NDLI: The Effects of Ta Substitution and K/Na Ratio Variation on the Microstructure and Properties of (K,Na)NbO$_{3}$-Based Lead Free Piezoelectric Ceramics

Content Provider	Springer Nature Link
Author	Shang, Xunzhong Guo, Jinming Xiao, Wanping Lu, Yinmei Chang, Gang Zhou, Taosheng He, Yunbin
Copyright Year	2014
Abstract	[(Na$_{0.5+y }$K$_{0.5−y }$)$_{0.94}$Li$_{0.06}$][(Nb$_{0.94}$Sb$_{0.06}$)$_{1−x }$Ta$_{ x }$]O$_{3}$ + 0.08 mol% MnO$_{2}$ lead-free piezoelectric ceramics were fabricated successfully by a conventional solid-state reaction method. The effects of Ta$^{5+}$ substitution and K/Na ratio variation on the microstructure and properties of the ceramics have been systematically investigated. With the increasing of Ta$^{5+}$ substitution content, the orthorhombic–tetragonal transition temperature T $_{o–t}$ presents obvious “V” type variation while the Curie temperature T $_{c}$ decreases monotonically. The ceramics properties were further enhanced by adjusting the Na/K ratio of the A-site. Under systematical optimization of the A-site and B-site elements, good overall electrical properties of d $_{33}$ = 276 pC/N, k $_{p}$ = 44.5%, ε 33 T /ε $_{0}$ = 1,175, tanδ = 0.027, T $_{c}$ = 309 °C, P $_{r}$ = 21.0 μC/cm$^{2}$, and E $_{c}$ = 1.14 kV/mm were obtained for ceramics with Ta$^{5+}$ content x of 0.05 and Na/K ratio of 57/43 (y = 0.07).
Starting Page	1424
Ending Page	1431
Page Count	8
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	43
Issue Number	5
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2014-03-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lead-free ceramics (K,Na)NbO$_{3}$-based piezoelectric and dielectric properties Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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