Abstract
Oxygen deficiencies in vacuum hot-pressed ferroelectric ceramics were studied using thermogravimetric increase and electrical resistivity. The oxygen increase was found in terms of the relative mass increase of oxygen-deficient sheet samples after being annealed for sufficient times with respect to the oxygen stoichiometric reference samples. It was found that for one PLZT composition the mass increase reaches the same saturation level independent of annealing temperatures. In addition, thinner samples reach to a fully oxidized sate more rapidly than thicker samples. Electrical resistivity measurements on the samples subjected to various heat treatments confirmed that a full oxidized state was achieved. The quantitative calculation of oxygen deficiency was made based on the net increase in the relative mass changes after being fully oxidized. Measurements on two PLZT compositions showed the oxygen deficiency (z) of about 0.095-0.112.
| Original language | English |
|---|---|
| Pages (from-to) | 319-329 |
| Number of pages | 11 |
| Journal | Integrated Ferroelectrics |
| Volume | 25 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 1999 |
| Externally published | Yes |
Keywords
- Ferroelectric targets
- Oxidation
- Oxygen vacancies
- Thermogravimetric method