Effect of Li、Ce Doping on NBTa-CBN High-Temperature Piezoelectric Ceramic Properties
A Ca0.5(Na0.5 Bi0.5)0.5-3x(Li0.5 Ce0.5)3xBi2 TaNb0.99 Mn0.01 O9(CNBTNM-LC100x)solid-solution piezo-electric ceramic with high Curie temperature(TC)was prepared using the traditional solid-state reaction method.The effect of Li,Ce composite iondoping on the ceramic structure and electrical properties was studied.The results show that,with increasing Li,Ce doping concentration,the crystal structure of CNBTNM-LC100x ceramics tends to transition from orthogonal to tetragonal,and the piezoelectric constant d33 gradually increases.When the molar fraction x＞0.04,d33 tends to decrease.When x=0.04,the ceramic sample exhibits the best comprehensive per-formance,with d33 ≈15.9 pC/N,and the DC resistivity ρ≈5.9×105 Ω·cmat 600℃.Further,the dielectric loss tan δ(1 MHz)≈7%,and TC ≈887℃.
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