A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD OF MANUFACTURING PIEZOELECTRIC CERAMICS, PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, ULTRASONIC MOTOR, OPTICAL APPARATUS, DUST REMOVING DEVICE, IMAGE PICKUP APPARATUS, ULTRASONIC PROBE, ULTRASONIC DIAGNOSTIC APPARATUS, AND ELECTRONIC APPARATUS
Provided are a piezoelectric ceramics which does not contain lead, has small temperature dependence of a piezoelectric constant within an operating temperature range, and has high density, a high mechanical quality factor, a satisfactory piezoelectric constant, and a small surface roughness, and a method of manufacturing the piezoelectric ceramics. The method of manufacturing a piezoelectric ceramics is characterized by including: sintering a compact containing a raw material at 1,000° C. or more to obtain a sintered compact; abrading the sintered compact; and annealing the abraded sintered compact at a temperature of 800° C. or more and less than 1,000° C.
METHOD OF MANUFACTURING PIEZOELECTRIC CERAMICS, PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, ULTRASONIC MOTOR, OPTICAL APPARATUS, DUST REMOVING DEVICE, IMAGE PICKUP APPARATUS, ULTRASONIC PROBE, ULTRASONIC DIAGNOSTIC APPARATUS, AND ELECTRONIC APPARATUS
Provided are a piezoelectric ceramics which does not contain lead, has small temperature dependence of a piezoelectric constant within an operating temperature range, and has high density, a high mechanical quality factor, a satisfactory piezoelectric constant, and a small surface roughness, and a method of manufacturing the piezoelectric ceramics. The method of manufacturing a piezoelectric ceramics is characterized by including: sintering a compact containing a raw material at 1,000° C. or more to obtain a sintered compact; abrading the sintered compact; and annealing the abraded sintered compact at a temperature of 800° C. or more and less than 1,000° C.
METHOD OF MANUFACTURING PIEZOELECTRIC CERAMICS, PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, ULTRASONIC MOTOR, OPTICAL APPARATUS, DUST REMOVING DEVICE, IMAGE PICKUP APPARATUS, ULTRASONIC PROBE, ULTRASONIC DIAGNOSTIC APPARATUS, AND ELECTRONIC APPARATUS
FURUTA TATSUO (author) / MATSUDA TAKANORI (author) / YABUTA HISATO (author) / UEBAYASHI AKIRA (author)
2021-10-21
Patent
Electronic Resource
English
IPC:
H10N
/
A61B
DIAGNOSIS
,
Diagnostik
/
B06B
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
,
Erzeugen oder Übertragen mechanischer Schwingungen allgemein
/
B08B
Reinigen allgemein
,
CLEANING IN GENERAL
/
C04B
Kalk
,
LIME
/
G01H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
,
Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen
/
G02B
Optische Elemente, Systeme oder Geräte
,
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
/
H02N
Elektrische Maschinen, soweit nicht anderweitig vorgesehen
,
ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
/
H04N
PICTORIAL COMMUNICATION, e.g. TELEVISION
,
Bildübertragung, z.B. Fernsehen
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| European Patent Office | 2017