Abstract
The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 1205-1210 |
| Number of pages | 6 |
| Journal | International Journal of Inorganic Materials |
| Volume | 3 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Dec 2001 |
Keywords
- ferroelectric oxides
- electroceramics
- doping mechanisms
- phase transitions
- BARIUM-TITANATE CERAMICS
- DEFECT CHEMISTRY
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