Abstract
PZN (lead zinc niobate) ceramics are of interest due to their high dielectric and piezoelectric coefficients. In particular, materials in the PZN-PT (lead zinc niobate-lead titanate) system have been shown to exhibit extremely high piezoelectric coefficients, which are related to the existence of a morphotropic phase boundary between ferroelectric rhombohedral and tetragonal phases at approximately 12% PT. In the present study, the effect of 5% BT (barium titanate) on the formation of perovskite and pyrochlore phases in PZN-PT compositions close to the MPB was investigated. The phases found on calcination of the mixed oxide powders were determined using XRD and the consequences of using the columbite precursor technique evaluated. It is shown that both the composition and the processing parameters exert a strong influence on the the formation of the perovskite phase.
| Original language | English |
|---|---|
| Pages (from-to) | 651-656 |
| Number of pages | 5 |
| Journal | Materials Science Forum |
| Volume | 228-231 |
| Issue number | 2 |
| Publication status | Published - 1996 |
Keywords
- Ceramic Processing
- Ferroelectric
- Perovskite
- Pyrochlore
- PZN