公开(公告)号：US20230247908A1

公开(公告)日：2023-08-03

申请号：US18007965

申请日：2021-12-08

Applicant: CERACOMP CO., LTD.

Inventor： Ho Yong LEE ,  Won Sun BAICK ,  Dong Ho KIM ,  Hyun Jae JOO

IPC: H10N30/85 ,  H10N30/092 ,  C04B35/488 ,  C04B35/626 ,  C04B35/64

CPC classification number: H10N30/852 ,  H10N30/092 ,  C04B35/488 ,  C04B35/6261 ,  C04B35/64 ,  C04B2235/3249 ,  C04B2235/3206 ,  C04B2235/768 ,  C04B2235/786 ,  C04B2235/783 ,  C04B2235/9607 ,  C04B2235/6567 ,  C04B2235/6562

Abstract: Provided is a piezoelectric single crystal-polycrystal ceramic composite, a method of manufacturing the same, and piezoelectric and dielectric application components using the piezoelectric single crystal-polycrystal ceramic composite. The piezoelectric single crystal-polycrystal ceramic composite shows that complexation is carried out by the optimization of a ratio between grain size distributions of a piezoelectric single crystal and polycrystal ceramic grains, and a volume ratio of the contained piezoelectric single crystal so that mass production simultaneously with excellent piezoelectric characteristics of the piezoelectric single crystal can be realized, and the cost of production can be reduced, so the piezoelectric single crystal-polycrystal ceramic composite can be applied to piezoelectric and dielectric application components, like ultrasonic transducers, piezoelectric actuators, piezoelectric sensors, dielectric capacitors, electric field-generating transducers, and electric field and vibration-generating transducers, using the piezoelectric single crystal-polycrystal ceramic composite, and the piezoelectric single crystal-polycrystal ceramic composite can enhance piezoelectric characteristics and competitiveness in prices.

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.