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Titlebook: Halide Glasses for Infrared Fiberoptics; Rui M. Almeida Book 1987 Springer Science+Business Media Dordrecht 1987 chemistry.crystal.diffrac

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发表于 2025-3-21 18:43:41 | 显示全部楼层 |阅读模式
书目名称Halide Glasses for Infrared Fiberoptics
编辑Rui M. Almeida
视频videohttp://file.papertrans.cn/421/420562/420562.mp4
丛书名称NATO Science Series E:
图书封面Titlebook: Halide Glasses for Infrared Fiberoptics;  Rui M. Almeida Book 1987 Springer Science+Business Media Dordrecht 1987 chemistry.crystal.diffrac
描述The field of heavy metal halide glasses (namely fluorides) is only ten years old now, but it has developed rapidly since the discovery of fluorozirconate glasses by the group at the University of Rennes (France). The main reason for this was the early demonstration of the enormous potential of such glasses for use as long-haul ultra-low loss middle infrared waveguide materials, aided in part by the scientific interest held by their unusual short range structures. As a result, significant research efforts were initiated in the academic, government and industrial sectors in Europe, the United States and Japan. However, the search for a finished product has per­ haps led to a partial overlooking of some of the more funda­ mental aspects by the scientific community. After the initial excitement, the workers in this field are perhaps at a crossroads where attenuations lower than 1 dB/Km need to be obtained for long lengths of fiber of good chemical and thermal stability, in order to guarantee continual R&D sUE ports. Therefore, there is a strong need for a critical asses­ sment of the potential of halide glasses for infrared fiber­ optics and the formulation of recommendations for futur
出版日期Book 1987
关键词chemistry; crystal; diffraction; dynamics; glass; spectroscopy
版次1
doihttps://doi.org/10.1007/978-94-009-3561-7
isbn_softcover978-94-010-8093-4
isbn_ebook978-94-009-3561-7Series ISSN 0168-132X
issn_series 0168-132X
copyrightSpringer Science+Business Media Dordrecht 1987
The information of publication is updating

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发表于 2025-3-21 22:56:07 | 显示全部楼层
High Purity Components for Fluorozirconate Glass Optical Fibersow-loss heavy metal fluoride glass (HMFG) fiber is described. The specific areas of cation and anion purification techniques addressed are sublimation, [1] crystallization, electrolytic processing, [2] chemical vapor purification (CVP), [3] and solvent extraction. Additionally, reactive atmosphere p
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Chemical Analysis of Trace Impuritiesper-trillion level. These sensitivities are required for transition-metal and rare-earth ions, as well as for ammonium, hydroxide, and some other nonmetallic ions. Dissolved oxygen, carbon dioxide, and even argon are also of concern, as is dispersed elemental carbon..The materials-purification commu
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Role of Impurities in Halide Glassesing materials used. Among these elements which contaminate the optical glass quality, the most frequently met are the transition metals, the rare earths, the oxides, the carbon traces and some ions (NH.., Cl....) resulting from NH.HF. or CCl. treatment. The effects of such impurities on the glass pr
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Vibrational Spectroscopy Studies of Halide Glass Structurezed Raman scattering spectroscopy results for a series of heavy metal halide glasses, including binary glasses based on HfF., ThF., ZnCl. and ZnBr...The short range structures which best agree with the vibrational spectra are discussed, based on a model which includes two types of stretching force c
发表于 2025-3-22 14:56:57 | 显示全部楼层
Diffraction Studies of Halide Glassesparation, or partial separation, of individual component correlation functions. These are particularly important in structural investigations of the complex multicomponent fluorozirconate and other heavy metal fluoride glasses which are the subject of the present workshop. The structures of heavy me
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Molecular Dynamics Simulations of Fluorozirconate Glass Structureis technique have concluded that Zr ions are on average in eightfold coordinated sites, whilst barium ions have coordination numbers between 10 and 11. ZrF. coordination polyhedra are principally linked by corner sharing although edge sharing also occurs, the proportion varying somewhat between mode
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Structural Relaxation in Fluoride Glassesions are that no property changes due to structural relaxation are likely to occur at ambient temperature over periods of tens of years. Some of the lower Tg glasses, however, did exhibit detectable structural relaxation on annealing at temperatures as low as 100°C over roughly a one year time perio
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