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

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

Research output: Contribution to journalArticle

24 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 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.

Original languageEnglish
Pages (from-to)3949-3957
Number of pages9
JournalJournal of Solid State Chemistry
Volume179
Issue number12
DOIs
Publication statusPublished - Dec 2006
Externally publishedYes

Fingerprint

Crystallization
crystallization
Glass
glass
electronics
Harmonic generation
polyhedrons
harmonic generations
Optical glass
germanium oxide
Crystals
Alkalinity
Crystal orientation
Raman scattering
crystals
Thermodynamic properties
thermodynamic properties
Raman spectra

Keywords

  • Crystallization
  • Electronic polarizability
  • Glass
  • KTiGeO
  • Raman scattering spectra
  • Second harmonic generation

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Electronic polarizability and crystallization of K2O-TiO2-GeO2 glasses with high TiO2 contents. / Fukushima, T.; Benino, Yasuhiko; Fujiwara, T.; Dimitrov, V.; Komatsu, T.

In: Journal of Solid State Chemistry, Vol. 179, No. 12, 12.2006, p. 3949-3957.

Research output: Contribution to journalArticle

Fukushima, T. ; Benino, Yasuhiko ; Fujiwara, T. ; Dimitrov, V. ; Komatsu, T. / Electronic polarizability and crystallization of K2O-TiO2-GeO2 glasses with high TiO2 contents. In: Journal of Solid State Chemistry. 2006 ; Vol. 179, No. 12. pp. 3949-3957.
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