Abstract
Micro-Raman and electron nano-probe techniques are used to show that lead zirconatetitanate (PZT) and samarium-doped bismuth titanate undergo local phase transformations during electrical shorting. In PZT dendrite-like shorts of a few microns diameter, produced by extreme bipolar voltage cycling fatigue, are mapped spectroscopically in 1 μ 2 areas and exhibit almost pure regions of α-PbO, β-PbO and rutile TiO2. [Note that β-PbO is not the stable ambient phase.] Similarly, the Sm-doped bismuth titanate converts under large dc voltages from layered-perovskite structure to a pyrochlore-like structure during filamentary electrical breakdown, with the loss of Bi.
Original language | English |
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Pages (from-to) | 197-204 |
Number of pages | 8 |
Journal | Reviews on Advanced Materials Science |
Volume | 10 |
Issue number | 3 |
Publication status | Published - Sept 2005 |
Externally published | Yes |
ASJC Scopus Subject Areas
- General Materials Science
- Condensed Matter Physics