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Electrochemically induced crystallization in lead fluoroborate glasses below the glass transition temperature
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10.1063/1.2767196
/content/aip/journal/apl/91/6/10.1063/1.2767196
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/6/10.1063/1.2767196

Figures

Image of FIG. 1.
FIG. 1.

Room temperature XRD patterns of different BP15 glass samples. BPP15A: as-quenched sample; BPP15B: sample treated at for ; BPP15C: sample electrically treated at with a dc voltage for ; BPP15D: sample electrically treated at with a dc voltage, now for .

Image of FIG. 2.
FIG. 2.

Typical impedance dispersions measured on (a) BPP00 and (b) BPP10 glass samples at with a ac voltage.

Image of FIG. 3.
FIG. 3.

Typical impedance dispersions observed especially for (a) BPP10 and (b) BPP15 glass samples after subsequent measurements at with the ac voltage. After a time period of about of electric field applied, a second semicircle appeared at intermediate frequencies, besides the spikelike electrode effect at the lowest ones.

Image of FIG. 4.
FIG. 4.

Morphological aspects of a BPP15 glass sample after remaining subjected to a dc voltage at . Surface crystallization was observed and identified to correspond to a phase formation.

Image of FIG. 5.
FIG. 5.

(a) Resistivity values measured at (using the dc electrometer) for while subjecting a BPP15 sample to a dc voltage (open symbols). (b) Subsequent impedance dispersions measured at with a ac voltage, just after switching off the above dc voltage. In (a), the behavior of the resistivity values corresponding to is also shown (closed symbols). Quantitative difference between the open-symbols curve versus the initial material resistivity (star symbol) at and the closed-symbols curve at especially includes, among other possible effects, the additional electrode contribution for the data with open symbols.

Tables

Generic image for table
Table I.

Glass transition and crystallization temperatures ( and ) extracted from the DSC analysis for all the studied glass compositions.

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/content/aip/journal/apl/91/6/10.1063/1.2767196
2007-08-08
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electrochemically induced crystallization in lead fluoroborate glasses below the glass transition temperature
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/6/10.1063/1.2767196
10.1063/1.2767196
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