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Title: Spectral analysis of Cu2+: B2O3-(TeO2/CdO/ZnO)-Li2O-AlF3 glasses
Authors: Reddy, B Sudhakar
Buddhudu, S
Keywords: Copper glasses;Optical analysis;Spectral analysis;Absorption band
Issue Date: Dec-2006
Publisher: NISCAIR-CSIR, India
IPC Code: GO1J3/28
Abstract: The development and optical spectral analysis of Cu2+ (0.5 mol %) doped three new glasses have been reported in the following composition: 10TeO2-69.5 B2O3-10 Li2O-10 AIF3; 10ZnO-69.5 B2O3-10 Li2O-10 AIF3; 10ZnO-69.5 B2O310 Li2O-10 AIF3. Due to the homogeneous distribution of Cu2+ ions, both CdO and ZnO containing glasses are found to be in bright blue colour, but a greenish blue colour has been noticed from the TeO2 containing glass, the reason for this has been explained. Without the Cu2+ ions, the reference glasses have also been prepared and found them in good transparency with excellent resistance towards the moisture without any degradation on their surfaces. Based on the XRD profiles, amorphous nature of these glasses has been confirmed. Due to the presence of TeO2, the UV transmission for the glass is found to be extended up to 300 nm compared with the other two glasses. Under an UV source (254 nm), a blue emission has been noticed from the surfaces of the glasses. From the measured absorption spectra of these copper glasses, a abroad absorption band (2B1g 2B2g) at 800 nm and a weak absorption band (2B1g 2B2g) at 387 nm have been measured to examine the effects of the CdO, ZnO and TeO2 contents in the glasses studied. FTIR spectra of these glasses have also been analyzed to investigate the glass structures. Emission spectra of (0.5 mol %) Cu2+: B2O3-(TeO2/CdO/ZnO)-Li2O-AlF3 have revealed two emissions at 415 and 438 nm with an excitation at 371 nm.
Page(s): 887-895
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.44(12) [December 2006]

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