Structural Influence on Optical Properties of Phosphate Glasses PDF Download
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Author: Ru Zhou
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Polyanionic glasses have been investigated as a new group of host materials used for laser gain media in optical fiber applications. The structure of such special glasses is based on ionic crosslinking among the different components, for example, fluoride, nitrite, and sulfate anions, together with suitable cations. By changing the concentration of different anions, it is possible to tailor the heterogeneity and structural connectivity of the glass. In my study, I use flurosulfates, fluorophosphate, and sulfophosphate, as host materials, Ni, Ag, and Ce ions as probe ions, to investigate the structural influence on optical properties of phosphate glass.
Author: Ru Zhou
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Book Description
Polyanionic glasses have been investigated as a new group of host materials used for laser gain media in optical fiber applications. The structure of such special glasses is based on ionic crosslinking among the different components, for example, fluoride, nitrite, and sulfate anions, together with suitable cations. By changing the concentration of different anions, it is possible to tailor the heterogeneity and structural connectivity of the glass. In my study, I use flurosulfates, fluorophosphate, and sulfophosphate, as host materials, Ni, Ag, and Ce ions as probe ions, to investigate the structural influence on optical properties of phosphate glass.
Author: Huyen Quyen Le
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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The aim of this research was to study the relationships between the formation, structure, and properties of the new glass system, fluoro-sulfo-phosphate poly-anionic glasses, specifically focusing on the effect of the glass structure on optical properties and electrical conductivity. In this project, the fluoro-sulfo-phosphate glass system can be divided into two groups: the FPS series [(100-x-y)MFn / xSr(PO3)2 / ySrSO4 (x + y ≤ 20%, M = Mg2+, Ca2+, Sr2+, Al3+) with F- > P2O5 + SO3] were studied as new host materials for optically active cation species, while the NAPFS series [(100-x-y)AlF3 / xNaPO3 / yNa2SO4 (x + y ≥ 80%), with F-
Author: J. M. Arzeian
Publisher:
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Category :
Languages : en
Pages :
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Author: Kuo-chou. Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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Author: Said AQDIM
Publisher: Scientific Research Publishing, Inc. USA
ISBN: 1649974337
Category : Antiques & Collectibles
Languages : en
Pages : 274
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Author: Austin Lim
Publisher:
ISBN:
Category : Glass-ceramics
Languages : en
Pages : 166
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"The main objective of this research was to evaluate the properties and structures of glasses from the stannous (SnO) phosphate system for possible use in low temperature optical applications. Glasses in the binary xSnO-(100-x)P2O5 system (50[less than or equal to]x[less than or equal to]70) were prepared and their thermal and optical properties were evaluated. Differences in glass transition temperatures (T[subscript g]) measured here and reported in the literature were explained by differences in the residual water content in the glasses, as determined by infrared spectroscopy. In general, increasing the SnO content of the binary glasses increased the refractive index and the glass transition temperature, and reduced the residual water content, producing glasses that are more chemically stable. Raman spectroscopy showed that the chain-length of the average phosphate anion decreased with increasing SnO content. The addition of B2O3 to a Sn(II)-pyrophosphate base glass (x= 67) improves the aqueous dissolution rate by an order of magnitude. The impact of these compositional changes on the optical and thermal properties depends on how the borate is added. Raman and nuclear magnetic resonance spectroscopies reveal that boron is initially incorporated into the glass network in tetrahedral sites and the pyrophosphate anions are converted to orthophosphate anions. The effects of the addition of Ga2O3 and Sb2O3 on the properties of the tin phosphate glasses were also determined. In general, the addition of these modifying oxides increase the glass transition temperature from around 250°C to 350°C, and the refractive index (nD) was in the range 1.75-1.85, depending on glass composition. The chemical durability of these modified glasses was similar to those modified by B2O3-additions. Raman spectroscopy revealed the formation of isolated orthophosphate anions in the formation of Ga (Sb)-O-P glass networks"--Abstract, leaf iv.
Author: K.J. Rao
Publisher: Elsevier
ISBN: 0080518036
Category : Science
Languages : en
Pages : 585
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Book Description
Structural Chemistry of Glasses provides detailed coverage of the subject for students and professionals involved in the physical chemistry aspects of glass research. Starting with the historical background and importance of glasses, it follows on with methods of preparation, structural and bonding theories, and criteria for glass formation including new approaches such as the constraint model. Glass transition is considered, as well as the wide range of theoretical approaches that are used to understand this phenomenon. The author provides a detailed discussion of Boson peaks, FSDP, Polymorphism, fragility, structural techniques, and theoretical modelling methods such as Monte Carlo and Molecular Dynamics simulation. The book covers ion and electron transport in glasses, mixed-alkali effect, fast ion conduction, power law and scaling behaviour, electron localization, charged defects, photo-structural effects, elastic properties, pressure-induced transitions, switching behaviour, colour, and optical properties of glasses. Special features of a variety of oxide, chalcogenide, halide, oxy-nitride and metallic gasses are discussed. With over 140 sections, this book captures most of the important and topical aspects of glass science, and will be useful for both newcomers to the subject and the experienced practitioner.
Author: J. David Musgraves
Publisher: Springer
ISBN: 9783319937267
Category : Technology & Engineering
Languages : en
Pages : 1590
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Book Description
This handbook provides comprehensive treatment of the current state of glass science from the leading experts in the field. Opening with an enlightening contribution on the history of glass, the volume is then divided into eight parts. The first part covers fundamental properties, from the current understanding of the thermodynamics of the amorphous state, kinetics, and linear and nonlinear optical properties through colors, photosensitivity, and chemical durability. The second part provides dedicated chapters on each individual glass type, covering traditional systems like silicates and other oxide systems, as well as novel hybrid amorphous materials and spin glasses. The third part features detailed descriptions of modern characterization techniques for understanding this complex state of matter. The fourth part covers modeling, from first-principles calculations through molecular dynamics simulations, and statistical modeling. The fifth part presents a range of laboratory and industrial glass processing methods. The remaining parts cover a wide and representative range of applications areas from optics and photonics through environment, energy, architecture, and sensing. Written by the leading international experts in the field, the Springer Handbook of Glass represents an invaluable resource for graduate students through academic and industry researchers working in photonics, optoelectronics, materials science, energy, architecture, and more.
Author: Fuxi Gan
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 304
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Book Description
Modern optical technology calls for new glasses with special properties for optical and optoelectronic devices. This text, based on modern quantum optical theories, aims to relate optical and spectroscopic properties to the composition and structure of glass-forming materials.
Author: Charmayne Elizabeth Smith
Publisher:
ISBN:
Category : Glass-ceramics
Languages : en
Pages : 180
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Book Description
"This dissertation focuses on the properties and structures of ternary zinc phosphate glasses that have recently been investigated as substrates for femto-second (fs) laser writing. Although these glasses have potential for use as optical substrates, their poor chemical properties limit their applications. In this work, ternary zinc phosphate glasses were studied to find compositions with enhanced chemical durability and the properties and structures of the investigated glasses are reported. Paper 1 and Paper 2 include the first systematic studies of the properties, structures of zinc aluminophosphate (ZAP) glasses and phase relationships in the ZnO-Al2O3-P2O5 system, respectively. Adding alumina to a Zn-metaphosphate glass reduces dissolution rates in water by 4 orders of magnitude and increases the glass transition temperatures. The average Al coordination number can be predicted from a structural model that considers the number of non-bridging oxygens to coordinate metal cations, and this work is the first reported use of this model for a ternary phosphate glass. Paper 3 is the first systematic study of how the properties and structures of zinc magnesium polyphosphate glasses change when MgO replaces ZnO for compositions with fixed O/P ratios. The Mg2 and Zn2+ ions have similar field strengths, but have much different effects on glass properties that are discussed in terms of relative polarizabilities (refractivities) and electron configurations of the Mg2+ and Zn2+ ions. In Paper 4, the creation of electronic defects in zinc phosphate glasses by exposure to ultraviolet and x-ray radiation is described. The nature of the defects formed is dependent on the glass composition and similar defects are created when these glasses are exposed to femto-second laser radiation."--Abstract, page iv.
