Effect of the calcining temperature and soaking time on the properties of KNLNT ceramics
MA Di-fei, LI Yong-qiang, CHAO Xiao-lian, YANG Zu-pei*
(College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
(K0.46Na0.50Li0.04)(Nb0.85Ta0.15)O3 (KNLNT) lead-free piezoelectric ceramics was successfully prepared by conventional mixed-oxide method. The effect of the calcining temperature and soaking time on the electrical properties and the phase structure were investigated. The results showed that the optimized properties of the ceramics calcined at 850℃ for 9h and sintered at 1135℃ for 2 h were obtained, which were listed as follows: d33=248 pC/N, εr=1130, tan δ=0.019, Kp=0.54，Qm=70， Pr=28.38 μC/cm, Ec=14.31 kV/cm.
KeyWords:
(K0.46Na0.50Li0.04)(Nb0.85Ta0.15)O3(KNLNT); Lead-free piezoelectric ceramics; piezoelectric properties; dielectrical properties; ferroelectric properties
