CAJ | 학술논문

用固相反应法制备了[(NaBi)1-x (LiCe)x ]0.5 Bi2 Nb2 O9(x=0.00,0.04,0.06和0.08)高温铋层压电陶瓷材料,分析了 LiCe 对 Na0.5 Bi2.5 Nb2 O9压电陶瓷的影响。LiCe 掺杂促进了样品晶粒生长,引起样品晶格畸变,这极大地提高了该系列陶瓷样品的压电活性。LiCe掺杂还提高了掺杂样品压电、介电性能的温度稳定性。当x=0.06时,该系列陶瓷的压电常数提高到24 pC/N,是纯 Na0.5 Bi2.5 Nb2 O9的2倍多,平面机电耦合系数为12%,厚度机电耦合系数为25%,加上高的居里温度,低的介电损耗(1 kHz只有0.26%)和稳定的压电特性,表明 LiCe 改性使 Na0.5 Bi2.5 Nb2 O9高温铋层压电陶瓷具有很好的高温应用前景。
용고상반응법제비료[(NaBi)1-x (LiCe)x ]0.5 Bi2 Nb2 O9(x=0.00,0.04,0.06화0.08)고온필층압전도자재료,분석료 LiCe 대 Na0.5 Bi2.5 Nb2 O9압전도자적영향。LiCe 참잡촉진료양품정립생장,인기양품정격기변,저겁대지제고료해계렬도자양품적압전활성。LiCe참잡환제고료참잡양품압전、개전성능적온도은정성。당x=0.06시,해계렬도자적압전상수제고도24 pC/N,시순 Na0.5 Bi2.5 Nb2 O9적2배다,평면궤전우합계수위12%,후도궤전우합계수위25%,가상고적거리온도,저적개전손모(1 kHz지유0.26%)화은정적압전특성,표명 LiCe 개성사 Na0.5 Bi2.5 Nb2 O9고온필층압전도자구유흔호적고온응용전경。
In this paper,high temperature bismuth layer-structured piezoelectric ceramics [(NaBi )1-x (LiCe)x]0.5Bi2Nb2O9(x=0.00,0.04,0.06,0.08)was prepared by the solid-state reaction,and the effect of (LiCe)doping on the properties of Na0.5 Bi2.5 Nb2 O9-based ceramics was investigated.The (LiCe)modification accelerates the growth of grains,and causes the lattice distortion which greatly improves the piezoelectric activi-ty of the samples.the temperature stability of the piezoelectric and dielectric properties of Na0.5 Bi2.5 Nb2 O9-based ceramics was also improved by the (LiCe)modification.The d33 of x=0.06 was found to be 24 pC/N, the highest value among the Na0.5 Bi2.5 Nb2 O9-based ceramics and more than 2 times as much as the d33 values of the pure Na0.5 Bi2.5 Nb2 O9 ceramics. The planar coupling factor kp , thickness coupling factor kt of Na0.5Bi2.5Nb2O9 ceramic were found to be 12%,25%,respectively,together with the high Tc,low dielectric loss(only 0.26% at 1 kHz)and stable piezoelectric properties,demonstrating that the (LiCe)modified Na0.5 Bi2.5 Nb2 O9-based material a wonderful candidate for high temperature applications.