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PIEZOELECTRIC MATERIAL AND METHOD FOR PRODUCING SAME, PIEZOELECTRIC ELEMENT, AND DEVICE USING PIEZOELECTRIC ELEMENT
Provided is a piezoelectric material containing: a first component which is a rhombohedral crystal in a single composition, in which a Curie temperature is Tc1, and which is composed of a lead-free-system composite oxide having a perovskite-type structure; a second component which is a crystal other than the rhombohedral crystal in a single composition, in which a Curie temperature Tc2 is lower than Tc1, and which is composed of a lead-free-system composite oxide having a perovskite-type structure; and a third component which is a crystal other than the rhombohedral crystal in a single composition similar to the second component, in which a Curie temperature Tc3 is equal to or higher than Tc1, and which is composed of a lead-free-system composite oxide that has a perovskite-type structure and is different from the second component. When a molar ratio of the third component to the sum of the second component and the third component is set as ± and ± × Tc3 + (1 - ±) × Tc2 is set as Tc4, |Tc4-Tc2| is 50°C or lower.
PIEZOELECTRIC MATERIAL AND METHOD FOR PRODUCING SAME, PIEZOELECTRIC ELEMENT, AND DEVICE USING PIEZOELECTRIC ELEMENT
Provided is a piezoelectric material containing: a first component which is a rhombohedral crystal in a single composition, in which a Curie temperature is Tc1, and which is composed of a lead-free-system composite oxide having a perovskite-type structure; a second component which is a crystal other than the rhombohedral crystal in a single composition, in which a Curie temperature Tc2 is lower than Tc1, and which is composed of a lead-free-system composite oxide having a perovskite-type structure; and a third component which is a crystal other than the rhombohedral crystal in a single composition similar to the second component, in which a Curie temperature Tc3 is equal to or higher than Tc1, and which is composed of a lead-free-system composite oxide that has a perovskite-type structure and is different from the second component. When a molar ratio of the third component to the sum of the second component and the third component is set as ± and ± × Tc3 + (1 - ±) × Tc2 is set as Tc4, |Tc4-Tc2| is 50°C or lower.
PIEZOELECTRIC MATERIAL AND METHOD FOR PRODUCING SAME, PIEZOELECTRIC ELEMENT, AND DEVICE USING PIEZOELECTRIC ELEMENT
PIEZOELEKTRISCHES MATERIAL UND VERFAHREN ZUR HERSTELLUNG DAVON, PIEZOELEKTRISCHES ELEMENT UND VORRICHTUNG MIT PIEZOELEKTRISCHEM ELEMENT
MATÉRIAU PIÉZOÉLECTRIQUE ET SON PROCÉDÉ DE FABRICATION, ÉLÉMENT PIÉZOÉLECTRIQUE, ET DISPOSITIF UTILISANT UN ÉLÉMENT PIÉZOÉLECTRIQUE
SUMI KOJI (author) / KITADA KAZUYA (author) / SAKAI TOMOHIRO (author) / HAMADA YASUAKI (author) / ISSHIKI TETSUYA (author) / KIMURA SATOSHI (author) / ITO AKIO (author) / HANDA TSUNEO (author)
2021-06-23
Patent
Electronic Resource
English
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2018
| European Patent Office | 2018