The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition

In this study, the grain growth behaviour of ZnO-V(2)O(5)-based ceramics with 0.25–0.75 mol% additions of PrMnO(3) was systematically investigated during sintering from 850 °C to 925 °C. with the aim to control the ZnO grain size for their application as varistors. It was found that with the increas...

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Autores principales: Xu, Maofeng, Cai, Changkun, Shi, Yu, Xie, Manyi, Wu, Yanlong, Liu, Yuanyuan, Peng, Jun, Bao, Jinxiao, An, Shengli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875393/
https://www.ncbi.nlm.nih.gov/pubmed/35208337
http://dx.doi.org/10.3390/mi13020214
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author Xu, Maofeng
Cai, Changkun
Shi, Yu
Xie, Manyi
Wu, Yanlong
Liu, Yuanyuan
Peng, Jun
Bao, Jinxiao
An, Shengli
author_facet Xu, Maofeng
Cai, Changkun
Shi, Yu
Xie, Manyi
Wu, Yanlong
Liu, Yuanyuan
Peng, Jun
Bao, Jinxiao
An, Shengli
author_sort Xu, Maofeng
collection PubMed
description In this study, the grain growth behaviour of ZnO-V(2)O(5)-based ceramics with 0.25–0.75 mol% additions of PrMnO(3) was systematically investigated during sintering from 850 °C to 925 °C. with the aim to control the ZnO grain size for their application as varistors. It was found that with the increased addition of PrMnO(3), in addition to the decrease in the average grain size, the grain size distribution also narrowed and eventually changed from a bimodal to unimodal distribution after a 0.75 mol% PrMnO(3) addition. The grain growth control was achieved by a pinning effect of the secondary ZnCr(2)O(4) and PrVO(4) phases at the ZnO grain boundaries. The apparent activation energy of the ZnO grain growth in these ceramics was found to increase with increased additions of PrVO(4), hence the observed reduction in the ZnO grain sizes.
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spelling pubmed-88753932022-02-26 The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition Xu, Maofeng Cai, Changkun Shi, Yu Xie, Manyi Wu, Yanlong Liu, Yuanyuan Peng, Jun Bao, Jinxiao An, Shengli Micromachines (Basel) Article In this study, the grain growth behaviour of ZnO-V(2)O(5)-based ceramics with 0.25–0.75 mol% additions of PrMnO(3) was systematically investigated during sintering from 850 °C to 925 °C. with the aim to control the ZnO grain size for their application as varistors. It was found that with the increased addition of PrMnO(3), in addition to the decrease in the average grain size, the grain size distribution also narrowed and eventually changed from a bimodal to unimodal distribution after a 0.75 mol% PrMnO(3) addition. The grain growth control was achieved by a pinning effect of the secondary ZnCr(2)O(4) and PrVO(4) phases at the ZnO grain boundaries. The apparent activation energy of the ZnO grain growth in these ceramics was found to increase with increased additions of PrVO(4), hence the observed reduction in the ZnO grain sizes. MDPI 2022-01-29 /pmc/articles/PMC8875393/ /pubmed/35208337 http://dx.doi.org/10.3390/mi13020214 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Maofeng
Cai, Changkun
Shi, Yu
Xie, Manyi
Wu, Yanlong
Liu, Yuanyuan
Peng, Jun
Bao, Jinxiao
An, Shengli
The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title_full The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title_fullStr The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title_full_unstemmed The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title_short The Grain Growth Control of ZnO-V(2)O(5) Based Varistors by PrMnO(3) Addition
title_sort grain growth control of zno-v(2)o(5) based varistors by prmno(3) addition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875393/
https://www.ncbi.nlm.nih.gov/pubmed/35208337
http://dx.doi.org/10.3390/mi13020214
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