surge protective device components, viz., spark gaps, gas discharge tubes and metal oxide varistors.
Michalopoulos, Aristidis
core  

Study of the Effect of WO3 and Bi2O3 on the Microstructure and Electrical Properties of A TiO2 based Varistor

open access: yesJournal of Mechanical Engineering and Sciences, 2014
Titanium dioxide (TiO2) varistors doped with tungsten oxide (WO3) and bismuth oxide (Bi2O3) were investigated. The microstructure and electrical characterization were studied, where the effects of different concentrations of WO3 and a fixed amount of ...
Z. Kothandapani   +4 more
doaj   +1 more source

Low distortion automatic phase control circuit [PDF]

open access: yes, 1974
A voltage controlled phase shifter is rendered substantially harmonic distortion free over a large dynamic input range by employing two oppositely poled, equally biased varactor diodes as the voltage controlled elements which adjust the phase shift ...
Hauge, G., Pederson, C. W.
core   +1 more source

دراسة التركيب النسيجي لأجسام سيراميكية من أكسيدي الزنك و السيريوم ((Microstructure study of Ce-doped – Ceramics containing Zinc and Cerium oxides))

open access: yesمجلة المختار للعلوم, 2004
للسيراميك استخدامات عديدة علي نطاق واسع  في مجال الكهرباء (الالكترونيات). ويتسع مدى هـذه  الاستخدامات  ليشمل الوقاية من خطر الجهد باستخدام الفارستور (Varistors) إلى مقاومات الفارستور (Varistors) ذات  درجة الحرارة الموجبة إلى العوازل السيراميكية ...
D. E. Ibrahim, Osama Desouky
doaj   +1 more source

Influence of Sintering Temperature and ZrO2 Dopants on the Microstructure and Electrical Properties of Zinc Oxide Varistors

open access: yesIEEE Access, 2019
This paper investigated the effects of sintering temperature on the microstructure and electrical properties of ZrO2-doped zinc oxide (ZnO) varistor ceramics. The results show that, the additive ZrO2 exists as independent second phase between ZnO grains,
Pengkang Xie, Jianping Hu
doaj   +1 more source

The growth of ZnO crystals from the melt

open access: yes, 2008
The peculiar properties of zinc oxide (ZnO) make this material interesting for very different applications like light emitting diodes, lasers, and piezoelectric transducers.
Bates   +30 more
core   +1 more source

Hardening communication ports for survival in electrical overstress environments [PDF]

open access: yes
Greater attention is being focused on the protection of data I/O ports since both experience and lab tests have shown that components at these locations are extremely vulnerable to electrical overstress (EOS) in the form of transient voltages.
Clark, O. Melville
core   +1 more source

Effect of sintering temperature and heat treatment on electrical properties of indium oxide based ceramics [PDF]

open access: yes, 2008
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   +5 more
core  

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