Influence of CuO and Al₂O₃ addition on the optical properties of sodium zinc phosphate glass absorption filters

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• 作者：Y.H. Elbashar^a ; M. Ibrahim Ali^a ; ^{ibrahim_ali898@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; H.A. Elshaikh^a ; Ahmed Gamal El-Din Mostafa^b
• 关键词：Spectroscopic analysis ; Bandpass filter ; Optical properties ; Phosphate glass
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：127
• 期：18
• 页码：7041-7053
• 全文大小：2788 K

文摘

The phosphate glasses having chemical composition of 45P₂O₅-(35-y)ZnO-(20-x)Na₂O-xCuO-yAl₂O₃ (0 ≤ x ≤ 5, 0 ≤ y ≤ 4) have been prepared using the melt quenching technique. XRD analysis has been carried out on the investigated samples in order for confirming the amorphous nature. The density has been measured using Archimedes method and then the molar volume has been calculated. It is found that the density, unlike molar volume, increases with increasing CuO content. This is due to the difference in atomic weight between Cu and Na. Addition of Al₂O₃ causes a slight decrease in density and a large increase in molar volume. The ionic concentration, inter ionic distance and oxygen packing density have been calculated for all investigated glasses. Using optical absorption, the optical bandgap has been calculated and found to decrease with increasing CuO concentration. This decrease becomes slower in the presence of Al₂O₃ which makes an increase in the bandgap at the the absence of CuO. The transmission spectrum of the investigated glasses shows that the samples containing CuO behave as bandpass filters. the characterized parameters of these filters, i.e. area, center, width, height and full wave half maximum (FWHM) of bandpass, have been estimated. These parameters have been found to be more affected by CuO and Al₂O₃ addition. The refractive index, extinction coefficient, real and imaginary part of the dielectric constant have also been calculated at the bandpass.