Temperature dependence of zinc oxide grain resistivity in ZnO varistor ceramics

Ivon, A.I.; Glot, A.B.; Lavrov, R.I.; Bubel, T.A.

doi:10.1016/j.jallcom.2015.10.046

Cited by 14 publications

(8 citation statements)

References 25 publications

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“…On the other hand, ZnO in powder form and with nanometric dimensions presents a great potential for its application in solar cells [4], photocatalysts [5], varistors [6], and gas sensors [7], among others. There are multiple synthesis techniques for producing ZnO nanoparticles, which determine the dimensions and morphologies of the particles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Nanopowders by the Homogeneous Precipitation Method: Use of Taguchi’s Method for Analyzing the Effect of Different Variables

Herrera-Rivera

Olvera

Maldonado

2017

Journal of Nanomaterials

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In the present work the effect of different factors in the synthesis of ZnO powders by the homogeneous precipitation method is analyzed. A robust statistical technique, Taguchi's method, was used to reduce the experiments number. The variables studied were precursor, solvent and precipitating agent type, Zn molar concentration, percentage of saturation, speed and time of agitation, and temperature of synthesis. In order to optimize the particle size, an experimental design of 18 trials was proposed, according to L 18 Taguchi array. Structural and morphological properties were characterized by X-ray diffraction (XRD) and scanning and transmission electron microscopy techniques (SEM and TEM). The estimated crystallite size in synthesized samples ranged from 32 to 57 nm. The morphologies obtained presented several forms, such as spheres, wires, flowers, bars, and tetrahedrons, with a particle size variation of 35 to 165 nm. In this work it is shown that using a statistical experimental design leads us to a fast and reliable optimization of the synthesis parameters for obtaining small size ZnO nanoparticles, thus optimizing time and human and materials resources.

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Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Nanopowders by the Homogeneous Precipitation Method: Use of Taguchi’s Method for Analyzing the Effect of Different Variables

Herrera-Rivera

Olvera

Maldonado

2017

Journal of Nanomaterials

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“…Since varistors have a negative temperature characteristic [21][22][23], the contact resistance of the grain boundary under the temperature field is…”

Section: Comparison Of Simulation and Measurement Results Under 8/20 ...mentioning

confidence: 99%

Numerical modelling of MOV with Voronoi network and finite element method

et al. 2021

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The electrical and thermal characteristics of metal oxide varistor (MOV) are essential for the study of MOV performance and degradation. This paper provides a modelling method of MOV to simulate its microstructure geometry with the Voronoi network and derive the electrical functions on the grain boundaries. A series of discrete data to describe the resistance‐voltage (R–V) characteristics of MOV from experiments is applied to the proposed model. Through 8/20 μs surge current experiments, the electrical conductivity of MOV is determined to achieve the simulation of the clamping voltage. With this model, the current distribution and temperature distribution over a MOV sample are simulated and analysed by the finite element method (FEM). The simulation results show good agreement with the experimental measurement and inherent feature of MOV.

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“…In this study, the effects of Er 2 O 3 mol%, sintering process (soaking temperature and time) on microstructure and electrical characteristics of (CaMnO 3 [7,10]. Thus, by the XRD (Fig.…”

Section: Introductionmentioning

confidence: 91%

“…Varistor operate by literally absorbing the dangerous surge and spikes or grounding its. Overvoltage protection is a necessity for electronic circuits, in the electrical power distribution and transmission industries [1][2][3]. Zinc oxide (ZnO) as a based varistor commonly study due to its capability and good performance.…”

Section: Introductionmentioning

confidence: 99%