Abstract
The full matrix of electro-elastic constants of sillenite-type crystals Bi12TiO20 (BTO) and Bi12SiO20 (BSO) were determined by the resonance method, with d14 and k14 being on the order of 40-48 pC/N and 31%-36%, respectively. In addition, double-rotated orientation dependence of d33 was investigated, with the maximum values of 25-28 pC/N being achieved in ZXtl45°/54°-cut samples. The electrical resistivity of BSO was found to be two orders higher than that of BTO, being on the order of 7 × 105 Ω cm at 500 °C. The temperature dependence of dielectric and piezoelectric properties were investigated. BSO exhibited a high thermal stability in the temperature range of 25-500 °C, while BTO showed a variation of ~3% in the range of 25-350 °C. The high values of d14 and k14, together with the good thermal stability, make BTO and BSO crystals potential candidates for electromechanical applications in medium temperature range.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 141-151 |
| Number of pages | 11 |
| Journal | Crystals |
| Volume | 4 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jun 20 2014 |
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- General Materials Science
- Condensed Matter Physics
- Inorganic Chemistry