A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PIEZOELECTRIC CERAMICS, AND PIEZOELECTRIC ELEMENT, AND ELECTRONIC EQUIPMENT CONTAINING PIEZOELECTRIC CERAMICS
Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (Qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain. The first crystal grain has an average equivalent circle diameter of 2 μm or more and 30 μm or less. The first crystal grain includes a perovskite-type metal oxide represented by the following general formula (1) as a main component, and the second crystal grain includes a perovskite-type metal oxide represented by the following general formula (2) as a main component: (1) xBaTiO3-yCaTiO3-zCaZrO3; and (2) x′BaTiO3-y′CaTiO3-z′CaZrO3, provided that x, y, z, x′, y′, and z′ satisfy x+y+z=1, x′+y′+z′=1, 0≦x′≦0.15, 0.85≦y′≦1, 0≦z′≦0.05, x>x′, 00.
PIEZOELECTRIC CERAMICS, AND PIEZOELECTRIC ELEMENT, AND ELECTRONIC EQUIPMENT CONTAINING PIEZOELECTRIC CERAMICS
Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (Qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain. The first crystal grain has an average equivalent circle diameter of 2 μm or more and 30 μm or less. The first crystal grain includes a perovskite-type metal oxide represented by the following general formula (1) as a main component, and the second crystal grain includes a perovskite-type metal oxide represented by the following general formula (2) as a main component: (1) xBaTiO3-yCaTiO3-zCaZrO3; and (2) x′BaTiO3-y′CaTiO3-z′CaZrO3, provided that x, y, z, x′, y′, and z′ satisfy x+y+z=1, x′+y′+z′=1, 0≦x′≦0.15, 0.85≦y′≦1, 0≦z′≦0.05, x>x′, 00.
PIEZOELECTRIC CERAMICS, AND PIEZOELECTRIC ELEMENT, AND ELECTRONIC EQUIPMENT CONTAINING PIEZOELECTRIC CERAMICS
SHIMADA MIKIO (author) / AIBA TOSHIAKI (author) / IFUKU TOSHIHIRO (author) / MATSUDA TAKANORI (author) / KUBOTA MAKOTO (author) / FURUTA TATSUO (author) / HAYASHI JUMPEI (author)
2017-04-13
Patent
Electronic Resource
English
PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT AND ELECTRONIC DEVICE
| European Patent Office | 2019
PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPARATUS
| European Patent Office | 2021
PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPARATUS
| European Patent Office | 2019
Piezoelectric ceramics, piezoelectric element, and electronic apparatus
| European Patent Office | 2023
| European Patent Office | 2022