Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics
Photopyroelectric (PPE) spectroscopy is a nondestructive tool that is used to study the optical properties of the ceramics (ZnO + 0.4MnO2 + 0.4Co3O4 + xV2O5), x = 0–1 mol%. Wavelength of incident light, modulated at 10 Hz, was in the range of 300–800 nm. PPE spectrum with reference to the doping lev...
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MDPI AG
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/36530/ http://psasir.upm.edu.my/id/eprint/36530/1/36530.pdf |
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| author | Rizwan, Zahid Zakaria, Azmi Mohd Ghazali, Mohd Sabri |
| author_facet | Rizwan, Zahid Zakaria, Azmi Mohd Ghazali, Mohd Sabri |
| author_sort | Rizwan, Zahid |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Photopyroelectric (PPE) spectroscopy is a nondestructive tool that is used to study the optical properties of the ceramics (ZnO + 0.4MnO2 + 0.4Co3O4 + xV2O5), x = 0–1 mol%. Wavelength of incident light, modulated at 10 Hz, was in the range of 300–800 nm. PPE spectrum with reference to the doping level and sintering temperature is discussed. Optical energy band-gap (Eg) was 2.11 eV for 0.3 mol% V2O5 at a sintering temperature of 1025°C as determined from the plot (ρhυ)2 versus hυ. With a further increase in V2O5, the value of Eg was found to be 2.59 eV. Steepness factor ‘σA’ and ‘σB’, which characterize the slope of exponential optical absorption, is discussed with reference to the variation of Eg. XRD, SEM and EDAX are also used for characterization of the ceramic. For this ceramic, the maximum relative density and grain size was observed to be 91.8% and 9.5 μm, respectively. |
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| format | Article |
| id | upm-36530 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:33:14Z |
| publishDate | 2011 |
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| spelling | upm-365302016-04-06T05:18:19Z http://psasir.upm.edu.my/id/eprint/36530/ Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics Rizwan, Zahid Zakaria, Azmi Mohd Ghazali, Mohd Sabri Photopyroelectric (PPE) spectroscopy is a nondestructive tool that is used to study the optical properties of the ceramics (ZnO + 0.4MnO2 + 0.4Co3O4 + xV2O5), x = 0–1 mol%. Wavelength of incident light, modulated at 10 Hz, was in the range of 300–800 nm. PPE spectrum with reference to the doping level and sintering temperature is discussed. Optical energy band-gap (Eg) was 2.11 eV for 0.3 mol% V2O5 at a sintering temperature of 1025°C as determined from the plot (ρhυ)2 versus hυ. With a further increase in V2O5, the value of Eg was found to be 2.59 eV. Steepness factor ‘σA’ and ‘σB’, which characterize the slope of exponential optical absorption, is discussed with reference to the variation of Eg. XRD, SEM and EDAX are also used for characterization of the ceramic. For this ceramic, the maximum relative density and grain size was observed to be 91.8% and 9.5 μm, respectively. MDPI AG 2011-03-03 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/36530/1/36530.pdf Rizwan, Zahid and Zakaria, Azmi and Mohd Ghazali, Mohd Sabri (2011) Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. International Journal of Molecular Sciences, 12 (3). pp. 1625-1632. ISSN 1661-6596; ESSN: 1422-0067 http://www.mdpi.com/1422-0067/12/3/1625 10.3390/ijms12031625 |
| spellingShingle | Rizwan, Zahid Zakaria, Azmi Mohd Ghazali, Mohd Sabri Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title | Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title_full | Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title_fullStr | Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title_full_unstemmed | Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title_short | Photopyroelectric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics |
| title_sort | photopyroelectric spectroscopic studies of zno-mno2-co3o4-v2o5 ceramics |
| url | http://psasir.upm.edu.my/id/eprint/36530/ http://psasir.upm.edu.my/id/eprint/36530/ http://psasir.upm.edu.my/id/eprint/36530/ http://psasir.upm.edu.my/id/eprint/36530/1/36530.pdf |