Piezoelectric material, piezoelectric element, and electronic device

• Main Authors: Murakami Shunsuke, Watanabe Takayuki, Tanaka Hidenori, Furuta Tatsuo, Yabuta Hisato
• Format: Patent
• Language: English
• Published: 01.08.2017
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; GENERATION; HOLOGRAPHY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LIME, MAGNESIA; LINING MACHINES; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; REFRACTORIES; SELECTIVE PRINTING MECHANISMS; SLAG; STAMPS; TRANSPORTING; TREATMENT OF NATURAL STONE; TYPEWRITERS

There is provided a piezoelectric material not containing any lead component, having stable piezoelectric characteristics in an operating temperature range, a high mechanical quality factor, and satisfactory piezoelectric characteristics. The piezoelectric material includes a main component containing a perovskite-type metal oxide that can be expressed using the following general formula (1), and subcomponents containing Mn, Li, and Bi. When the metal oxide is 100 parts by weight, the content of Mn on a metal basis is not less than 0.04 parts by weight and is not greater than 0.36 parts by weight, content ± of Li on a metal basis is not less than 0.0013 parts by weight and is not greater than 0.0280 parts by weight, and content ² of Bi on a metal basis is not less than 0.042 parts by weight and is not greater than 0.850 parts by weight €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (Ba 1-x Ca x ) a (Ti 1-y-z Zr y Sn z )O 3 €ƒ€ƒ€ƒ€ƒ€ƒ(1) (in the formula (1), 0.09 ‰¤ x ‰¤ 0.30, 0.074 < y ‰¤ 0.085, 0 ‰¤ z ‰¤ 0.02, and 0.986 ‰¤ a ‰¤ 1.02)