XU Zhijun 1 , CHENG Renfei 1 , CHU Ruiqing 1 , HAO Jigong 2 , DU Juan 2
(1. School of Environmental and Materials Engineering, Yantai University, Yantai 264005, Shandong, China; 2. College of Materials
Science and Engineering, Liaocheng University, Liaocheng 252059, Shandong, China)
Abstract: Lead-free piezoelectric ceramics, Bi1/2Na1/2Ti1-x(Mo1/3W1/3)xO3 (abbreviated as BNT-MW-100x), were fabricated by a conventional solid state reaction method. The effects of the doping of Mo and W on the microstructure and electric properties of the ceramics were investigated. The results showed that the BNT-based ceramics with Mo and W doping did not change in the crystal structure but still exhibited a pure perovskite phase with a dense structure. They had the maximum values at x=0.9%, where the Bi1/2Na1/2Ti1-x(Mo1/3W1/3)xO3 ceramics exhibited the highest piezoelectric constant of d33=108pC/N, together with the largest planar electromechanical coupling factor of 0.153.
Key words: sodium-bismuth, titanate, lead-free piezoceramics, piezoelectric properties, dielectric properties