STRUCTURE AND DIELECTRIC PROPERTIES OF LAYERED-STRUCTURE BISMUTH-CONTAINING CERAMICS

摘要

SrBi_3Ti_2NbO_12,PbBi_3Ti_2NbO_12,and BaBi_3Ti_2NbO_12 ceramics were prepared and characterized by x-ray diffraction and dielectric measurements at temperatures of 20-400℃ and frequencies of 1-500 kHz. As the ionic radius increases in the series Sr~2+ ,Pb~2+,and Ba~2+,the maximum in the dielectric permitivity as a function of temperature becomes broader and shifts to higher temperatures.