公开(公告)号：US20230399769A1

公开(公告)日：2023-12-14

申请号：US17928604

申请日：2021-12-08

Applicant: CERACOMP CO., LTD.

Inventor： Ho Yong LEE ,  Won Sun BAICK ,  Dong Ho KIM ,  Moon Chan KIM

IPC: C30B29/32 ,  C01G33/00 ,  C08K3/22 ,  H10N30/853 ,  H10N30/097 ,  C30B29/30 ,  C30B1/12

CPC classification number: C30B29/32 ,  C01G33/006 ,  C08K3/22 ,  H10N30/8536 ,  H10N30/097 ,  C30B29/30 ,  C30B1/12 ,  C01P2002/52 ,  C01P2002/34 ,  C01P2006/40 ,  C08K2003/2244 ,  C08K2201/001

Abstract: Provided is a piezoelectric single crystal, a method of manufacturing the piezoelectric single crystal, and piezoelectric and dielectric application components using the piezoelectric single crystal. The piezoelectric single crystal shows that characteristics of the piezoelectric single crystal are maximized through the control of composition concerning ions located at [A] from a perovskite type crystal structure ([A][B]O3), the single crystal of uniform composition can be provided without a composition gradient even in case of complex, chemical composition thanks to a solid phase single crystal growth method, and in particular, the piezoelectric single crystal is provided in a form which causes large resistance to a mechanical impact, and facilitates mechanical processing, so the piezoelectric single crystal can usefully be applied to the piezoelectric application component and the dielectric application component, like ultrasonic transducers, piezoelectric actuators, piezoelectric sensor, dielectric capacitors, using the piezoelectric single crystal pertain.

公开(公告)号：US20230088567A1

公开(公告)日：2023-03-23

申请号：US18071535

申请日：2022-11-29

Applicant: CERACOMP CO., LTD.

Inventor： Ho Yong LEE ,  Won Sun BAICK ,  Dong Ho KIM ,  Moon Chan KIM

IPC: A61H23/02 ,  B06B1/06

Abstract: Provided is an electric field-vibration generating transducer having a piezoelectric material of a high degree of displacement, and a manufacturing method thereof. The electric field-vibration generating transducer lowers the cost of production through miniaturization simultaneously with realizing excellent generating characteristics of the electric field-vibration generating transducer based on high efficiency and low voltage driving because the piezoelectric material of the high degree of displacement (high strain piezoelectrics) having a high piezoelectric constant (d33=1,000 to 6,000 pC/N), a high dielectric constant (K3T=6,000 to 15,000) as well as a low dielectric loss (tan δ

公开(公告)号：US20230329120A1

公开(公告)日：2023-10-12

申请号：US17928608

申请日：2021-12-08

Applicant: CERACOMP CO., LTD.

Inventor： Ho Yong LEE ,  Won Sun BAICK ,  Moon Chan KIM ,  Hyun Taek OH ,  Hyun Jae JOO

IPC: H10N30/853 ,  H10N30/074 ,  H10N30/097

CPC classification number: H10N30/8548 ,  H10N30/074 ,  H10N30/097 ,  H10N30/8561

Abstract: Provided is a piezoelectric single crystal comprising an internal bias electric field, a method of manufacturing the same, and piezoelectric and dielectric application components using the piezoelectric single crystal. The piezoelectric single crystal shows that as a change in each composition of [A] site ions, [B] site ions and [O] site ions from a perovskite type crystal structure ( [A] [B] O3), and oxygen partial-pressure during heat treatment in terms of a manufacturing process are controlled, while maintaining the inherent high dielectric constant and piezoelectric constant, the high internal bias electric field (EI) characteristic essential for the electrical stability of the piezoelectric single crystal is simultaneously satisfied. Therefore, piezoelectric application components and dielectric application components using the piezoelectric single crystal having excellent characteristics can be used in a wide temperature range and operating voltage conditions.