Results 91 to 100 of about 2,144 (172)

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

مجلة 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

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

Journal 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, S. Begum, I. Ahmad, I. R. Daud, S. Gholizadeh   +4 more
doaj   +1 more source

Application of infrared thermography to non-contact testing of varistors [PDF]

, 2013
Testing of varistors using thermography was carried out in order to assess their protective properties against possible overvoltage phenomena in the form of high-level voltage surges.
Galla, S., Konczakowska, A.
core  

An Experimental Study of the Failure Mode of ZnO Varistors Under Multiple Lightning Strokes

, 2019
In this study, in order to explore the failure mode of ZnO varistors under multiple lightning strokes, a five-pulse 8/20 μs nominal lightning current with pulse intervals of 50 ms was applied to ZnO varistors.
Chunlong Zhang, Dongbo Lv, Chunying Li, Pengfei Li, Hongyan Xing, Shaojie Yang   +5 more
core   +1 more source

INVESTIGATION OF EXPLOSION SAFETY OF DC POLYMER SURGE ARRESTERS 3.3 KV FOR TRACTION NETWORK OF RAILWAY TRANSPORT

Electrical engineering & Electromechanics, 2019
In the testing laboratories of Ukraine, there is no high-voltage equipment of the necessary energy for testing surge arresters for explosion safety, which does not allow to estimate this indicator at the stage of development of prototypes.
Yu. N. Shumilov, V. I. Bondarenko
doaj   +1 more source

The Effects of Bi₂O₃ Doping on the Electrical Characteristics of SnO₂ Based Varistors

, 2011
Bi2O3 is an important additive in the composition of ZnO varistors. However, the effect of Bi2O3 on novel SnO2 based varistors is still unclear. This paper reports the nonlinear electrical characteristics of (98.95-x)mol%SnO2-0.5mol%CoO-0.05mol%Nb2O5 ...
Zhen Guo Zhang, Xiao Peng Li, Tian Li, Ji Wei Fan, Xiang Yang Liu   +4 more
core   +1 more source

The Effects Of Zinc Oxide Microstructure On The Electrical Characteristics Of Low-Voltage Ceramic Varistors. [TK7871.99.V3S525frb] [Microfiche 7646] [PDF]

, 2004
The effects of ZnO microstructure, on the electrical characteristics of low-voltage ceramic varistors, have been investigated in this ...
Ahmad, Shahrom
core   +1 more source

Effects of Dopants and Processing Parameters on the Properties of ZnO-V₂O₅-Based Varistors Prepared by Powder Metallurgy: A Review. [PDF]

Materials (Basel), 2023
Lungu MV.
europepmc   +1 more source

Estudio de la región rica en Bi₂O₃ en el sistema binario ZnO-Bi₂O₃

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
Ceramic materials based in the ZnO- Bi2O3 system have their principal application as varistors. The binary system ZnO-Bi2O3 is specially relevant to the formation of the microstructure responsable of the varistor behaviour.
Caballero, A. C., Fernández, J. F., Peiteado, M., de la Rubia, M. A.   +3 more
doaj  

Effect of MnO2${ ext{MnO}}_{2}$ doping on AC aging characteristics of varistor in arrester

International Journal of Ceramic Engineering & Science
As the core component of lightning arrester, the performance of ZnO varistor directly affects the protection level of lightning arrester. Under the action of long‐term AC voltage, the varistors are prone to AC aging, which leads to the deterioration of ...
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Yiping Jiang, Pengfei Meng, Jingke Guo, Yue Yin   +8 more
doaj   +1 more source