 |
DTIC ADA353873: Acoustic Transduction - Materials and Devices, Peri... |
 |
by Defense Technical Information Center |
 |
Thumbnail |
|
Download |
 |
Web page |
|
|
|
In Material Studies, undoubtedly major breakthroughs have |
|
occurred in the ultra- high strain relaxor ferroelectric |
|
systems. Earlier reports of unusual piezoelectric |
|
activity in single crystal perovskite relaxors have been |
|
amply confirmed in the lead zinc niobate : lead titanate, |
|
and lead magnesium niobate : lead titanate systems for |
|
compositions of rhombohedral symmetry close to the |
|
Morphotropic Phase Boundary (MPB) in these solid |
|
solutions. Analysis of the unique properties of 001 field |
|
poled rhombohedral ferroelectric crystals suggests new |
|
intrinsic mechanisms for high strain and carries the |
|
first hints of how to move from lead based compositions. |
|
A major discovery of comparable importance is a new mode |
|
of processing to convert PVDF:TrFE copolymer |
|
piezoelectric into a relaxor ferroelectric in which |
|
electrostrictive strains of 4% have been demonstrated at |
|
high fields. Both single crystal and polymer relaxors |
|
appear to offer energy densities almost order of |
|
magnitude larger than in earlier polycrystal ceramic |
|
actuators. |
|
|
|
Date Published: 2018-04-19 16:30:17 |
|
Identifier: DTIC_ADA353873 |
|
Item Size: 185442179 |
|
Language: english |
|
Media Type: texts |
|
|
|
# Topics |
|
DTIC Archive; Uchino, Kenji; PENNSYLV... |
|
|
|
# Collections |
|
dticarchive |
|
additional_collections |
|
|
|
# Uploaded by |
|
@chris85 |
|
|
|
# Similar Items |
|
View similar items |
|
|
|
PHAROS |
|
