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Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.

Photopyroelectric spectroscopy is used to investigate the optical absorption behaviour of the ceramic composite (ZnO + 1 MnO + y Dy2O3), where y = 0 - 2 mol%. Ceramics were sintered at 1200 and 1300°C for 1 and 5 h. PPE spectrum with reference to the doping level and sintering time is discussed. Opt...

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Main Authors: Rizwan, Zahid, Zakaria, Azmi, Sabri, M.G.M.
Format: Article
Language:English
English
Published: Academic Journals 2011
Online Access:http://psasir.upm.edu.my/id/eprint/24923/1/Effect%20of%20heat%20treatment%20on%20the%20optical%20properties%20of%20ceramic%20ZnO.pdf
http://psasir.upm.edu.my/id/eprint/24923/
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spelling my.upm.eprints.249232015-10-30T07:36:51Z http://psasir.upm.edu.my/id/eprint/24923/ Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3. Rizwan, Zahid Zakaria, Azmi Sabri, M.G.M. Photopyroelectric spectroscopy is used to investigate the optical absorption behaviour of the ceramic composite (ZnO + 1 MnO + y Dy2O3), where y = 0 - 2 mol%. Ceramics were sintered at 1200 and 1300°C for 1 and 5 h. PPE spectrum with reference to the doping level and sintering time is discussed. Optical energy band-gap (Eg) is determined from the plot (ρhυ)2 vs hυ. It is found that the the value of Eg is reduced from 3.2 (pure ZnO) to 2.15 eV at the 0 mol% of Dy2O3 and is further reduced to 2.04 eV at the 2 mol% of Dy2O3 for 5 h sintering time at the 1300°C sintering temperature. Steepness factor σA and σB which characterizes the slope of exponential optical absorption is discussed with reference to the variation in the value of Eg. The phase constitution is determined by XRD analysis. Microstructure and compositional analysis are analyzed using SEM and EDAX. The maximum grain size and density of the ceramic were found to be 14 μm, 89%, respectively. Academic Journals 2011-02-04 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24923/1/Effect%20of%20heat%20treatment%20on%20the%20optical%20properties%20of%20ceramic%20ZnO.pdf Rizwan, Zahid and Zakaria, Azmi and Sabri, M.G.M. (2011) Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3. International Journal of Physical Sciences, 6 (3). pp. 523-528. ISSN 1992-1950 http://academicjournals.org 10.5897/IJPS10.419 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Photopyroelectric spectroscopy is used to investigate the optical absorption behaviour of the ceramic composite (ZnO + 1 MnO + y Dy2O3), where y = 0 - 2 mol%. Ceramics were sintered at 1200 and 1300°C for 1 and 5 h. PPE spectrum with reference to the doping level and sintering time is discussed. Optical energy band-gap (Eg) is determined from the plot (ρhυ)2 vs hυ. It is found that the the value of Eg is reduced from 3.2 (pure ZnO) to 2.15 eV at the 0 mol% of Dy2O3 and is further reduced to 2.04 eV at the 2 mol% of Dy2O3 for 5 h sintering time at the 1300°C sintering temperature. Steepness factor σA and σB which characterizes the slope of exponential optical absorption is discussed with reference to the variation in the value of Eg. The phase constitution is determined by XRD analysis. Microstructure and compositional analysis are analyzed using SEM and EDAX. The maximum grain size and density of the ceramic were found to be 14 μm, 89%, respectively.
format Article
author Rizwan, Zahid
Zakaria, Azmi
Sabri, M.G.M.
spellingShingle Rizwan, Zahid
Zakaria, Azmi
Sabri, M.G.M.
Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
author_facet Rizwan, Zahid
Zakaria, Azmi
Sabri, M.G.M.
author_sort Rizwan, Zahid
title Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
title_short Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
title_full Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
title_fullStr Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
title_full_unstemmed Effect of heat treatment on the optical properties of ceramic ZnO-MnO-Dy2O3.
title_sort effect of heat treatment on the optical properties of ceramic zno-mno-dy2o3.
publisher Academic Journals
publishDate 2011
url http://psasir.upm.edu.my/id/eprint/24923/1/Effect%20of%20heat%20treatment%20on%20the%20optical%20properties%20of%20ceramic%20ZnO.pdf
http://psasir.upm.edu.my/id/eprint/24923/
http://academicjournals.org
_version_ 1643828505298862080
score 13.211869

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