Photopyro-electric 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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
MDPI
2011
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/24925/ http://psasir.upm.edu.my/id/eprint/24925/1/Photopyro-electric%20spectroscopic%20studies%20of%20ZnO-MnO2-Co3O4-V2O5%20ceramics..pdf |
| _version_ | 1848845168938057728 |
|---|---|
| author | Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri |
| author_facet | Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri |
| author_sort | Zakaria, Azmi |
| 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. |
| first_indexed | 2025-11-15T08:42:32Z |
| format | Article |
| id | upm-24925 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:42:32Z |
| publishDate | 2011 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-249252015-11-23T02:07:39Z http://psasir.upm.edu.my/id/eprint/24925/ Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. Zakaria, Azmi Rizwan, Zahid 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 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24925/1/Photopyro-electric%20spectroscopic%20studies%20of%20ZnO-MnO2-Co3O4-V2O5%20ceramics..pdf Zakaria, Azmi and Rizwan, Zahid and Mohd Ghazali, Mohd Sabri (2011) Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. International Journal of Molecular Sciences, 12 (1). pp. 1625-1632. ISSN 1422-0067; ESSN:1422-0067 http://www.mdpi.com/ 10.3390/ijms12031625 English |
| spellingShingle | Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title | Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title_full | Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title_fullStr | Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title_full_unstemmed | Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title_short | Photopyro-electric spectroscopic studies of ZnO-MnO2-Co3O4-V2O5 ceramics. |
| title_sort | photopyro-electric spectroscopic studies of zno-mno2-co3o4-v2o5 ceramics. |
| url | http://psasir.upm.edu.my/id/eprint/24925/ http://psasir.upm.edu.my/id/eprint/24925/ http://psasir.upm.edu.my/id/eprint/24925/ http://psasir.upm.edu.my/id/eprint/24925/1/Photopyro-electric%20spectroscopic%20studies%20of%20ZnO-MnO2-Co3O4-V2O5%20ceramics..pdf |