Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

Otsuka T, Brehl M, Cicconi MR, de Ligny D, Hayakawa T (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Materials MDPI

Book Volume: 14

Journal Issue: 4

DOI: 10.3390/ma14040952

Abstract

Thermal evolutions of calcium-tungstate-borate glasses were investigated for the development of luminescent glass-ceramics by using Eu3+ dopant in a borate glass matrix with calcium tungstate, which was expected to have a combined character of glass and ceramics. This study revealed that single-phase precipitation of CaWO4 crystals in borate glass matrix was possible by heat-treatment at a temperature higher than glass transition temperature T-g for (100-x) (33CaO-67B(2)O(3))-xCa(3)WO(6) (x = 8-15 mol%). Additionally, the crystallization of CaWO4 was found by Raman spectroscopy due to the formation of W=O double bondings of WO4 tetrahedra in the pristine glass despite starting with the higher calcium content of Ca3WO6. Eu3+ ions were excluded from the CaWO4 crystals and positioned in the borate glass phase as a stable site for them, which provided local environments in higher symmetry around Eu3+ ions.

Authors with CRIS profile

Martin Brehl Lehrstuhl für Glas und Keramik Maria Rita Cicconi Lehrstuhl für Glas und Keramik Dominique de Ligny Professur für Werkstoffwissenschaften (Glas und Keramik)

Additional Organisation(s)

Graduiertenkolleg 2495 Energiekonvertierungssysteme: von Materialien zu Bauteilen (Energy Conversion Systems: From Materials to Devices)

Related research project(s)

Formulation and Crystallization of Perovskite Bearing Glass-Ceramics for Light Management (Project G IGK 2495) IGK 2495: Energy Conversion Systems: From Materials to Devices (IGK 2495) Jan. 1, 2020 - June 30, 2024

Involved external institutions

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku JP Japan (JP)

How to cite

APA:

Otsuka, T., Brehl, M., Cicconi, M.R., de Ligny, D., & Hayakawa, T. (2021). Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions. Materials, 14(4). https://dx.doi.org/10.3390/ma14040952

MLA:

Otsuka, Takahito, et al. "Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions." Materials 14.4 (2021).

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