Title :
High temperature piezoelectricity of sodium substituted lithium niobate ceramics
Author :
Pardo, L. ; Durán-Martín, P. ; Wolny, W.W. ; Mercurio, J.P. ; Jiménez, B.
Author_Institution :
Inst. de Ciencia de Mater., CSIC, Madrid, Spain
Abstract :
Ceramics of Sodium substituted Lithium Niobate (Li1-xNa xNbO3) were prepared by mixed oxides and sol-gel methods. The phase diagram of the system was studied by HT XRD, calorimetry and dielectric measurements. An automatic iterative procedure was used for the determination of the piezoelectric, elastic and dielectric coefficients from impedance measurements as a function of the temperature. Piezoelectric activity was found up temperatures above 600°C. The effect of Na content on the thermal stability of the piezoelectric properties is discussed
Keywords :
high-temperature effects; lithium compounds; piezoceramics; sodium compounds; 600 C; HT XRD; LiNaNbO3; automatic iterative method; calorimetry; dielectric coefficients; dielectric measurement; elastic coefficients; high temperature piezoelectricity; mixed oxide method; phase diagram; piezoelectric coefficients; sodium substituted lithium niobate ceramic; sol-gel method; thermal stability; Calorimetry; Ceramics; Dielectric measurements; Impedance measurement; Lithium niobate; Niobium compounds; Piezoelectricity; Temperature; Thermal stability; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598175
