Title :
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
Abstract :
In this study, (K0.5N0.5)0.97(Nb0.97Sb0.03)O3 +0.9 mol% K5.4Cu1.3Ta10O29 + 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 K6Ta10.8O30 was made by the virtue of K2CuNb8O23 addition in the (K0.5N0.5)0.97(Nb0.97Sb0.03)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; (K0.5Na0.5)(Nb0.97Sb0.03)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;
Conference_Titel :
Applications of Ferroelectrics (ISAF), 2010 IEEE International Symposium on the
Conference_Location :
Edinburgh
Print_ISBN :
978-1-4244-8190-3
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2010.5712223
