The Development of High Power Materials with Enhanced Vibrational Velocity and Related Origin Investigation
Abstract
Improved piezoelectric materials with higher vibrational velocities are needed to meet demands of advanced high power electromechanical applications. This paper has reviewed and discussed recent high power materials development, related loss mechanism analysis and possible high power origin investigation. Yb doped Pb(Zr,Ti)O3-Pb(Sb,Mn)O3 has been identified as a novel materials with a significantly enhanced vibration velocity, as compared to the commercial "hard" piezoelectric. Systematic investigations revealed that internal dipolar fields and applied positive DC biases have the same effect. Both stabilize preferred domain structures, lowering the loss factors. Under high drive conditions, internal dipolar field E(sub int) should play an important role in increasing mechanical quality factor Q(sub m), allowing for the obtainment of higher vibrational velocities within specific thermal stability operational criteria, since heat generation under high field is mainly attributed from extensive dielectric loss, which significantly increases with increasing electric field. Enhanced domain stability by E(sub int) may be most important in this regard of lowering the loss factors and raising Q(sub m). Development of materials with enhanced Q(sub m) values and high energy densities have been obtained by rare earth modifications of Pb(Zr,Ti)O3-Pb(Sb,Mn)O3 ceramics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2003
- Accession Number
- ADA429558
Entities
People
- Kenji Uchino
- Yongkang Gao
Organizations
- Pennsylvania State University