The effect of aluminium additive on the electrical properties of zno varistors.

• Autorzy: Gubański A. , Mielcarek W. , Prociow K. , Warycha J.
• Konferencja: APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
• Języki publikacji: EN

Abstrakty

EN

Reliable and undisturbed operation of electric and electronic circuits is mainly achieved through the use of appropriate overload protection elements such as overvoltage surge arrestors. The stability of the metal oxide varistors which are used insures that the circuits are adequately protected. The point of adding the varistor material with aluminium is the extension of the I_V characteristic's nonlinearity in high-current region [1]. In this work, both the viability of aluminum doping for ZnO varistors, and the effect of this doping on the ageing processes in varistors were investigated. The current trend is towards the production of better and more robust surge arrestors which utilize mainly ZnO varistors, and it was this trend which motivated these studies. The fundamental technological impediments include the repeatability of manufactured varistors and their susceptibility to ageing factors, such as current shocks, elevated operation temperature and the extended effect of the operation potential. Improving the varistors' imperviousness to ageing continues to be an imperative but, as yet, unsolved problem.

Słowa kluczowe

EN

ZnO varistors; Al additive; ageing; I-V characteristics; TSDC; nonlineary exponent

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 131--136
• Opis fizyczny: Bibliogr. 11 poz

Twórcy

autor

Gubański A.

autor

Mielcarek W.

autor

Prociow K.

autor

Warycha J.

• Institute of Electrical Engineering Fundamentals, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

Bibliografia

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