| 发明名称 | Piezoelectric ceramic, method for making the same, piezoelectric element, liquid discharge head, and ultrasonic motor | ||
| 摘要 | A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 μm or more and 300 μm or less and crystal grains B having an equivalent circular diameter of 0.5 μm or more and 3 μm or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure. | ||
| 申请公布号 | US8846556(B2) | 申请公布日期 | 2014.09.30 |
| 申请号 | US201012952644 | 申请日期 | 2010.11.23 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Kubota Makoto;Furuta Tatsuo;Saito Hiroshi;Ifuku Toshihiro;Takeda Kenichi;Fukui Tetsuro |
| 分类号 | B41J2/045;C04B35/00;H01L41/00;H02N2/00;H01L41/18;H01L41/187;C04B35/468;C04B35/628;H01L41/09;C04B35/626;H02N2/10;H02N2/16 | 主分类号 | B41J2/045 |
| 代理机构 | Canon U.S.A., Inc., IP Division | 代理人 | Canon U.S.A., Inc., IP Division |
| 主权项 | 1. A piezoelectric ceramic comprising: barium titanate; and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate, wherein the piezoelectric ceramic is composed of crystal grains, the crystal grains include crystal grains A having an equivalent circular diameter of 30 μm or more and 300 μm or less and crystal grains B having an equivalent circular diameter of 0.5 μm or more and 3 μm or less, and the crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure. | ||
| 地址 | Tokyo JP | ||