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PIEZOELECTRIC CERAMICS, MANUFACTURING METHOD FOR PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, VIBRATION DEVICE, AND ELECTRONIC DEVICE
Provided is a piezoelectric ceramics having a gradual change in piezoelectric constant depending on an ambient temperature. Specifically, provided is a single-piece piezoelectric ceramics including as a main component a perovskite-type metal oxide represented by a compositional formula of ABO3, wherein an A site element in the compositional formula contains Ba and M1, the M1 being formed of at least one kind selected from the group consisting of Ca and Bi, wherein a B site element in the compositional formula contains Ti and M2, the M2 being formed of at least one kind selected from the group consisting of Zr, Sn, and Hf, wherein concentrations of the M1 and the M2 change in at least one direction of the piezoelectric ceramics, and wherein increase and decrease directions of concentration changes of the M1 and the M2 are directions opposite to each other.
PIEZOELECTRIC CERAMICS, MANUFACTURING METHOD FOR PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, VIBRATION DEVICE, AND ELECTRONIC DEVICE
Provided is a piezoelectric ceramics having a gradual change in piezoelectric constant depending on an ambient temperature. Specifically, provided is a single-piece piezoelectric ceramics including as a main component a perovskite-type metal oxide represented by a compositional formula of ABO3, wherein an A site element in the compositional formula contains Ba and M1, the M1 being formed of at least one kind selected from the group consisting of Ca and Bi, wherein a B site element in the compositional formula contains Ti and M2, the M2 being formed of at least one kind selected from the group consisting of Zr, Sn, and Hf, wherein concentrations of the M1 and the M2 change in at least one direction of the piezoelectric ceramics, and wherein increase and decrease directions of concentration changes of the M1 and the M2 are directions opposite to each other.
PIEZOELECTRIC CERAMICS, MANUFACTURING METHOD FOR PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, VIBRATION DEVICE, AND ELECTRONIC DEVICE
KUBOTA MAKOTO (author) / SHIMIZU YASUSHI (author) / MATSUDA TAKANORI (author) / FURUTA TATSUO (author) / MIURA KAORU (author) / UEDA MIKI (author) / OSHIMA KANAKO (author)
2019-08-08
Patent
Electronic Resource
English
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