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Piezoelectric ceramic, piezoelectric element, piezoelectric device and piezoelectric ceramic manufacturing method
A piezoelectric ceramic compatibly represents both an excellent piezoelectric constant and an excellent mechanical quality factor. The piezoelectric ceramic contains a metal oxide expressed by general formula (1) shown below and Mn by not less than 0.04 weight parts and not more than 0.36 weight parts relative to 100 weight parts of the metal oxide in terms of metal. The piezoelectric ceramic includes a plurality of first crystal grains having a perovskite structure and a plurality of second crystal grains existing at grain boundaries between the first crystal grains. The second crystal grains contain at least a metal oxide expressed by general formula (2) shown below: (Ba1-xCax)a(Ti1-yZry)O3 (1) where 0.09≰x≰0.30, 0.025≰y≰0.085 and 0.986≰a≰1.020; (Ba1-vCav)b(Ti1-wZrw)cOd (2) where 0≰v≰1, 0≰w≰1, 1≰b≰6, 2≰c≰19, b+2c−1≰d≰b+2c and b
Piezoelectric ceramic, piezoelectric element, piezoelectric device and piezoelectric ceramic manufacturing method
A piezoelectric ceramic compatibly represents both an excellent piezoelectric constant and an excellent mechanical quality factor. The piezoelectric ceramic contains a metal oxide expressed by general formula (1) shown below and Mn by not less than 0.04 weight parts and not more than 0.36 weight parts relative to 100 weight parts of the metal oxide in terms of metal. The piezoelectric ceramic includes a plurality of first crystal grains having a perovskite structure and a plurality of second crystal grains existing at grain boundaries between the first crystal grains. The second crystal grains contain at least a metal oxide expressed by general formula (2) shown below: (Ba1-xCax)a(Ti1-yZry)O3 (1) where 0.09≰x≰0.30, 0.025≰y≰0.085 and 0.986≰a≰1.020; (Ba1-vCav)b(Ti1-wZrw)cOd (2) where 0≰v≰1, 0≰w≰1, 1≰b≰6, 2≰c≰19, b+2c−1≰d≰b+2c and b
Piezoelectric ceramic, piezoelectric element, piezoelectric device and piezoelectric ceramic manufacturing method
SHIMIZU YASUSHI (author) / FURUTA TATSUO (author) / KOYAMA SHINYA (author) / TANAKA HIDENORI (author) / OSHIMA KANAKO (author) / KUBOTA MAKOTO (author) / HAYASHI JUMPEI (author)
2017-04-04
Patent
Electronic Resource
English
IPC:
H01L
Halbleiterbauelemente
,
SEMICONDUCTOR DEVICES
/
B41J
TYPEWRITERS
,
Schreibmaschinen
/
C04B
Kalk
,
LIME
/
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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