Trs Technologies, Inc.

Other

The Penn State Research Foundation

General Electric Company

United States of America As Represented by the Administrator of Nasa

Georgia Tech Research Corporation

Scimed Life Systems, Inc.

National Institute of Aerospace Associates

Wesley S Hackenberger

Jun Luo

Kevin A Snook

Thomas R Shrout

Shujun Zhang

Xiaoning Jiang

Fei Li

Seongtae Kwon

Raffi Sahul

Paul W Rehrig

Edward F Alberta

Venkat Subramaniam Venkataramani

Ji Su

Robert F Speyer

Yu Teng Liang

Wen-Yi Lin

Joseph P Dougherty

Tian-Bing Xu

Richard Romley

Sei-Joo Jang

Jian R Yuan

Richard J Meyer, Jr

Nevin P Sherlock

Paul William Rehrig

Tom R Shrout

MingFang Song

Beth Jones

Steven Perini

A relaxor-PT based piezoelectric crystal is disclosed, comprising the general formula of (PbM){[(M,M)(M,M)]Ti}O, wherein: M is a rare earth cation; Mis selected from the group consisting of Mg, Zn, Yb, Sc, and In; Mis Nb; Mis selected from the group consisting of Mg, Zn, Yb, Sc, In, and Zr; Mis Nbor Zr; 0&#x3c;x&#x2264;0.05; 0.02&#x3c;y&#x3c;0.7; and 0&#x2264;z&#x2264;1, provided that if either Mor Mis Zr, both Mand Mare Zr. A method for forming the relaxor-PT based piezoelectric crystal is disclosed, comprising pre-synthesizing precursor materials by calcining mixed oxides, mixing the precursor materials with single oxides and calcining to form a feeding material, and growing the relaxor-PT based piezoelectric crystal having the general formula of (PbM){[(M,M)(M,M)]Ti}Ofrom the feeding material by a Bridgman method.

Polar nanoregions engineered relaxor-PbTiOferroelectric crystals

The application is directed to piezoelectric single crystals having shear piezoelectric coefficients with enhanced temperature and/or electric field stability. These piezoelectric single crystal may be used, among other things, for vibration sensors as well as low frequency, compact sonar transducers with improved and/or enhanced performance.

Temperature and field stable relaxor-PT piezoelectric single crystals

A transducer is disclosed that includes a multiply resonant composite, the composite having a resonator bar of a piezoelectric single crystal configured in a dtransverse length-extensional resonance mode having a crystallographic orientation set such that the thickness axis is in the &#x3c;110&#x3e; family and resonance direction is the &#x3c;001&#x3e; family.

Transverse mode multi-resonant single crystal transducer

A PIN-PMN-PT ferroelectric single crystal and a method of manufacture are disclosed. The PIN-PMN-PT ferroelectric single crystal is oriented and polarized along a single crystallographic direction. The PIN-PMN-PT ferroelectric single crystal ferroelectric has increased remnant polarization.

High polarization energy storage materials using oriented single crystals

A ceramic or single crystal ferroelectric and a method of manufacture are disclosed. The ceramics and single crystals of the present disclosure are located near phase boundaries between ferroelectric and antiferroelectric phases. These ceramics, single crystals, and composite may be used in pulsed power applications.

High energy density shock discharge materials

A ternary single crystal relaxor piezoelectric of PMN-PZ-PT grown from a novel melt using the Vertical Bridgeman method. The ternary single crystals are characterized by a Curie temperature, T, of at least 150&#xb0; C. and a rhombohedral to tetragonal phase transition temperature, T, of at least about 110&#xb0; C. The ternary crystals further exhibit a piezoelectric coefficient, d, in the range of at least about 1200-2000 pC/N.

Method of making ternary piezoelectric crystals

A &#x3c;110&#x3e; domain engineered relaxor-PT single crystals having a dielectric loss of about 0.2%, a high electromechanical coupling factor greater than about 85%, and high mechanical quality factor greater than about 500 is disclosed. In one embodiment, the relaxor-PT material has the general formula, Pb(BB)O&#x2014;Pb(B)O, where Bmay be one ion or combination of Mg, Zn, Ni, Sc, In, Yb, Bmay be one ion or combination of Nb, Ta, W, and Bmay be Tior combination of Tiwith Zrand/or Hf.

Relaxor-PT ferroelectric single crystals

A piezoelectric composite micromachined ultrasound transducer including single and multilayer 1-D and 2-D arrays having through-wafer-vias (TWVs) that significantly decreased electrical impedance per element, and hence the improved electrical impedance matching to T/R electronics and improved signal to noise ratio is disclosed. The TWVs facilitate integrated interconnection in single element transducers (positive and negative contact on the same side) and array transducers (contact pads array for integration with T/R switches and/or pre-amplifier circuits).

Micromachined piezoelectric ultrasound transducer arrays

A ternary single crystal relaxor piezoelectric grown from a novel melt using the Vertical Bridgeman method. The ternary single crystals are characterized by a Curie temperature, T, of at least 150&#xb0; C. and a rhombohedral to tetragonal phase transition temperature, T, of at least about 110&#xb0; C. The ternary crystals further exhibit a piezoelectric coefficient, d, in the range of at least about 1200-2000 pC/N.

A tangentially poled piezoelectric single crystal ring resonator is disclosed. A single crystal material is machined into elements and formed into a ring structure. The single crystal elements have a &#x3c;110&#x3e; poled tangential axis. The elements may also have a &#x3c;211&#x3e;, &#x3c;511&#x3e; or &#x3c;322&#x3e; orientation range in the radial direction. The elements may have a generally wedge shape.

Tangentially poled single crystal ring resonator

An antiferroelectric ceramic material that can be formed into a multilayer capacitor is disclosed. The antiferroelectric ceramic material is selected from the Pb(Sn, Zr, Ti)O3 (PSnZT) composition family.

Antiferroelectric multilayer ceramic capacitor

The present invention generally relates to medical devices, and more particularly to an improved medical imaging device. In one embodiment, an imaging device includes a drive shaft having proximal and distal ends received within the lumen; and an imaging transducer assembly coupled to the distal end of the drive shaft and positioned at the distal portion of the elongate member. The imaging transducer assembly includes one or more imaging transducers formed with a piezoelectric composite plate using photolithography based micromachining.

Growing community of inventors

State College, PA, United States of America

Wesley S Hackenberger