【摘 要】
：
ZnO-modified (Li,Na,K)NbO3 lead-free ceramics with a nominal composition of Li0.06(Na0.535K0.48)0.94NbO3+0.7mol％ ZnO (LNKN-Z7) was synthesized normally at 930-10
【机 构】
：
School of Materials Science and Engineering
论文部分内容阅读
ZnO-modified (Li,Na,K)NbO3 lead-free ceramics with a nominal composition of Li0.06(Na0.535K0.48)0.94NbO3+0.7mol％ ZnO (LNKN-Z7) was synthesized normally at 930-1000℃.The Zn ions incorporated into the A-site at a higher sintering temperature,which changed LNKN-Z7 to soft piezoelectric ceramics with the mechanical quality factor decreasing from 228 to 192.A phase transition from tetragonal to orthorhombic symmetry was identified by XRD analysis,and the corresponding calculation of lattice parameters was conducted at 970-980℃.Because of such transitional behavior and fine microstructure,the optimized values of piezoelectric coefficient,planar electromechanical coupling coefficient,and relative dielectric constant were obtained.
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