The Preparation and Properties of (Na0.5+xK0.5-2xLix)NbO3 Lead-Free Piezoelectric Ceramics

Autor: Hong Yun Ma, Zhao Hui Huang, Jin Qiu Zhao, Yan Gai Liu, Minghao Fang
Rok vydání: 2014
Předmět:
Zdroj: Key Engineering Materials. :826-829
ISSN: 1662-9795
DOI: 10.4028/www.scientific.net/kem.602-603.826
Popis: In this paper, the KNN powders with Li+ substituted (K0.5Na0.5)+ were prepared by the sol-gel method in order to make powders pure, (Na0.50+xK0.50-2xLix) -NbO3 (x=0, 0.04, 0.06, 0.08) ceramics were prepared by pressureless sintering. The phase composition of powders was determined by XRD. The effects of the Li+ substitution on piezoelectric and ferroelectric properties of ceramics were systematically studied for determining optimal Li+ content. Li+ can significantly increase the piezoelectric constant of ceramic. When Li+ content was 0.04, piezoelectric properties of ceramics were the best, d33=115 pC/N, Pr=6.35 μC/cm2, Ec=14.24 kV/cm.
Databáze: OpenAIRE