Hewlett-packard Development Company, L.p.

Oregon State University

Xaar Technology Limited

David Cann

Peter Mardilovich

Brady J Gibbons

Eric Andrew Patterson

Troy Ansell

James Elmer Abbot, Jr

Yu Hong Jeon

Parkpoom Jarupoom

Eric A Patterson

Eric Patterson

The present invention relates to a method for identifying a solid solution ceramic material of a plurality of perovskite compounds which exhibits an electric field induced strain derived from a reversible phase transition, as well as a method for making such ceramic materials and ceramic materials obtainable therefrom. In particular, the present invention is directed to a method of identifying a solid solution ceramic material of at least three perovskite compounds which exhibits an electric field induced strain derived from a reversible phase transition; said method comprising the steps of: i) determining a molar ratio of at least one tetragonal perovskite compound to at least one non-tetragonal perovskite compound which, when combined to form a solid solution, provides a ceramic material comprising a major portion of a tetragonal phase having an axial ratio c/a of greater than 1.005 to 1.04; and ii) determining a molar ratio of at least one additional non-tetragonal perovskite compound to the combination of perovskite compounds from step i) at the determined molar ratio which, when combined to form a solid solution, provides a ceramic material comprising a major portion of a pseudo-cubic phase having an axial ratio c/a of from 0.995 to 1.005 and/or a rhombohedral angle of 90&#xb1;0.5 degrees.

Methods of identifying and preparing a ceramic material exhibiting an electric field induced strain

The present invention relates to a bismuth-based solid solution ceramic material, as well as a process for preparing the ceramic material and uses thereof, particularly in an actuator component employed, for example, in a droplet deposition apparatus. In particular, the present invention relates to a ceramic material having a general chemical formula (I): (I): x(BiNa)TiO-y(BiK)TiO-zSrHfO-zSrZrO, wherein x+y+Z+Z=1; y, (z+z)&#x2260;0; x&#x2265;0. In embodiments, the present invention also relates to a ceramic material having a general chemical formula (II): x(Bi0.5Na0.5)TiO3-y(Bi0.5K0.5)TiO3-y(Bi0.5K0.5)TiO3-ZiSrHfO3-z2SrZrO3, wherein x+y+z&#x2212;i+z2=1; x, y, fa+z2)&#x2260;0; as well as a ceramic material of general formula (III): y(BiK)TiO-zSrHfO-zSrZrO, wherein y+z,+z=1; y, (z+z)&#x2260;0.

Ceramic material comprising a pseudo-cubic phase, a process for preparing and uses of the same

The present disclosure is drawn to electrocaloric devices, methods of making electrocaloric integrated circuits, and methods of thermally cycling integrated circuits. The electrocaloric device can include an electrocaloric material having a solid solution of two or more components of BNT, BKT, BZT, BMgT, or BNiT. The electrocaloric material can have an ergodic transition temperature within a range of 50 C to 300 C. The device can also include electrodes associated with the electrocaloric material, as well as an electrical source to add or reduce electrical field between the electrodes across the electrocaloric material to generate heating or cooling relative to the ergodic transition temperature of the electrocaloric material.

Electrocaloric device

A lead-free piezoelectric ceramic material has the general chemical formula xBiCoO3-y(Bi0.5Na0.5)TiO3-z(Bi0.5K0.5)TiO3, xBiCoO3-y(Bi0.5Na0.5)TiO3-zNaN-bO3, xBiCoO3-y(Bi0.5Na0.5)TiO3-zKNbO3, xBiCoO3-yBi(Mg0.5Ti0.5)O3-z(Bi0.5Na0.5)TiO3, xBiCoO3-yBa-TiO3-z(Bi0.5Na0.5)TiO3, or xBiCoO3-yNaNbO3-zKNbO3; wherein x+y+z=1, and x, y, z&#x2260;0.

Lead-free piezoelectric material

A lead-free piezoelectric ceramic material has the general chemical formula xBi(ATi)O-y(BiK)TiO-z(BiNa)TiO, wherein x+y+z=1, x&#x2260;0, and A=Ni or Mg.

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Corvallis, OR, United States of America

David Cann