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Crystallization of tungstenbronze-type in high--content glass: An inelastic light scattering study
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10.1063/1.3512909
/content/aip/journal/jap/108/10/10.1063/1.3512909
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/10/10.1063/1.3512909
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Figures

Image of FIG. 1.
FIG. 1.

(a) Powder XRD patterns of the BNNAP glasses subjected to isothermal heat treatment at different temperatures, , for 1 h, together with crystallographic data on the orthorhombic BNN phase (Ref. 24) and (b) SEM image of a fracture surface of the BNNAP glass treated at .

Image of FIG. 2.
FIG. 2.

In situ measurements of inelastic light scattering spectra in the low-frequency region in BNNAP glass: (a) the spectra in temperature region from RT to during heating period, (b) the variation in their and FWHM as a function of temperature, (c) the spectra in the region of during the heating period, and (d) the spectra during the cooling period (—RT). In (a), solid and dashed curves indicate the results of fitting to the log-normal function and Gaussian curve, respectively. In (b), DTA result of the BNNAP glass at a heating rate of 20 K/min is also included to compare the result with the and FWHM because the in situ measurement was performed in the heating and cooling conditions of 20 K/min. The DTA measurement at the rate of 20 K/min produced the values , , and .

Image of FIG. 3.
FIG. 3.

In situ measurements of inelastic light scattering spectra in the middle- and high-frequency region in BNNAP glass: (a) the spectra in the temperature region from RT to during the heating period, (b) the variation in the relative intensity of the Raman bands as a function of temperature, (c) the spectra in the region of during the heating period, and (d) the spectra during the cooling period. In (b), the F band is not taken into account because of possibility of double contribution of and components.

Image of FIG. 4.
FIG. 4.

Crystal structure of (projection along the -axis). Polyhedron, and spheres in and sites correspond to octahedral unit, and Ba and Na ions, respectively.

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/content/aip/journal/jap/108/10/10.1063/1.3512909
2010-11-29
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Crystallization of tungstenbronze-type Ba2NaNb5O15 in high-Nb2O5-content glass: An inelastic light scattering study
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/10/10.1063/1.3512909
10.1063/1.3512909
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