CAJ | 학술논문

采用熔盐法在K2CO3和Na2CO3的熔盐(K2CO3/Na2CO3=45/55)中800℃并保温2h的条件下制备出了单相、纯钙态矿型结构的Na0.5K0.5NbO3粉体,运用XRD以及SEM技术对所得粉体进行了相组成及显微结构分析.结果表明:随着盐含量的增加,晶体结构从正交相转变为四方相,晶粒大小先增加而后稍微减小,并且获得较好的介电压电性:εT33/ε0(1kHz)=45～264,tgδ=1.5%～2.6%,Tc=402℃,TT-o=202℃,d33=88～98pC/N,Qm=465～574,Kp=29.09%～30.47%,在10kHz频率下,介电损耗有一点改变.NKN将有可能成为用于高频下的无铅压电陶瓷之一.
채용용염법재K2CO3화Na2CO3적용염(K2CO3/Na2CO3=45/55)중800℃병보온2h적조건하제비출료단상、순개태광형결구적Na0.5K0.5NbO3분체,운용XRD이급SEM기술대소득분체진행료상조성급현미결구분석.결과표명:수착염함량적증가,정체결구종정교상전변위사방상,정립대소선증가이후초미감소,병차획득교호적개전압전성:εT33/ε0(1kHz)=45～264,tgδ=1.5%～2.6%,Tc=402℃,TT-o=202℃,d33=88～98pC/N,Qm=465～574,Kp=29.09%～30.47%,재10kHz빈솔하,개전손모유일점개변.NKN장유가능성위용우고빈하적무연압전도자지일.
The (Na0.5K0.5)NbO3 powder with single-phase, pure perovskite was prepared at 800℃ for 2h in molten salt (K2CO3/Na2CO3 =45/55),which was characterized by the X-ray diffraction and SEM technique. It was found that the crystal structure changes from orthorhombic phase to tetragonal phase and grain size increases and then reduces a little with the increasing of salt.Good dielectric and piezoelectric properties can be observed: εT33/ε0 (1kHz) = 45 ～ 264, tgδ= 1.5 % ～ 2.6%, Tc = 402 ℃, TT-o =202℃ ,d33 =88～98pC/N, Qm =465～574, Kp =29.09%～30.47% and in the frequency of 10kHz, the dielectric loss changed a little.