公开(公告)号：EP4284150A1

公开(公告)日：2023-11-29

申请号：EP22886473.2

申请日：2022-09-08

申请人： Niterra Co., Ltd.

发明人： HIROSE, Yoshinobu ,  ICHIHASHI, Kentaro ,  KASASHIMA, Takashi ,  YAMAZAKI, Masato

IPC分类号： H10N30/853 ,  C04B35/495 ,  H10N30/06 ,  H10N30/097 ,  H10N30/50 ,  H10N30/87

摘要： A piezoelectric element having a piezoelectric body and an electrode in contact with the piezoelectric body: the piezoelectric body being formed of a lead-free piezoelectric ceramic composition which includes a primary phase formed of an alkali niobate-based perovskite oxide represented by a compositional formula (A1 a M1 b ) c (Nb d1 Mn d2 Ti d3 Zr d4 Hf d5 )O 3+e (wherein element A1 represents at least one species among the alkali metals; element M1 represents at least one species among Ba, Ca, and Sr; the following conditions: 0

公开(公告)号：EP4322233A1

公开(公告)日：2024-02-14

申请号：EP22784649.0

申请日：2022-04-01

申请人： Niterra Co., Ltd.

发明人： HIROSE, Yoshinobu ,  MATSUOKA, Takayuki ,  ICHIHASHI, Kentaro ,  YAMAZAKI, Masato

IPC分类号： H01L41/047 ,  H01L41/187 ,  H01L41/257 ,  H01L41/29 ,  C04B35/495

摘要： An object is to enhance the mechanical quality factor (Qm) of a lead-free piezoelectric ceramic composition. The lead-free piezoelectric ceramic composition contains a main phase containing an alkali niobate/tantalate perovskite oxide, and a subphase containing a spinel compound containing Ti (titanium). The lead-free piezoelectric ceramic composition contains Mn (manganese). The Ti content x is greater than 0 mol% and not greater than 4 mol%. The Ti content x and the Mn content y satisfy the following relational expression (1). x 2 / y ≤ 20.0