title: BiFeO3-doped (Na0.5K0.5)NbO3lead-free piezoelectric ceramics.
abstract: Lead-free piezoelectric ceramics (1-x)(Na0.5K0.5)NbO3-xBiFeO3(x=0∼0.07) were synthesized by the solid-state reaction. Differential scanning calorimetry (DSC) measurements revealed that an increase in the amount of BiFeO3dopant resulted in a decrease in the orthorhombic-tetragonal and tetragonal-cubic phase transition temperature of the material. One percent BiFeO3additive suppressed grain growth, which not only benefits the sintering of ceramics but also enhances the piezoelectric and ferroelectric properties, whered33=145pC/N,kp=0.31,Qm=80,Pr=11.3 μC cm-2andEc=16.5 kV cm-1. AsxBF>0.01, both piezoelectric and ferroelectric properties decreased rapidly with an increasing amount of dopant.
authors.affiliation: Department of Physical Chemistry, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Xueyi
authors.initials: X
authors.lastname: Sun
authors.affiliation: Department of Physical Chemistry, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Physical Chemistry, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Ranbo
authors.initials: R
authors.lastname: Yu
authors.affiliation: Department of Physical Chemistry, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China; State Key Laboratory for Advanced Metals and Materials, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Xianran
authors.initials: X
authors.lastname: Xing
authors.affiliation: Key Laboratory of Environmental Fracture, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Lijie
authors.initials: L
authors.lastname: Qiao
authors.affiliation: Department of Physical Chemistry, Ministry of Education of China, University of Science and Technology Beijing, Beijing 100 083, People's Republic of China.
authors.forename: Guirong
authors.initials: G
authors.lastname: Liu
keywords: ferroelectrics; lead free; piezoelectrics