NDLI: Crystal structure and piezoelectric properties of KNbO$_{3}$-BiFeO$

Content Provider	Springer Nature Link
Author	Kim, Jeong Seog Choi, Jin Hong Chae, Ki Woong Hong, Seok Bum Cheon, Chae Il
Copyright Year	2012
Abstract	The crystal structure, microstructure, and piezoelectric properties of 1-wt% MnO-doped (1 − x)KNbO$_{3}$-xBiFeO$_{3}$ (x = 0 ∼ 0.05) ceramics were investigated. The crystal structure changed from orthorhombic to pseudo-cubic around x = 0.005 in the (1 − x)KNbO$_{3}$-xBiFeO$_{3}$ ceramics. The addition of BiFeO$_{3}$ to KNbO$_{3}$ reduced the grain size and led to poor densification. The Dielectric constant showed a maximum at x = 0.005 where the crystal structure changed. The KNbO$_{3}$ ceramic had a pinched P-E hysteresis loop. KNbO$_{3}$-BiFeO$_{3}$ ceramics had lower remanent polarizations (P$_{ r }$) than KNbO$_{3}$, probably due to the effect of small grain size. The KNbO$_{3}$ ceramic showed good piezoelectric properties; a planar electromechanical factor (k$_{ p }$) of 0.304, a mechanical quality factor (Q$_{ m }$) of 281, and a piezoelectric constant (d$_{33}$) of 121 pC/N. The KNbO$_{3}$-BiFeO$_{3}$ ceramic, however, had inferior piezoelectric properties compared to KNbO$_{3}$ due to the incomplete poling resulting from the small grain size, low density, and low insulating resistance.
Starting Page	956
Ending Page	960
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	61
Issue Number	6
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2012-09-27
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical, Mathematical and Computational Physics KNbO$_{3}$-BiFeO$_{3}$ Piezoelectric Physics Particle and Nuclear Physics Lead-free
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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