Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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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 a rhombohedral crystal in a single composition, in which a Curie temperature Tc2 is higher 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 rhombohedral crystal in a single composition, in which a Curie temperature Tc3 is equal to or higher than Tc2, and which is composed of a lead-free-system composite oxide that has a perovskite-type structure and is different from the first component. When a molar ratio of the third component to the sum of the first component and the third component is set as ± and ± × Tc3 + (1 - ±) × Tc1 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 a rhombohedral crystal in a single composition, in which a Curie temperature Tc2 is higher 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 rhombohedral crystal in a single composition, in which a Curie temperature Tc3 is equal to or higher than Tc2, and which is composed of a lead-free-system composite oxide that has a perovskite-type structure and is different from the first component. When a molar ratio of the third component to the sum of the first component and the third component is set as ± and ± × Tc3 + (1 - ±) × Tc1 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 METTANT EN OEUVRE UN ÉLÉMENT PIÉZOÉLECTRIQUE
SUMI KOJI (Autor:in) / KITADA KAZUYA (Autor:in) / SAKAI TOMOHIRO (Autor:in) / HAMADA YASUAKI (Autor:in) / ISSHIKI TETSUYA (Autor:in) / KIMURA SATOSHI (Autor:in) / ITO AKIO (Autor:in) / HANDA TSUNEO (Autor:in)
01.08.2018
Patent
Elektronische Ressource
Englisch
| Europäisches Patentamt | 2016
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