公开(公告)号：US11889767B2

公开(公告)日：2024-01-30

申请号：US16814804

申请日：2020-03-10

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Gouki Watanabe ,  Ryo Ito ,  Takayuki Goto ,  Hiroyuki Shimizu ,  Sumiaki Kishimoto

IPC: H01L41/187 ,  H10N30/853 ,  C04B35/495 ,  C04B37/00 ,  H10N30/20 ,  H10N30/50 ,  H10N30/053 ,  H10N30/87

CPC classification number: H10N30/8542 ,  C04B35/495 ,  C04B37/001 ,  H10N30/053 ,  H10N30/20 ,  H10N30/50 ,  H10N30/871 ,  H10N30/877 ,  C04B2235/3255 ,  C04B2235/768 ,  C04B2235/786 ,  C04B2237/345

Abstract: A multilayer piezoelectric ceramic is such that: its piezoelectric ceramic layers do not contain lead as a constituent element, and have a perovskite compound expressed by the composition formula LixNayK1-x-yNbO3 (where 0.02

公开(公告)号：US09786833B2

公开(公告)日：2017-10-10

申请号：US14522280

申请日：2014-10-23

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Gouki Watanabe ,  Takayuki Goto ,  Keiichi Hatano ,  Sumiaki Kishimoto ,  Yutaka Doshida

IPC: H01L41/187 ,  H01L41/43 ,  C04B35/493 ,  C04B35/64 ,  H04R17/00 ,  H04R31/00 ,  C04B35/626

CPC classification number: H01L41/1876 ,  C04B35/493 ,  C04B35/6261 ,  C04B35/62645 ,  C04B35/64 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3255 ,  C04B2235/3279 ,  C04B2235/3284 ,  C04B2235/768 ,  C04B2235/786 ,  C04B2235/80 ,  H01L41/43 ,  H04R17/00 ,  H04R31/00 ,  Y10T428/239

Abstract: A piezoelectric ceramic has a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains present sporadically in the primary phase. The piezoelectric ceramic of high kr and high specific dielectric constant can be sintered at low temperature and exhibit minimal characteristics variations.

公开(公告)号：US10418542B2

公开(公告)日：2019-09-17

申请号：US15695993

申请日：2017-09-05

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Gouki Watanabe ,  Takayuki Goto ,  Keiichi Hatano ,  Sumiaki Kishimoto ,  Yutaka Doshida

IPC: H01L41/187 ,  H01L41/43 ,  C04B35/493 ,  C04B35/64 ,  H04R17/00 ,  H04R31/00 ,  C04B35/626

Abstract: A piezoelectric ceramic speaker includes a piezoelectric element using a vibration sheet formed with piezoelectric ceramic having a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains, wherein the primary phase is constituted by ceramic grains expressed by a composition formula Pb {(Zr(1-a)Tia)x·(Ni1/3Nb2/3)y·(Zn1/3Nb2/3)z}O3 (where 0