Dielectric and piezoelectric properties of (K0.5Na0.5)(Nb0.97Sb0.03)O3 ceramics according to the K2CuNb8O23 addition

Author

Lee, Shang-Ho ; Lee, Kab-Soo ; Seo, Byeong-Ho ; Yoo, Ju-Hyun ; Park, Durk-Won ; Jeong, Yeong-Ho ; Yoon, Hyun-Sang

Author_Institution

Dept. of Electr. Eng., Semyung Univ., Jecheon, South Korea

fYear

2010

fDate

9-12 Aug. 2010

Firstpage

1

Lastpage

4

Abstract

In this study, (K_0.5N_0.5)_0.97(Nb_0.97Sb_0.03)O₃ +0.9 mol% K_5.4Cu_1.3Ta₁₀O₂₉ + x mol% K₂CuNb₈O₂₃ (x = 0, 0.2, 0.6, 0.8) ceramics were prepared by a conventional mixed oxide method and their microstructure and electric properties were investigated. Secondary phase such as K₆Ta_10.8O₃₀ was made by the virtue of K₂CuNb₈O₂₃ addition in the (K_0.5N_0.5)_0.97(Nb_0.97Sb_0.03)O₃ system ceramics. However, the sinterability of the ceramics increased with increasing K₂CuNb₈O₂₃ content. At the 0.6mol% K₂CuNb₈O₂₃ added composition ceramics sintered at 1060°C, kp and d₃₃ showed the optimum values of 0.39 and 145[pC/N, respectively, suitable for piezoelectric actuator application.

Keywords

copper compounds; crystal microstructure; permittivity; piezoceramics; potassium compounds; sintering; sodium compounds; (K_0.5Na_0.5)(Nb_0.97Sb_0.03)O₃-K₂CuNb₈O₂₃; conventional mixed oxide method; dielectric ceramics; electrical properties; microstructure; piezoelectric actuators; piezoelectric ceramics; secondary phase; sinterability; temperature 1060 degC; Ceramics; Dielectric constant; Haptic interfaces; Lead; Piezoelectric actuators; Powders; Temperature dependence; Electro-mechincal coupling factor(kp); Haptic actuator; Lead-free ceramic; Mechanical quality factor(Qm); NKN;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics (ISAF), 2010 IEEE International Symposium on the

Conference_Location

Edinburgh

ISSN

1099-4734

Print_ISBN

978-1-4244-8190-3

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2010.5712223

Filename

5712223