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New Non-Crystalline Solids Study Findings Have Been Reported by Investigators at Central Glass and Ceramic Research Institute (Synthesis and...

August 12, 2014



New Non-Crystalline Solids Study Findings Have Been Reported by Investigators at Central Glass and Ceramic Research Institute (Synthesis and characterization of chloroborosilicate glasses in the K2O-BaO-Al2O3-B2O3-SiO2-BaCl2 system)

By a News Reporter-Staff News Editor at Journal of Technology -- Fresh data on Non-Crystalline Solids are presented in a new report. According to news reporting originating in Kolkata, India, by VerticalNews journalists, research stated, "Generally borosilicate glasses are rarely used in photonic applications. Here we modified borosilicate glass by incorporating BaCl2 with a view to their application in the area of photonics."

The news reporters obtained a quote from the research from Central Glass and Ceramic Research Institute, "Chloroborosilicate glasses in the system with general composition (mol%) (100 - x)(42SiO(2)-30B(2)O(3)-20BaO-4K(2)O-4Al(2)O(3))-xBaCl(2) (where x = 0-30) were prepared by the melt quench technique. All the glasses were found to be X-ray amorphous and transparent. They were characterized by X-ray diffraction, infrared and UV-vis-NIR spectral analyses, differential scanning calorimetry, dilatometry, refractive index, dielectric constant measurements, etc. Their glass transition temperature (T-g), coefficient of thermal expansion (CTE), refractive index and dielectric constant have been found to vary in the ranges 614-641 degrees C, 73-91 x 10(-7) K-1, 1.58-1.63 and 9.79-11.73 respectively. All the properties are found to be controlled by BaCl2 content. Their covalent character, metallization criterion and Abbe number were found to decrease with increasing BaCl2 content whereas the molar volume, average molar refraction and electronic polarizability increase with increasing BaCl2 content. The devitrified materials have been characterized by XRD which manifests the presence of BaCl2 nanoctystals of sizes 15-30 nm."

According to the news reporters, the research concluded: "Thus these glasses have the potential to develop BaCl2 nanocrystal containing low phonon energy (similar to 350 cm(-1)) glass-ceramics and are promising for different photonic applications."

For more information on this research see: Synthesis and characterization of chloroborosilicate glasses in the K2O-BaO-Al2O3-B2O3-SiO2-BaCl2 system. Journal of Non-Crystalline Solids, 2014;398():32-41. Journal of Non-Crystalline Solids can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Non-Crystalline Solids - www.elsevier.com/wps/product/cws_home/505709)

Our news correspondents report that additional information may be obtained by contacting N. Shasmal, Cent Glass & Ceram Res Inst, CSIR, Glass Sci & Technol Sect, Kolkata 700032, India. Additional authors for this research include A.R. Molla and B. Karmakar.

Keywords for this news article include: Asia, India, Kolkata, Non-Crystalline Solids

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Technology


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