Accession Number:

ADA429613

Title:

International Center For Actuators And Transducers

Descriptive Note:

Conference paper

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH INST

Personal Author(s):

• Uchino, Kenjl

Report Date:

2003-06-01

Pagination or Media Count:

122.0

Abstract:

1 There are three loss origins in piezoelectrics dielectric, elastic and piezoelectric losses. 180 deg and non-180 deg domain wall motions contribute primarily to the dielectric and elastic losses, respectively. 2 Heat generation occurs in the sample uniformly under an off-resonance mainly due to the intensive dielectric loss, while heat is generated primarily at the vibration nodal points via the intensive elastic loss under a resonance. 3 Doping rare-earth ions into PZT-PbMn,XO3 X Sb, Nb ceramics increases the maximum vibration velocity up to 0.9 ms, which corresponds to one order of magnitude higher energy density than conventionally commercialized piezo-ceramics. 4 To obtain stabilized high vibration velocity, domain wall stabilization via the positive internal bias field rather than local domain wall pinning seems to be essential.

Descriptors:

• *TRANSDUCERS
• *ACTUATORS
• IONS
• SYMPOSIA
• HIGH VELOCITY
• ELASTIC PROPERTIES
• DIELECTRICS
• CERAMIC MATERIALS
• PIEZOELECTRIC MATERIALS
• INTERNATIONAL
• RARE EARTH ELEMENTS

Subject Categories:

• Electrical and Electronic Equipment
• Machinery and Tools
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE