The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor
The zinc oxide based varistor are widely used as circuit protective devices by literally absorbs these dangerous surges and spikes or grounding this unwanted magnitudes. In this research, zinc oxide is added with 0.5 mol % CaMnO3 as an additive and 0.2 mol % of rare earth doped of lanthanum oxide. C...
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| Format: | Article |
| Language: | English |
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Trans Tech Publications
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/13208/ http://psasir.upm.edu.my/id/eprint/13208/1/The%20sintering%20effect%20of%20lanthanum-calcium%20manganite%20doping%20on%20microstructure%20and%20non-linear%20coefficient%20of%20zinc%20oxide%20varistor.pdf |
| _version_ | 1848842049705476096 |
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| author | Mohd Ghazali, Mohd Sabri Mohamed Nawawi, Mohamed Fitri Zulkifli, Mohamad Azman Wan Abdullah, Wan Rafizah Zakaria, Azmi |
| author_facet | Mohd Ghazali, Mohd Sabri Mohamed Nawawi, Mohamed Fitri Zulkifli, Mohamad Azman Wan Abdullah, Wan Rafizah Zakaria, Azmi |
| author_sort | Mohd Ghazali, Mohd Sabri |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The zinc oxide based varistor are widely used as circuit protective devices by literally absorbs these dangerous surges and spikes or grounding this unwanted magnitudes. In this research, zinc oxide is added with 0.5 mol % CaMnO3 as an additive and 0.2 mol % of rare earth doped of lanthanum oxide. Citrate-gel method is used as fabrication method. Complex compound undergoes sintering process which varied at 900 °C, 950 °C and 1000 °C, while, the sintering time are setting at 1 hour and 2 hours. Thermo gravimetric analysis (TGA) shows the forming of CaMnO3 at 334-1000 °C. Fourier Transform Infrared (FTIR) spectra proved that the functional group present are.-O-H, C-H and C-O. The surface morphology with the grains size below 1μm was observed by Scanning Electron Microscopy (SEM). The α varistor ceramics was calculated from data analysis of I-V characteristics obtained through a Source Measure Unit (Keithley 236). The calculation of α is done by using Origin Pro8.0 software. I-V characteristic shows the value of α in the range of 1.00 to 4.05. |
| first_indexed | 2025-11-15T07:52:57Z |
| format | Article |
| id | upm-13208 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:52:57Z |
| publishDate | 2016 |
| publisher | Trans Tech Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-132082016-06-10T08:56:43Z http://psasir.upm.edu.my/id/eprint/13208/ The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor Mohd Ghazali, Mohd Sabri Mohamed Nawawi, Mohamed Fitri Zulkifli, Mohamad Azman Wan Abdullah, Wan Rafizah Zakaria, Azmi The zinc oxide based varistor are widely used as circuit protective devices by literally absorbs these dangerous surges and spikes or grounding this unwanted magnitudes. In this research, zinc oxide is added with 0.5 mol % CaMnO3 as an additive and 0.2 mol % of rare earth doped of lanthanum oxide. Citrate-gel method is used as fabrication method. Complex compound undergoes sintering process which varied at 900 °C, 950 °C and 1000 °C, while, the sintering time are setting at 1 hour and 2 hours. Thermo gravimetric analysis (TGA) shows the forming of CaMnO3 at 334-1000 °C. Fourier Transform Infrared (FTIR) spectra proved that the functional group present are.-O-H, C-H and C-O. The surface morphology with the grains size below 1μm was observed by Scanning Electron Microscopy (SEM). The α varistor ceramics was calculated from data analysis of I-V characteristics obtained through a Source Measure Unit (Keithley 236). The calculation of α is done by using Origin Pro8.0 software. I-V characteristic shows the value of α in the range of 1.00 to 4.05. Trans Tech Publications 2016 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/13208/1/The%20sintering%20effect%20of%20lanthanum-calcium%20manganite%20doping%20on%20microstructure%20and%20non-linear%20coefficient%20of%20zinc%20oxide%20varistor.pdf Mohd Ghazali, Mohd Sabri and Mohamed Nawawi, Mohamed Fitri and Zulkifli, Mohamad Azman and Wan Abdullah, Wan Rafizah and Zakaria, Azmi (2016) The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor. Materials Science Forum, 846. pp. 142-148. ISSN 0255-5476; ESSN: 1662-9752 http://www.scientific.net/MSF.846.142 10.4028/www.scientific.net/MSF.846.142 |
| spellingShingle | Mohd Ghazali, Mohd Sabri Mohamed Nawawi, Mohamed Fitri Zulkifli, Mohamad Azman Wan Abdullah, Wan Rafizah Zakaria, Azmi The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title | The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title_full | The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title_fullStr | The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title_full_unstemmed | The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title_short | The sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| title_sort | sintering effect of lanthanum-calcium manganite doping on microstructure and non-linear coefficient of zinc oxide varistor |
| url | http://psasir.upm.edu.my/id/eprint/13208/ http://psasir.upm.edu.my/id/eprint/13208/ http://psasir.upm.edu.my/id/eprint/13208/ http://psasir.upm.edu.my/id/eprint/13208/1/The%20sintering%20effect%20of%20lanthanum-calcium%20manganite%20doping%20on%20microstructure%20and%20non-linear%20coefficient%20of%20zinc%20oxide%20varistor.pdf |