In:
Journal of Applied Physics, AIP Publishing, Vol. 80, No. 8 ( 1996-10-15), p. 4553-4559
Abstract:
In this work, we obtain (Ba0.7Pb0.3)TiO3 materials possessing double critical temperature Tc in resistivity–temperature (ρ–T) behavior by microwave sintering at 1050–1080 °C for 5 min. The cooling-rate control and postannealing processes modify the relative magnitudes of low- and high-Tc resistivity jumps without altering the Tc values. The donor Ed and trap Es levels of those materials are estimated to be Ed≂0.05–0.07 eV and Es≂1.07–1.32 eV. According to experimental results the voltage sensitivity and transient responsivity of the current passing through double-Tc materials are observed to be superior to those of single-Tc materials prepared by the conventional furnace sintering method. Also, the double-Tc characteristics are attributed to the dual phases with a core-shell structure. Moreover, the change in the relative proportion of the two phases accounts for the influence of post-heat treatment processes on the materials’ ρ–T behavior.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
1996
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
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