Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors

The performance characteristics of the ZnO-Bi2O3-based varistors can be assessed to meet the applications criteria on the basis of a systematic evaluation corresponding to various experimental conditions. This evaluation process employs the lumped parameter/complex plane analysis technique for the a...

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Main Author: Mohammad A. Alim
Format: Article
Language:English
Published: Wiley 1994-01-01
Series:Active and Passive Electronic Components
Online Access:http://dx.doi.org/10.1155/1994/61371
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author Mohammad A. Alim
author_facet Mohammad A. Alim
author_sort Mohammad A. Alim
collection DOAJ
description The performance characteristics of the ZnO-Bi2O3-based varistors can be assessed to meet the applications criteria on the basis of a systematic evaluation corresponding to various experimental conditions. This evaluation process employs the lumped parameter/complex plane analysis technique for the ac small-signal immittance data. An overall behavior of these devices is attributed to the microstructural effects via controlled grain-size and its distribution, existence of phases, carrier density in the grains, trapping states, and their role within the electrical thickness across the grain-boundary electrical barrier, etc. These factors are strongly dictated by the additives to ZnO in conjunction with the processing variables. Multiple device functions can result when a single set from a variety of processing parameters is chosen, provided the starting chemistry or composition/formulation remain invariant. The factors related to materials' history, composition recipe, and combined processing methods influence or modify relative magnitudes of the constituting elements of each trapping relaxation. Thus, these magnitudes either increase or decrease the visibility without distorting the devices' generic dielectric behavior. An identical set of experiments contributes to distinguish a good varistor performance over a poor response for surge arrester (i.e., suppressor/absorber) applications in the power systems' transient protection.
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spelling doaj-art-6f825fd4bf8a428885f0379ce4e997a62025-08-20T02:06:15ZengWileyActive and Passive Electronic Components0882-75161563-50311994-01-01171576510.1155/1994/61371Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based VaristorsMohammad A. Alim0Hubbell Incorporated, The Ohio Brass Company, 8711 Wadsworth Road, Wadsworth, Ohio 44281, USAThe performance characteristics of the ZnO-Bi2O3-based varistors can be assessed to meet the applications criteria on the basis of a systematic evaluation corresponding to various experimental conditions. This evaluation process employs the lumped parameter/complex plane analysis technique for the ac small-signal immittance data. An overall behavior of these devices is attributed to the microstructural effects via controlled grain-size and its distribution, existence of phases, carrier density in the grains, trapping states, and their role within the electrical thickness across the grain-boundary electrical barrier, etc. These factors are strongly dictated by the additives to ZnO in conjunction with the processing variables. Multiple device functions can result when a single set from a variety of processing parameters is chosen, provided the starting chemistry or composition/formulation remain invariant. The factors related to materials' history, composition recipe, and combined processing methods influence or modify relative magnitudes of the constituting elements of each trapping relaxation. Thus, these magnitudes either increase or decrease the visibility without distorting the devices' generic dielectric behavior. An identical set of experiments contributes to distinguish a good varistor performance over a poor response for surge arrester (i.e., suppressor/absorber) applications in the power systems' transient protection.http://dx.doi.org/10.1155/1994/61371
spellingShingle Mohammad A. Alim
Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
Active and Passive Electronic Components
title Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
title_full Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
title_fullStr Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
title_full_unstemmed Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
title_short Influence of Multiple Trapping Phenomena on The Applications Criteria of ZnO-Bi2O3-Based Varistors
title_sort influence of multiple trapping phenomena on the applications criteria of zno bi2o3 based varistors
url http://dx.doi.org/10.1155/1994/61371
work_keys_str_mv AT mohammadaalim influenceofmultipletrappingphenomenaontheapplicationscriteriaofznobi2o3basedvaristors