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The Effect of Remelting on the Physical Properties of Borotellurite Glass Doped with Manganese  [PDF]
Syed Putra Hashim Syed Hashim,Haji Abdul Aziz Sidek,Mohamed Kamari Halimah,Khamirul Amin Matori,Wan Mohamad Daud Wan Yusof,Mohd Hafiz Mohd Zaid
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms14011022
Abstract: A systematic set of borotellurite glasses doped with manganese (1– x) [(B 2O 3) 0.3(TeO 2) 0.7]- xMnO, with x = 0.1, 0.2, 0.3 and 0.4 mol%, were successfully synthesized by using a conventional melt and quench-casting technique. In this study, the remelting effect of the glass samples on their microstructure was investigated through density measurement and FT-IR spectra and evaluated by XRD techniques. Initial experimental results from XRD evaluation show that there are two distinct phases of glassy and crystallite microstructure due to the existence of peaks in the sample. The different physical behaviors of the studied glasses were closely related to the concentration of manganese in each phase. FTIR spectra revealed that the addition of manganese oxide contributes the transformation of TeO 4 trigonal bipyramids with bridging oxygen (BO) to TeO 3 trigonal pyramids with non-bridging oxygen (NBO).
Structural and Optical Properties of Zinc Borotellurite Glass Co-Doped with Lanthanum and Silver Oxide  [PDF]
Faznny Mohd Fudzi, Halimah Mohamed Kamari, Farah Diana Muhammad, Amirah Abd Latif, Zaitizila Ismail
Journal of Materials Science and Chemical Engineering (MSCE) , 2018, DOI: 10.4236/msce.2018.64003
A series of zinc borotellurite glass co-doped with lanthanum and silver oxide with the chemical formula of [{[(TeO2)0.7(B2O3)0.3]0.7(ZnO)0.3}0.96(La2O3)0.04]1-x(Ag2O)x where the molar frac-tion of silver oxide, x = 0.02, 0.04, 0.06, 0.08 and 0.10 had been successfully prepared via the conventional melt-quenching technique. The structural properties of the glasses were unveiled through X-ray Diffraction (XRD) and Fourier Transform Infra-Red (FTIR) spectroscopy while optical properties of the glasses were investigated with Ultra Violet Visible (UV-Vis) spectropho-toscopy. The short range periodic atomic arrangement in the glass matrix that implies the amorphous nature of the glass was confirmed with the presence of a broad hump in the XRD pattern. On the other hand, the three absorption bands observable in the FTIR spectra had proven the existence of BO4, BO3 as well as TeO4 units in the glass network. The absorbance values retrieved from UV-Vis spectroscopy were utilized to calculate the indirect energy band gap and Urbach energy values of the fabricated glass. By employing the equations proposed by Mott and Davis, the obtained indirect energy band gap have val-ues ranging from 2.16 to 4.16 eV.The decreasing trend in indirect energy band gap and increasing Urbach energy values were related to the increasing num-ber of nonbridging oxygen (NBO) in the glass that is created from the breaking of Te-O-Te or B-O-B bonds after lanthanum as well as silver oxide are incor-porated into the zinc borotellurite glass network.
Magnetic circular polarization of luminescence in Bismuth-doped silica glass  [PDF]
Oleksii Laguta,Hicham El Hamzaoui,Mohamed Bouazaoui,Vladimir B. Arion,Igor Razdobreev
Physics , 2015,
Abstract: The magnetic field induced circular polarization of near infrared photoluminescence in Bi-doped pure silica glass was studied in the spectral range of 660 - 1600 nm covering three excited state levels. The highest degree of magnetic circular polarization of luminescence was observed in the lasing, first excited state (peak emission at 1440 nm). The results of variable temperature and variable magnetic field measurements allows to conclude that the near infrared luminescence originates from an isolated non-Kramers doublet of the even-electron system.
Photoluminescence in Ga/Bi co-doped silica glass  [PDF]
Igor Razdobreev,Hicham El Hamzaoui,Vladimir B. Arion,Mohamed Bouazaoui
Physics , 2013, DOI: 10.1364/OE.22.005659
Abstract: Bismuth-Gallium co-doped silica glass fiber preform was prepared from nano-porous silica xerogels using a conventional solution doping technique with a heterotrinuclear complex and subsequent sintering. Ga-connected optical Bismuth active center (BAC) was identified as the analogue of Al-connected BAC. Visible and infrared photoluminescence (PL) were investigated in a wide temperature range of 1.46-300 K. Based on the results of the continuous wave (CW) and time resolved spectroscopy we identify the centers emitting in the spectral region of 480-820 nm as Bi$^+$ ions. The near infrared (NIR) PL around 1100 nm consists of two bands. While the first one can be ascribed to the transition in Bi$^+$ ion, the second band is presumably associated to defects. We put in evidence the energy transfer between Bi$^+$ ions and the second NIR emitting center via quadrupole-quadrupole and dipole-quadrupole mechanisms of interactions. Finally, we propose the energy level diagram of Bi$^+$ ion interacting with this defect.
Interstitial BiO molecule as a center of broadband IR luminescence in bismuth-doped silica glass  [PDF]
V. O. Sokolov,V. G. Plotnichenko,E. M. Dianov
Physics , 2011,
Abstract: IR luminescence and absorption in bismuth-doped silica glass-core fibers observed recently (see [arXiv:1106.2969v1 [physics.optics]) are argued to be caused by transitions in interstitial BiO molecules
Photoinduced Second Harmonic Generation of Bi2S3 Microcrystallite Doped Silica Glass

Hongbing CHEN,Haiping XIA,Congshan ZHU,Fuxi GAN,

材料科学技术学报 , 2001,
Abstract: Silica glasses doped with Bi2S3 microcystallite was prepared by the sol-gel process. Photoinduced second harmonic generation (SHG) was observed in the glass when it was irradiated with intense 1.06 μm and frequency doubled laser beams from a mode-locked Nd: YAG laser. It was found that the signal intensity increased with the irradiating time and approached a saturation gradually.The effect may be explained reasonably by the DC field model.
Microhardness and some fracture related problems in copper doped soda lime silica glass  [PDF]
Maria Suszynska,Maria Szmida
Optica Applicata , 2008,
Abstract: A wide range of practical problems requires the knowledge of the mechanical characteristics of doped oxide glasses. The main purpose of this study was to investigate the effect of ion exchange and a post-exchange thermal treatment upon Vickers microhardness of a multicomponent soda lime silica (SLS) glass in which the mobile sodium ions have been partially substituted by copper. It has been stated that in dependence of the indentation load, the indentation marks have been accompanied by traces of Palmqvist cracks. The deformation and fracture related phenomena are dependent on the temperature and time of the exchange and annealing processes.
Effect of Erbium Nanoparticles on Optical Properties of Zinc Borotellurite Glass System  [PDF]
Azlan Muhammad Noorazlan,Halimah Mohamed Kamari,Siti Shafinas Zulkefly,Daud W. Mohamad
Journal of Nanomaterials , 2013, DOI: 10.1155/2013/940917
Abstract: Erbium nanoparticles (NPs) doped zinc borotellurite glasses have been prepared by conventional melt-quenching technique with the chemical composition (where ). The structural properties of the prepared glasses were determined via X-ray diffraction (XRD) analysis and FTIR analysis. It was confirmed that the prepared glasses are amorphous. The bonding parameters of the glasses were analyzed by using FTIR analysis and were confirmed to be ionic in nature. The refractive index increases as the content of erbium NPs increases. The optical absorption spectra revealed that fundamental absorption edge shifts to longer wavelength as the content of erbium NPs increases. The value of band gap had been calculated and shown to be decreased with an increase content of erbium NPs. The Urbach energy was shown to be linearly increased with an increase content of erbium NPs oxides. 1. Introduction Rare-earth doped materials have made the largest interest to develop the photonic system for various applications with regard to their advance optical properties. Erbium oxide is one of the most potential candidates among the lanthanide group in the pursuit of photonic materials research. Erbium consists of trivalent electron which is known to be advantaged to fiber amplifier applications. Nowadays, special attention is paid to explore the optical behavior of the Er3+ ions due to its emission at 1.53?μm, which is ideal for applications in the field of optical data transmission [1]. The choice of a suitable host matrix is important to obtain the excellent optical properties. Tellurite oxide is known to be the best candidate among the heavy metal materials because of its unique optical and electrical properties. The compatibility and solubility of tellurite based glass to the other oxide glasses are the most excellent among the heavy metals. Recently, tellurite based glass has been used in several photonic devices such as precursors for infrared fibers and windows. Formation of pure tellurite oxide glass does not occur without contributions from external element. Borate oxide is known as the best choice to stabilize the glass formation due to its good rare earth ion solubility and hardness. The borate matrix possesses well defined gathering of BO3 triangles and BO4 tetrahedra to form stable borate groups such as diborate, triborate, and tetraborate [2]. Contributions of zinc oxide in the glass formation reduce the melting point and increases the glass forming ability. It has been reported that [3] the effect of zinc oxide decreases the optical energy gap and increase the

WU YunDENG Zhongyan,YUAN Suihuaand Technology,

材料研究学报 , 1995,
Abstract: A new kind of optical amplified comPOsite glass which was made of the porous silica glass framework doped with rare earth ions(REIs) is investigated. The REIs were soluted in the solution of the wraPPing system of chloride comPOsites followed by percolati

CHEN Hongbing,ZHU Congshan,GAN Fuxi,

材料研究学报 , 1997,
Abstract: CuI microcrystallite doped silica glasses and thin fims have been prepared successfully by the sol-gel process. The microcrystallite and distribution in the glass medium are observed by means of XRD and HRTEM. The room temperature transmission spectra of
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