Title:
圧電磁器組成物及び圧電アクチュエータ
Document Type and Number:
Japanese Patent JP7275251
Kind Code:
B2
Abstract:
In a piezoelectric ceramic composition including potassium sodium niobate, a transition temperature at which a phase transition between an orthorhombic crystal structure and a tetragonal crystal structure occurs lies in a temperature range of -20°C or higher and 60°C or lower. In the piezoelectric ceramic composition, αt/αo is 0.72 or more, where αo represents a coefficient of linear expansion determined when a crystal structure is orthorhombic in the temperature range, and αt represents a coefficient of linear expansion determined when a crystal structure is tetragonal in the temperature range.
Inventors:
Shuhei Tabata
Takeshi Hirayama
Hajime Shimura
Takeshi Hirayama
Hajime Shimura
Application Number:
JP2021504933A
Publication Date:
May 17, 2023
Filing Date:
March 02, 2020
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
C04B35/495; H10N30/20; H10N30/853
Domestic Patent References:
| JP2016219669A | ||||
| JP2005228865A | ||||
| JP2006124271A | ||||
| JP2009290046A |
Foreign References:
| WO2015080256A1 |
Other References:
Jiagang WU et al.,Effects of Ag content on the phase structure and piezoelectric properties of (K0.44-xNa0.52Li0.04Agx)(Nb0.91Ta0.05Sb0.04)O3 lead-free ceramics,Applied Physics Letters,2007年,Vol.91,p.132914-1-132914-3
Attorney, Agent or Firm:
Yasuhiro Iijima