Title :
Doping effect of SiO2/CeO2 on the dielectric, ferroelectric and piezoelectric properties of (Ba0.7Ca0.3)(Zr0.2Ti0.8)O3 ceramics
Author :
Wenfeng Liu ; Daqi Zhao ; Shengtao Li
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
Lead-free (Ba0.7Ca0.3)(Zr0.2Ti0.8)O3 ceramics (BZT-50BCT) with x wt% (x=0,0.05,0.1,0.2,0.4) dopant (SiO2 and CeO2) were prepared by the conventional solid-state reaction from the industry available raw materials. The doping effect of SiO2 and CeO2 with different concentrations on the microstructures and electric properties of BZT-50BCT ceramics was systematically investigated in the present study. Moderate doping level would result in the fine microstructures and the consequent enhanced dielectric, ferroelectric and piezoelectric properties while excessive doping would cause the degradation of the properties. The best piezoelectric performance of d33=476pC/N was achieved by 0.05 wt% CeO2 doping.
Keywords :
barium compounds; calcium compounds; cerium compounds; crystal microstructure; doping profiles; ferroelectric ceramics; piezoceramics; silicon compounds; (Ba0.7Ca0.3)(Zr0.2Ti0.8)O3:CeO2; (Ba0.7Ca0.3)(Zr0.2Ti0.8)O3:SiO2; BZT-50BCT ceramics; conventional solid-state reaction; dielectric properties; doping concentrations; doping effect; electric properties; ferroelectric properties; lead-free ceramics; microstructures; piezoelectric properties; raw materials; Ceramics; Doping; Ions; Lattices; Lead; Microscopy; Nickel; d33; dielectric properties; doping; piezoelectric properties;
Conference_Titel :
Electrical Insulating Materials (ISEIM), Proceedings of 2014 International Symposium on
Conference_Location :
Niigata
DOI :
10.1109/ISEIM.2014.6870819
