A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND METHOD FOR MANUFACTURING PIEZOELECTRIC CERAMIC
[Object] A piezoelectric ceramic which has small hysteresis in an output charge output from the piezoelectric ceramic when a load is applied. [Solution] A piezoelectric ceramic 20 includes a pair of main surfaces 2a and 2b that are on opposing sides of a base body 21 and parallel to each other and a side surface 4 continuous to edges 3a and 3b of the pair of main surfaces 2a and 2b. The piezoelectric ceramic contains a layered compound that has a composition formula Bi 4 Ti 3 O 12 ·±MTiO 3 where M is at least one selected from Sr and Ba and ± satisfies 0.1 ¤ ± ¤ 1, as a main component. The base body 21 includes an outer region 22 that includes the side surface 4 and adjacent regions 4A and 4B of the pair of main surfaces 2a and 2b and an inner region 24 surrounded by the outer region 22. A full width half maximum W A of a peak in a range where a diffraction angle (2¸) is 22.8° to 23.5° in an X-ray diffraction pattern using a Cu-K± ray on the side surface 4 of the outer region 22 is smaller than a full width half maximum W B of a peak in the range where a diffraction angle (2¸) is 22.8° to 23.5° in the X-ray diffraction pattern using the Cu-K± ray on the main surfaces 2a and 2b of the inner region 24.
PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND METHOD FOR MANUFACTURING PIEZOELECTRIC CERAMIC
[Object] A piezoelectric ceramic which has small hysteresis in an output charge output from the piezoelectric ceramic when a load is applied. [Solution] A piezoelectric ceramic 20 includes a pair of main surfaces 2a and 2b that are on opposing sides of a base body 21 and parallel to each other and a side surface 4 continuous to edges 3a and 3b of the pair of main surfaces 2a and 2b. The piezoelectric ceramic contains a layered compound that has a composition formula Bi 4 Ti 3 O 12 ·±MTiO 3 where M is at least one selected from Sr and Ba and ± satisfies 0.1 ¤ ± ¤ 1, as a main component. The base body 21 includes an outer region 22 that includes the side surface 4 and adjacent regions 4A and 4B of the pair of main surfaces 2a and 2b and an inner region 24 surrounded by the outer region 22. A full width half maximum W A of a peak in a range where a diffraction angle (2¸) is 22.8° to 23.5° in an X-ray diffraction pattern using a Cu-K± ray on the side surface 4 of the outer region 22 is smaller than a full width half maximum W B of a peak in the range where a diffraction angle (2¸) is 22.8° to 23.5° in the X-ray diffraction pattern using the Cu-K± ray on the main surfaces 2a and 2b of the inner region 24.
PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND METHOD FOR MANUFACTURING PIEZOELECTRIC CERAMIC
PIEZOELEKTRISCHE KERAMIK, PIEZOELEKTRISCHES ELEMENT UND VERFAHREN ZUR HERSTELLUNG DER PIEZOELEKTRISCHEN KERAMIK
CÉRAMIQUE PIÉZOÉLECTRIQUE, ÉLÉMENT PIÉZOÉLECTRIQUE, ET PROCÉDÉ DE FABRICATION D'UNE CÉRAMIQUE PIÉZOÉLECTRIQUE
KOMATSU TSUYOSHI (author)
2016-12-28
Patent
Electronic Resource
English
| European Patent Office | 2017
Method for manufacturing piezoelectric ceramic, piezoelectric ceramic, and piezoelectric element
| European Patent Office | 2015
| European Patent Office | 2017
| European Patent Office | 2017
| European Patent Office | 2024