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Successive phase transformation in stoichiometric glassy Li2Ge4O9: Isothermal and nonisothermal study
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10.1063/1.4813783
/content/aip/journal/jap/114/3/10.1063/1.4813783
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/3/10.1063/1.4813783
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Figures

Image of FIG. 1.
FIG. 1.

Crystallization features in stoichiometric glassy LiGeO: (a) DTA curve of the as-quenched sample. The measurement was performed at a heating rate of 10 K/min. (b) Photograph of the glassy samples subjected to isothermal heat treatments at 510 °C−590 °C for 1 h.

Image of FIG. 2.
FIG. 2.

Powder XRD patterns of typical isothermal samples. The JCPDS data for the LiGeO phase (#37−1363) is also included.

Image of FIG. 3.
FIG. 3.

FE-TEM images of the glassy samples obtained by isothermal treatments at different temperatures for 1 h. images of the isothermal samples annealed at 510 °C (a), 520 °C (b), 530 °C (c), 540 °C (d), 550 °C (e), and 590 °C (f), together with the corresponding ED patterns are shown. Semicircular diffraction patterns of the GeO and LiGeO phases, which are referred to JCPDS cards 36-1463 and 37-1363, are also included. The selected area electron diffraction pattern of the sample at 530 °C (g) is also displayed, and the diffraction spots were assigned to Miller indices of the stoichiometric phase of LiGeO.

Image of FIG. 4.
FIG. 4.

FE-TEM images of the glassy samples obtained by nonisothermal treatments at a heating rate of 10 K/min; samples , , , and correspond to (a)–(d), respectively. The ED patterns are also included in the corresponding images. The diffraction rings of samples and / were identified as those of GeO and LiGeO phases, respectively, on the basis of the JCPDS data. An extended image for sample (e) is also displayed.

Image of FIG. 5.
FIG. 5.

Raman scattering spectra for the as-quenched glass and the isothermal samples annealed at 520 °C and 530 °C for 1 h.

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/content/aip/journal/jap/114/3/10.1063/1.4813783
2013-07-17
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Successive phase transformation in stoichiometric glassy Li2Ge4O9: Isothermal and nonisothermal study
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/3/10.1063/1.4813783
10.1063/1.4813783
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