Download PDF by Rong Ping Wang: Amorphous Chalcogenides: Advances and Applications

By Rong Ping Wang

ISBN-10: 9814411299

ISBN-13: 9789814411295

ISBN-10: 9814411302

ISBN-13: 9789814411301

This e-book presents a entire evaluation of the chalcogenide glass technological know-how and numerous functions according to the glasses. It begins with a evaluation at the glass-forming skill of assorted structures, via a dialogue at the structural and actual houses of varied chalcolgenide glasses and their software in built-in optics. The chapters were contributed by way of admired specialists from all over the place the Read more...

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5 W/cm2 can induce localized photorelaxation that results in photocontraction instead of photoexpansion, as illustrated in Fig. 21 [87]. This phenomenon is particularly pronounced in fragile samples that have been quenched in a high ϐictive temperature state and have consequently developed a large driving force for relaxation. Low-intensity irradiation in such glasses results in giant photocontraction, as depicted in Fig. 21b. In contrast, high-intensity irradiation in a previously annealed glass results in conventional photoexpansion, as depicted in Fig.

This proviso justiϐies the use of liquid/glass thermodynamic data for studying the effect of mean coordination on fragility. This is of particular interest for chalcogenide glasses since network connectivity and its temperature dependence are indeed expected to strongly affect the strong/fragile behavior across continuous compositional domains. 3 Fragility Index While the viscosity–temperature plots provide a clear visual estimate of fragility, it is more convenient to establish a single parameter that provides a quantitative measure of fragility.

3 dB/ cm can be obtained through this method [88]. 3 Radiation Dosimetry The change in physical properties of chalcogenide glasses during irradiation with gamma rays has long been considered an effective approach for radiation dosimetry [80, 81]. The structural 49 50 Relaxation and Fragility in Chalcogenide Network Glasses modiϐications observed during gamma ray relaxation leads to densiϐication of the glass concurrent with the enthalpy decrease. The densiϐication process results in an increase in microhardness [81], as well as a signiϐicant change in optical properties [79].

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Amorphous Chalcogenides: Advances and Applications by Rong Ping Wang

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