Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses

doi:https://doi.org/10.1063/1.3010306

Title: Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses

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Abstract

In this study the relations among nonbridging oxygen (NBO), optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses were studied. Samples containing (in mol %) 35.9-57.5 of CaO, 16-27.7 of Al{sub 2}O{sub 3}, 7.9-41.6 of SiO{sub 2}, and 6.5-6.9 of MgO were measured by optical absorption and excitation, luminescence, and Raman spectroscopy. The results showed that when the SiO{sub 2} content was increased, the absorption edge shifted toward lower wavelengths and the bonds between O{sup 2-} ions and cations became more covalent. These observations were confirmed by Raman results that showed a decrease in the number of NBO per silicon tetrahedron as a function of SiO{sub 2} content. The results indicate that the effects of higher NBO concentration are the narrowing of the band gap energy and the delocalization of O{sup 2-} electrons, which facilitates the O{sup 2-} electrons to be trapped by anion vacancies and, consequently, forming color centers. The relationship between color center formation and SiO{sub 2} content was confirmed by optical spectroscopic measurements under UV radiation.

Authors:

Novatski, A; Steimacher, A; Medina, A N; Bento, A C; Baesso, M L ^[1]; Andrade, L H. C.; Lima, S M ^[2]; Guyot, Y; Boulon, G ^[3]

Departamento de Fisica, Universidade Estadual de Maringa, Av. Colombo 5790, 87020-900, Maringa, PR (Brazil)
Grupo de Espectroscopia Optica e Fototermica, Universidade Estadual de Mato Grosso do Sul-UEMS, C. P. 351, CEP 79804-970, Dourados, MS (Brazil)
Laboratoire de Physico-Chimie des Materiaux Luminescents, Universite Claude Bernard Lyon 1, UMR 5620 CNRS, 69622, Villeurbanne (France)

Publication Date:: 2008-11-01

OSTI Identifier:: 21185906

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 104; Journal Issue: 9; Other Information: DOI: 10.1063/1.3010306; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ABSORPTION; ALUMINIUM OXIDES; ALUMINIUM SILICATES; ANIONS; CALCIUM OXIDES; CATIONS; COLOR CENTERS; COVALENCE; CRYSTALS; ELECTRONS; GLASS; MAGNESIUM OXIDES; OPTICAL PROPERTIES; OXYGEN IONS; PHOTOLUMINESCENCE; RAMAN SPECTRA; RAMAN SPECTROSCOPY; SILICON; SILICON OXIDES; ULTRAVIOLET RADIATION

Citation Formats


                    Novatski, A, Steimacher, A, Medina, A N, Bento, A C, Baesso, M L, Andrade, L H. C., Lima, S M, Guyot, Y, and Boulon, G. Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses.  United States: N. p., 2008. 
        Web.  doi:10.1063/1.3010306.

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                    Novatski, A, Steimacher, A, Medina, A N, Bento, A C, Baesso, M L, Andrade, L H. C., Lima, S M, Guyot, Y, & Boulon, G. Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses.  United States.  https://doi.org/10.1063/1.3010306

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                    Novatski, A, Steimacher, A, Medina, A N, Bento, A C, Baesso, M L, Andrade, L H. C., Lima, S M, Guyot, Y, and Boulon, G. Sat .  
        "Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses".  United States.  https://doi.org/10.1063/1.3010306.

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@article{osti_21185906,

  title        = {Relations among nonbridging oxygen, optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses},

  author       = {Novatski, A and Steimacher, A and Medina, A N and Bento, A C and Baesso, M L and Andrade, L H. C. and Lima, S M and Guyot, Y and Boulon, G},

  abstractNote = {In this study the relations among nonbridging oxygen (NBO), optical properties, optical basicity, and color center formation in CaO-MgO aluminosilicate glasses were studied. Samples containing (in mol %) 35.9-57.5 of CaO, 16-27.7 of Al{sub 2}O{sub 3}, 7.9-41.6 of SiO{sub 2}, and 6.5-6.9 of MgO were measured by optical absorption and excitation, luminescence, and Raman spectroscopy. The results showed that when the SiO{sub 2} content was increased, the absorption edge shifted toward lower wavelengths and the bonds between O{sup 2-} ions and cations became more covalent. These observations were confirmed by Raman results that showed a decrease in the number of NBO per silicon tetrahedron as a function of SiO{sub 2} content. The results indicate that the effects of higher NBO concentration are the narrowing of the band gap energy and the delocalization of O{sup 2-} electrons, which facilitates the O{sup 2-} electrons to be trapped by anion vacancies and, consequently, forming color centers. The relationship between color center formation and SiO{sub 2} content was confirmed by optical spectroscopic measurements under UV radiation.},

  doi          = {10.1063/1.3010306},

  url          = {https://www.osti.gov/biblio/21185906},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 9,

  volume       = 104,

  place        = {United States},

  year         = {2008},

  month        = {11}

}

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