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PIEZOELECTRIC PORCELAIN AND PIEZOELECTRIC ELEMENT
A piezoelectric ceramic, which has a large value of coercive electric field and, in addition, which can be fired at low temperatures of 950°C or lower, is provided. A composition is represented by a general formula, Pb x-a-d Bi a M3 d {M1 b (M2 1/3 Nb 2/3 ) y Zr 1-b-y-z Ti z }O 3 (where M1 and M2 represent independently at least one type of Ni and Zn, and M3 represents at least one type of Ba and Sr), wherein regarding a, b, d, x, y, and z in the formula, 0.05 ¤ a ¤ 0.15, 0 < b ¤ 0.075, 0 ¤ (a - 2b), 0 ¤ d ¤ 0.1, 0.97 ¤ x ¤ 1.00, 0.020 ¤ y ¤ 0.250, and 0.398 ¤ z ¤ 0.512 are satisfied. Furthermore, it is preferable that M1 represents Ni, and M2 represents at least one type of Ni and Zn. Moreover, it is preferable that Ni is in the state of being segregated.
PIEZOELECTRIC PORCELAIN AND PIEZOELECTRIC ELEMENT
A piezoelectric ceramic, which has a large value of coercive electric field and, in addition, which can be fired at low temperatures of 950°C or lower, is provided. A composition is represented by a general formula, Pb x-a-d Bi a M3 d {M1 b (M2 1/3 Nb 2/3 ) y Zr 1-b-y-z Ti z }O 3 (where M1 and M2 represent independently at least one type of Ni and Zn, and M3 represents at least one type of Ba and Sr), wherein regarding a, b, d, x, y, and z in the formula, 0.05 ¤ a ¤ 0.15, 0 < b ¤ 0.075, 0 ¤ (a - 2b), 0 ¤ d ¤ 0.1, 0.97 ¤ x ¤ 1.00, 0.020 ¤ y ¤ 0.250, and 0.398 ¤ z ¤ 0.512 are satisfied. Furthermore, it is preferable that M1 represents Ni, and M2 represents at least one type of Ni and Zn. Moreover, it is preferable that Ni is in the state of being segregated.
PIEZOELECTRIC PORCELAIN AND PIEZOELECTRIC ELEMENT
PIEZOELEKTRISCHE KERAMIK UND PIEZOELEKTRISCHES ELEMENT
PORCELAINE PIÉZO-ÉLECTRIQUE ET ÉLÉMENT PIÉZO-ÉLECTRIQUE
SAKAKI CHIHARU (author) / SHIMOMURA EMI (author) / SAKAI MOTOYOSHI (author) / NAKAMURA MOTONORI (author)
2016-09-21
Patent
Electronic Resource
English
LEAD-FREE PIEZOELECTRIC PORCELAIN COMPOSITION AND PIEZOELECTRIC ELEMENT
| European Patent Office | 2022
LEAD-FREE PIEZOELECTRIC PORCELAIN COMPOSITION AND PIEZOELECTRIC ELEMENT
| European Patent Office | 2024