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Synthesis, structural characterization, and thermal properties of Ca- and La-doped soda-lime glasses by laser melting
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. Linnaeus University, Linnaeus Knowledge Environments, Advanced Materials. (Glass group)ORCID iD: 0000-0003-1430-2862
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. Gdańsk University of Technology, Poland.ORCID iD: 0000-0001-7927-9187
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. Linnaeus University, Linnaeus Knowledge Environments, Advanced Materials. (Glass group)ORCID iD: 0000-0002-6020-3227
Theoretical and Physical Chemistry Institute, Greece.
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2020 (English)In: International Journal of Applied Glass Science, Vol. 11, no 4, p. 699-706Article in journal (Refereed) Published
Abstract [en]

Laser melting techniques have been used in the preparation of unconventional glasscompositions with high melting temperatures. Thus, we wanted to test the feasibilityof using a CO2 laser in the preparation of nitrogen-rich oxynitride glasses and nitridesilicate glasses. Melting from oxides and metallic raw materials, we wanted to studyfirst glass formation and possible evaporation losses of the glass components. Twoglass series were prepared and studied for their structure and thermal properties, onewith Ca2+- and a higher melting La3+-doped soda-lime-silicate (SLS) series. In lessthan 3 minutes of laser melting, spheres of up to 6 mm diameter were successfullyfabricated. The obtained glass samples were homogeneous and transparent in thevisible region. X-ray diffraction and Raman spectroscopic analysis confirmed theamorphous nature of the synthesized samples. Sodium losses increase as calcium isadded to the soda-lime-silicate glass. As expected, increasing Ca2+ or La3+ additionlead to increased depolymerization of the silicate network. Moreover, the increasesin Tg with the addition of Ca2+ or La3+ ions indicating strengthening of the sodalime-silicate glass by increasing strength of the M-O bonds of divalent and trivalentions over monovalent sodium ions, weak Na-O bonds also resulting in significantevaporation loss during the short laser melting times. The thermal stability decreasesupon addition of Ca2+ or La3+ ions to the soda-lime-silicate glasses.

Place, publisher, year, edition, pages
American Ceramic Society, 2020. Vol. 11, no 4, p. 699-706
Keywords [en]
glass forming systems, IR spectroscopy, laser melting, oxide glass, raman spectroscopy
National Category
Ceramics Other Materials Engineering
Research subject
Technology (byts ev till Engineering), Glass Technology
Identifiers
URN: urn:nbn:se:lnu:diva-93699DOI: 10.1111/ijag.15477ISI: 000527091500001Scopus ID: 2-s2.0-85083673598OAI: oai:DiVA.org:lnu-93699DiVA, id: diva2:1426177
Funder
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 14-457The Crafoord Foundation, 20160900Knowledge Foundation, 68110029Available from: 2020-04-23 Created: 2020-04-23 Last updated: 2024-11-07Bibliographically approved

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Ali, SharafatWójcik, Natalia A.Jonson, BoMöncke, Doris

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