Affiliation:
1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, P. R. China
2. School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, P. R. China
Abstract
Via the method of cold sintering with post-annealing, the lead-free ceramics [Formula: see text][Formula: see text][Formula: see text]NbO3 were prepared. The cold sintered pellet without post-annealing shows a relative density ([Formula: see text] of 77.9%, which is larger than [Formula: see text] of the green pellet via the conventional solid-state sintering (SSS) method ([Formula: see text]). The cold sintered pellets were post-annealed at temperatures between [Formula: see text]C and [Formula: see text]C. The effect of post-annealing temperatures on microstructure, dielectric, ferroelectric and piezoelectric properties of the ceramics was studied in detail. After being post-annealed, the relative densities and grain sizes of the ceramics were increased. The ceramics post-annealed at [Formula: see text]C show excellent dielectric, ferroelectric and piezoelectric properties. Compared to the conventional SSS method, the method of cold sintering with post-annealing is successful in preparing dense [Formula: see text][Formula: see text][Formula: see text]NbO3 lead-free ceramics in a wide temperature range and at relatively low temperatures.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Excellent Graduate Training Program of Shaanxi Normal University
National College Students Innovation and Entrepreneurship Training Program
Publisher
World Scientific Pub Co Pte Ltd