Crystallization of tungstenbronze-type Ba{sub 2}NaNb{sub 5}O{sub 15} in high-Nb{sub 2}O{sub 5}-content glass: An inelastic light scattering study

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3512909· OSTI ID:21537933

Takahashi, Yoshihiro; Fujie, Nobuhiro; Ihara, Rie; Fujiwara, Takumi ^[1]; Osada, Minoru ^[2]; Masai, Hirokazu ^[3]

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1. Department of Applied Physics, Tohoku University, 6-6-05 Aoba, Aoba-ku, Sendai 980-8579 (Japan)
2. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
3. Division of Materials Chemistry, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

In situ observations of phonon Raman and Boson scattering were performed in high-Nb{sub 2}O{sub 5}-content barium-sodium aluminophosphate glass, which crystallizes tungstenbronze-type Ba{sub 2}NaNb{sub 5}O{sub 15} (BNN), during heating and subsequent cooling processes in order to examine the BNN crystallization dynamics and phase transitions. It is suggested that NbO{sub 6} clusters/cohesive regions are present and are subjected to stress by the surrounding aluminophosphate network prior to crystallization of the BNN phase. Furthermore, in the cooling period, a successive phase transition (4/mmm{yields}4mm{yields}mm2) of the BNN phase was observed in the glass-ceramics, implying the possibility of producing functional glass-ceramics with ferroelastic properties.

• OSTI ID: 21537933
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 108; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CERAMICS
CHALCOGENIDES
COOLING
CRYSTALLIZATION
DIELECTRIC MATERIALS
FERROELECTRIC MATERIALS
GLASS
HEAT TREATMENTS
HEATING
INELASTIC SCATTERING
LIGHT SCATTERING
MATERIALS
NIOBATES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHONONS
QUASI PARTICLES
RAMAN SPECTRA
REFRACTORY METAL COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SPECTRA
STRESSES
TRANSITION ELEMENT COMPOUNDS