A comparative study on degradation characteristics of ZnO nanoparticles-Bi2O3-Mn2O3varistors at various ambient sintering processes

Sendi, Rabab

doi:10.1016/j.cjph.2017.11.007

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…Many researchers have been studying the impacts of microstructure, metal oxide additives and processing methods on the degradation of ZnO varistors. 19 Nahm et al reported the degradation behavior by DC-accelerated stress and pulsecurrent stress of varistors with different sintering temperatures. They have found that the sample sintered at 1300 ○ C exhibited the highest stability for E-J characteristics after application of the DC-accelerated stress state and they confirmed that the sintering temperature has a strong effect on degradation behavior by the stress.…”

Section: X-ray Powder Diffractionmentioning

confidence: 99%

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Bouchekhlal

Hobar

2018

J. Adv. Dielect.

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The nonlinear properties of ZBMCCS-based varistors, which are composed of ZnO–Bi2O3–MnO2–Cr2O3–Sb2O3–Co3O4 and SiO2 are studied inrelation to sintering temperature, in the range of 1280–1350[Formula: see text]C. The samples are investigated for grain morphology by using scanning electron microscope (SEM). These samples were examined by using X-ray diffraction patterns (XRD) and DC electrical measurements. X-ray diffraction analysis of the samples show the presence of ZnO, Zn2SiO4 willemite phase and Co[Formula: see text]Sb[Formula: see text]O4 spinel phases.The average grain size of ZnO increased as the sintering temperature increased from 2.57 to 6.84 [Formula: see text]m. In the examined temperature range, the breakdown field decreased from 2992 to 127[Formula: see text]V/cm with the increase of sintering temperature. This system gives a relatively high nonlinearity coefficient [Formula: see text] (at a sintering temperature of 1280[Formula: see text]C) with a low leakage current of 0.21[Formula: see text]mA/cm2.

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Section: X-ray Powder Diffractionmentioning

confidence: 99%

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Bouchekhlal

Hobar

2018

J. Adv. Dielect.

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“…The grain size distribution was carried out by measuring the grain size of at least 150 randomly selected grains [23] using the ImageJ software [24]. The formula d = 1.56 L was applied to each measurement, where d is the grain size and L is the length of the line that touches two faces of the grain (passing through the center of the grain) [25][26][27].…”

Section: Methodsmentioning

confidence: 99%

Synthesis by Hydrothermal Treatment of ZnO-Based Varistors Doped with Rare Earth Oxides and Their Characterization by Impedance Spectroscopy

et al. 2020

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ZnO-based ceramic varistors have shown excellent electrical and dielectric properties due to their characteristics microstructures represented by the arrangement of their grains and grain boundaries that allow the absorption and flow of energy when subjected to an electrical surge. Their properties and characteristics depend on their chemical compositions and processing routes. Typical processing routes involve several stages of grinding and precalcination—which are time consuming processes. Because of this, this study proposes a simpler and cheaper alternative route for processing ceramic varistors. The alternative process proposed is the mixing of the precursor oxides by means of a hydrothermal treatment. The characteristics and properties of the synthesized ceramic varistors were evaluated by means of scanning electron microscopy, X-ray diffraction and impedance spectroscopy, considering the effect of the addition of rare earth oxides (La2O3, CeO2 and Nd2O3). The results showed that the mixing of the oxides through hydrothermal treatment produces ceramic varistors with characteristics and properties similar to those obtained by other processing routes. Furthermore, it was observed that the addition of rare earth oxides affects the characteristics and properties of the ceramic varistor depending on the type of rare earth oxide added, its concentration and ionic radius.

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“…ZnO varistors are semiconductor ceramic materials. The electrical behaviours of multicomponent oxide ceramics depend on both the microstructure of the material and the products formed on the grain boundaries of ZnO [1]. ZnO varistors are ceramic devices with highly non-linear current-voltage characteristics similar to back-to-back Zener diodes.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Fracture Voltage of TiO₂-Doped ZnO-Bi₂O₃-MnO-CoO Ceramics Produced by the Chemical Precipitation Method with Using Artificial Neural Networks

2019

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In this study, TiO2 (2.5 and 5.0 wt%) doped ZnO-Bi2O3-MnO-CoO were produced by chemical precipitation method. In the ceramics produced, the effect of TiO2 addition, sintering temperature, and time on breakdown voltage was experimentally measured and a mathematical model was developed according to these results. Based on the developed mathematical model and experimental results, an artificial neural network model was developed to determine the effect of TiO2 on the breakdown voltage depending on the sintering temperature and time and was estimated by the breakdown voltage values. The results of the mathematical model and the artificial neural networks were statistically compared with the t test.

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A comparative study on degradation characteristics of ZnO nanoparticles-Bi2O3-Mn2O3varistors at various ambient sintering processes

Cited by 4 publications

References 25 publications

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Synthesis by Hydrothermal Treatment of ZnO-Based Varistors Doped with Rare Earth Oxides and Their Characterization by Impedance Spectroscopy

Prediction of the Fracture Voltage of TiO₂-Doped ZnO-Bi₂O₃-MnO-CoO Ceramics Produced by the Chemical Precipitation Method with Using Artificial Neural Networks

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A comparative study on degradation characteristics of ZnO nanoparticles-Bi2O3-Mn2O3varistors at various ambient sintering processes

Cited by 4 publications

References 25 publications

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Effect of sintering temperature on microstructure and nonlinear electrical characteristics of ZnO varistor

Synthesis by Hydrothermal Treatment of ZnO-Based Varistors Doped with Rare Earth Oxides and Their Characterization by Impedance Spectroscopy

Prediction of the Fracture Voltage of TiO2-Doped ZnO-Bi2O3-MnO-CoO Ceramics Produced by the Chemical Precipitation Method with Using Artificial Neural Networks

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Prediction of the Fracture Voltage of TiO₂-Doped ZnO-Bi₂O₃-MnO-CoO Ceramics Produced by the Chemical Precipitation Method with Using Artificial Neural Networks