Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses

Five series of glasses with the chemical compositions xB2O3–(50–x)P2O5– 20CaO–30ZnO, (0 = x = 50 mol%), xZnO–(50–x)CaO–20B2O3–30P2O5, (0 = x = 50 mol%), 20B2O3–30P2O5–20CaO–30ZnO–xMnO2, (0 = x = 10 mol%), xB2O3–(50– x)P2O5–19CaO–30ZnO–1MnO2, (0 = x = 50 mol%) and xZnO–(30–x)CaO–35B2O3– 34P2O5–1MnO2,...

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Main Author:	Wan, Ming Hua
Format:	Thesis
Language:	English
Published:	2015
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/78625/1/WanMingHuaPFS2015.pdf
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spelling	my-utm-ep.786252018-08-29T07:53:09Z Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses 2015-01 Wan, Ming Hua QC Physics Five series of glasses with the chemical compositions xB2O3–(50–x)P2O5– 20CaO–30ZnO, (0 = x = 50 mol%), xZnO–(50–x)CaO–20B2O3–30P2O5, (0 = x = 50 mol%), 20B2O3–30P2O5–20CaO–30ZnO–xMnO2, (0 = x = 10 mol%), xB2O3–(50– x)P2O5–19CaO–30ZnO–1MnO2, (0 = x = 50 mol%) and xZnO–(30–x)CaO–35B2O3– 34P2O5–1MnO2, (0 = x = 30 mol%) were prepared using conventional melt quenching technique following by annealing process. The structure of the glasses were characterized using X–ray diffraction (XRD), Fourier transform infrared (FT– IR) and Raman spectroscopy. XRD analysis confirmed amorphous phase of the glass samples. The IR spectra reveal the coexistence of BO3, BO4, PO3 and PO4 structural units in the glass samples. While the Raman spectra reveals the presence of P–O–B network in the glass samples. The optical properties of the glass samples were characterized using ultraviolet visible near infrared (UV–Vis–NIR) spectroscopy and photoluminescence spectroscopy. The UV–Vis–NIR spectra reveal the presence of both Mn2+ and Mn3+ ions when manganese was doped in borophosphate glasses. Meanwhile, the emission spectra of borophosphate glasses exhibited a green light emission due to tetrahedral symmetry and a red light emission due to octahedral symmetry. The decay curves of 4T1g energy level of Mn ions were examined for all concentrations and the measured lifetimes were dependent on concentration of Mn ions and composition of the glass. The paramagnetic properties were studied using electron spin resonance (ESR) spectroscopy. The ESR spectra reveal that the resonance peak occurring at geff ˜ 2.0, 3.3 and 4.3. The resonance peak at geff ˜ 2.0 with six lines hyperfine structure due to Mn2+ ions in an environment close to octahedral symmetry whereas the resonance peak at geff ˜ 3.3 and geff ˜ 4.3 is attributed to the rhombic surroundings of the Mn2+ ions. 2015-01 Thesis http://eprints.utm.my/id/eprint/78625/ http://eprints.utm.my/id/eprint/78625/1/WanMingHuaPFS2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94669 phd doctoral Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Wan, Ming Hua Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
description	Five series of glasses with the chemical compositions xB2O3–(50–x)P2O5– 20CaO–30ZnO, (0 = x = 50 mol%), xZnO–(50–x)CaO–20B2O3–30P2O5, (0 = x = 50 mol%), 20B2O3–30P2O5–20CaO–30ZnO–xMnO2, (0 = x = 10 mol%), xB2O3–(50– x)P2O5–19CaO–30ZnO–1MnO2, (0 = x = 50 mol%) and xZnO–(30–x)CaO–35B2O3– 34P2O5–1MnO2, (0 = x = 30 mol%) were prepared using conventional melt quenching technique following by annealing process. The structure of the glasses were characterized using X–ray diffraction (XRD), Fourier transform infrared (FT– IR) and Raman spectroscopy. XRD analysis confirmed amorphous phase of the glass samples. The IR spectra reveal the coexistence of BO3, BO4, PO3 and PO4 structural units in the glass samples. While the Raman spectra reveals the presence of P–O–B network in the glass samples. The optical properties of the glass samples were characterized using ultraviolet visible near infrared (UV–Vis–NIR) spectroscopy and photoluminescence spectroscopy. The UV–Vis–NIR spectra reveal the presence of both Mn2+ and Mn3+ ions when manganese was doped in borophosphate glasses. Meanwhile, the emission spectra of borophosphate glasses exhibited a green light emission due to tetrahedral symmetry and a red light emission due to octahedral symmetry. The decay curves of 4T1g energy level of Mn ions were examined for all concentrations and the measured lifetimes were dependent on concentration of Mn ions and composition of the glass. The paramagnetic properties were studied using electron spin resonance (ESR) spectroscopy. The ESR spectra reveal that the resonance peak occurring at geff ˜ 2.0, 3.3 and 4.3. The resonance peak at geff ˜ 2.0 with six lines hyperfine structure due to Mn2+ ions in an environment close to octahedral symmetry whereas the resonance peak at geff ˜ 3.3 and geff ˜ 4.3 is attributed to the rhombic surroundings of the Mn2+ ions.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Wan, Ming Hua
author_facet	Wan, Ming Hua
author_sort	Wan, Ming Hua
title	Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
title_short	Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
title_full	Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
title_fullStr	Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
title_full_unstemmed	Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
title_sort	structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2015
url	http://eprints.utm.my/id/eprint/78625/1/WanMingHuaPFS2015.pdf
_version_	1747818031467200512

Structural and optical properties of undoped and manganese doped calcium zinc borophosphate glasses

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