Title :
(Na0.475K0.475Li0.05)(Nb0.92Ta0.05Sb0.03)O3 lead-free ceramics with addition of CeO2
Author :
Lee, T. ; Kwok, K.W. ; Chan, H.L.W.
Author_Institution :
Hong Kong Polytech. Univ., Kowloon
Abstract :
Lead-free piezoelectric ceramics (Na0.475K0.475Li0.05)(Nb0.92Ta0.05Sb0.03)O3 added with different amounts of CeO2 have been prepared by a conventional mixed-oxide method. After the addition of CeO2, the sintering performance of the ceramics is greatly improved. The ceramics can be well-sintered at a higher temperature, and hence have a higher density and better piezoelectric and dielectric properties. For the ceramic added with 0.4 wt% CeO2, the piezoelectric and dielectric properties become optimum, giving d33=246 pC/N, kp=0.50, epsivr=1300 and tandelta=4%.
Keywords :
cerium compounds; density; lithium compounds; niobium compounds; piezoceramics; potassium compounds; sintering; sodium compounds; tantalum compounds; Na0.475K0.475Li0.05Nb0.92Ta0.05Sb0.03O3:CeO2; density; lead free ceramics; mixed oxide method; piezoelectric ceramics; sintering; Ceramics; Dielectric loss measurement; Dielectric measurements; Environmentally friendly manufacturing techniques; Ferroelectric materials; Impedance; Piezoelectric devices; Powders; Titanium compounds; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393364
