Electronic polarizability and crystallization of K2O-TiO2-GeO2 glasses with high TiO2 contents

T. Fukushima; Y. Benino; T. Fujiwara; V. Dimitrov; T. Komatsu

doi:10.1016/j.jssc.2006.08.035

Electronic polarizability and crystallization of K₂O-TiO₂-GeO₂ glasses with high TiO₂ contents

T. Fukushima, Y. Benino, T. Fujiwara, V. Dimitrov, T. Komatsu

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Some K₂O-TiO₂-GeO₂ glasses with a large amount of TiO₂ contents (15-25 mol%) such as 25K₂O-25TiO₂-50GeO₂ have been prepared, and their electronic polarizability, Raman scattering spectra, and crystallization behavior are examined to clarify thermal properties and structure of the glasses and to develop new nonlinear optical crystallized glasses. It is proposed that the glasses consist of the network of TiO₆ and GeO₄ polyhedra. The glasses show large optical basicities of Λ = 0.88 - 0.92, indicating the high polarizabity of TiO_n (n = 4 - 6) polyhedra in the glasses. K₂TiGe₃O₉ crystals are formed through crystallization in all glasses prepared in the present study. In particular, 20K₂O-20TiO₂-60GeO₂ glass shows bulk crystallization and 18K₂O-18TiO₂-64GeO₂ glass exhibits surface crystallization giving the c-axis orientation. The crystallized glasses show second harmonic generations (SHGs), and it is suggested that the distortion of TiO₆ octahedra in K₂TiGe₃O₉ crystals induces SHGs.

Original language	English
Pages (from-to)	3949-3957
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	179
Issue number	12
DOIs	https://doi.org/10.1016/j.jssc.2006.08.035
Publication status	Published - Dec 1 2006
Externally published	Yes

Keywords

Crystallization
Electronic polarizability
Glass
KTiGeO
Raman scattering spectra
Second harmonic generation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{4a95d35f5e9e4d619cee36140672a467,

title = "Electronic polarizability and crystallization of K2O-TiO2-GeO2 glasses with high TiO2 contents",

abstract = "Some K2O-TiO2-GeO2 glasses with a large amount of TiO2 contents (15-25 mol%) such as 25K2O-25TiO2-50GeO2 have been prepared, and their electronic polarizability, Raman scattering spectra, and crystallization behavior are examined to clarify thermal properties and structure of the glasses and to develop new nonlinear optical crystallized glasses. It is proposed that the glasses consist of the network of TiO6 and GeO4 polyhedra. The glasses show large optical basicities of Λ = 0.88 - 0.92, indicating the high polarizabity of TiOn (n = 4 - 6) polyhedra in the glasses. K2TiGe3O9 crystals are formed through crystallization in all glasses prepared in the present study. In particular, 20K2O-20TiO2-60GeO2 glass shows bulk crystallization and 18K2O-18TiO2-64GeO2 glass exhibits surface crystallization giving the c-axis orientation. The crystallized glasses show second harmonic generations (SHGs), and it is suggested that the distortion of TiO6 octahedra in K2TiGe3O9 crystals induces SHGs.",

keywords = "Crystallization, Electronic polarizability, Glass, KTiGeO, Raman scattering spectra, Second harmonic generation",

author = "T. Fukushima and Y. Benino and T. Fujiwara and V. Dimitrov and T. Komatsu",

year = "2006",

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doi = "10.1016/j.jssc.2006.08.035",

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T1 - Electronic polarizability and crystallization of K2O-TiO2-GeO2 glasses with high TiO2 contents

AU - Fukushima, T.

AU - Benino, Y.

AU - Fujiwara, T.

AU - Dimitrov, V.

AU - Komatsu, T.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - Some K2O-TiO2-GeO2 glasses with a large amount of TiO2 contents (15-25 mol%) such as 25K2O-25TiO2-50GeO2 have been prepared, and their electronic polarizability, Raman scattering spectra, and crystallization behavior are examined to clarify thermal properties and structure of the glasses and to develop new nonlinear optical crystallized glasses. It is proposed that the glasses consist of the network of TiO6 and GeO4 polyhedra. The glasses show large optical basicities of Λ = 0.88 - 0.92, indicating the high polarizabity of TiOn (n = 4 - 6) polyhedra in the glasses. K2TiGe3O9 crystals are formed through crystallization in all glasses prepared in the present study. In particular, 20K2O-20TiO2-60GeO2 glass shows bulk crystallization and 18K2O-18TiO2-64GeO2 glass exhibits surface crystallization giving the c-axis orientation. The crystallized glasses show second harmonic generations (SHGs), and it is suggested that the distortion of TiO6 octahedra in K2TiGe3O9 crystals induces SHGs.

AB - Some K2O-TiO2-GeO2 glasses with a large amount of TiO2 contents (15-25 mol%) such as 25K2O-25TiO2-50GeO2 have been prepared, and their electronic polarizability, Raman scattering spectra, and crystallization behavior are examined to clarify thermal properties and structure of the glasses and to develop new nonlinear optical crystallized glasses. It is proposed that the glasses consist of the network of TiO6 and GeO4 polyhedra. The glasses show large optical basicities of Λ = 0.88 - 0.92, indicating the high polarizabity of TiOn (n = 4 - 6) polyhedra in the glasses. K2TiGe3O9 crystals are formed through crystallization in all glasses prepared in the present study. In particular, 20K2O-20TiO2-60GeO2 glass shows bulk crystallization and 18K2O-18TiO2-64GeO2 glass exhibits surface crystallization giving the c-axis orientation. The crystallized glasses show second harmonic generations (SHGs), and it is suggested that the distortion of TiO6 octahedra in K2TiGe3O9 crystals induces SHGs.

KW - Crystallization

KW - Electronic polarizability

KW - Glass

KW - KTiGeO

KW - Raman scattering spectra

KW - Second harmonic generation

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