IMASONIC's piezocomposite technology
The concept of a ceramic-polymer piezoelectric composite
structure is found mainly in the forms known as “1-3 connectivity”
and “2-2 connectivity”.
- In 1-3 connectivity, fine ceramic rods are coated with a polymer
binding agent.
- In 2-2 connectivity, fine ceramic blades are coated with a polymer
binding agent.
The properties of the resulting structure are linked
to the properties of the constituent materials and to the geometric
characteristics of the structure itself.
The design of a piezocomposite transducer makes
use of the mechanical, electrical et piezoelectrical properties
of a type 1-3 or 2-2 structure within a stack of passive layers
(non-piezoelectric). This multi-layer structure is then interconnected
and encapsulated to form a complete transducer, also known as a
probe or applicator depending on the field of application.
Imasonic makes use of different forms of the ceramic-polymer
piezoelectric composite structure concept. Many functional and technical
needs can be covered through various applications of this technology:
- Transducers with high electroacoustic efficiency and wide bandwidth
- Annular, linear, matrix array transducers
- Transducers with a geometry allowing focusing, defocusing or
scanning the ultrasound beam
- Flexible transducers
- High power level transducers, pulsed or continuous
- Transducers that are solid, resistant to high usage levels,
mechanical, thermal, chemical, etc.
Papers
"Piezocomposite technology : An innovative approach to the improvement of
N.D.T. performance using ultrasounds", J. Poguet, P. Dumas, G. Fleury –
IMASONIC S.A. ,8th European Conference on Non Destructive Testing, June 2002,
Barcelona, Spain
Download pdf (23kb)
"Improvements of Ultrasonic Inspections through the use of Piezo Composite
Transducers", G.Fleury - IMASONIC S.A., C.Gondard - CEA, 6th European Conference
on Non Destructive Testing, October 1994, Nice France
Download pdf (623kb)
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