Piezoelectric properties of Nb2O5doped and MnO2—Nb2O5co-doped Pb(Zr0.53Ti0.47)O3ceramics

✍ Scribed by Jae-Hwan Park; Byung-Kook Kim; Kug-Hyun Song; Soon Ja Park

• Publisher: Springer US
• Year: 1995
• Tongue: English
• Weight: 927 KB
• Volume: 6
• Category: Article
• ISSN: 0957-4522
• DOI: 10.1007/bf00188191

✦ Synopsis

The effects of Nb205 addition and MnO2-Nb20~ co-addition on the piezoelectric properties of Pb(Zro.~3Tio.47)O3 (PZT) ceramics are investigated. When Nb205 is added to PZT, the planar coupling factor (Kp) significantly increases but the mechanical quality factor (QM) as well as the electrical quality factor (QE) decreases. When MnO2 and Nb205 are co-doped, QM increases remarkably while Kp rarely changes. This increase in QM is ascribed to the domain pinning by Mn as is the case of previously reported MnO2-doped PZT, and the negligible change in Kp is ascribed to the barely changed tetragonality. Even though MnO2-Nb20~ co-doped PZT shows a smaller induced strain than that of Nb2Os doped PZT, excellent temperature stability is obtained. It is shown that MnO2-Nb20~ co-doped PZT may be a very suitable material for high-power piezoelectric actuators because of its high Kp, OM and QE, its low dielectric constant and its excellent temperature stability.