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Waveguide Glasses
Published in Marvin J. Weber, and TECHNOLOGY, 2020
Steven T. Davey, B. James Ainslie, Richard Wyatt
Commercial phosphate glass compositions are based on alkali metaphosphates with alkaline earth oxides and aluminium oxides added for improved optical and mechanical properties.23 The structure of phosphate glasses is similar to the silicates. Phosphorus is fourfold coordinated with oxygen forming a tetrahedral network with each phosphorus atom double-bonded to one oxygen atom and sharing the remaining three. The other oxides such as the alkali and alkali earths are probably incorporated into the glass network in a way similar to the silicates. The likely coordination of the lanthanides in phosphate glasses is about eight because this coordination is found in phosphate crystals.
Investigation of the Influence of TeO2 on the Elastic and Radiation Shielding Capabilities of Phospho-Tellurite Glasses Doped With Sm2O3
Published in Nuclear Science and Engineering, 2023
Sangeeta B. Kolavekar, G. B. Hiremath, N. M. Badiger, N. H. Ayachit
It is well known that materials having a high atomic number are being used as shielding materials to shield gamma radiation. Lead is one of those elements that is used in shielding materials for the absorption of gamma-ray radiation. However, lead has several drawbacks, such as high toxicity, heavy nature, and poor flexibility. Several investigators have found new shielding materials to shield gamma-ray radiation effectively that are nontoxic in nature.1 Several researchers2–11 have studied concrete, alloys, glasses, and polymers for shielding nuclear radiation. The glasses have unique properties, such as high hardness, noncorrosiveness, and high transparency, and they are nontoxic, flexible in structure, and environmentally friendly. Heavy metal oxide–doped glasses play a significant role in radiation shielding processes, and phosphate glass has high mechanical, good chemical, and high thermal stability.