Bi0.5 （Na0.7 K0.2 Li0. 1 ）0.5 TiO3多孔压电陶瓷的制备和性能的研究

摘要

A porous lead-free ceramic was prepared with amylaceum for the porous agent. The influence of Bulk porosity to the porous lead-free ceramic by different mass fraction porogens was researched. The microstructure and shape were studied by x-ray diffraction, scanning electron microscope and the dielectric properties were measured by digital electron instruments. The X-ray diffraction patterns revealed that all ceramics investigated can form a pure perovskite phase at the different mass fuaction porogens addition. The bulk porosity of porous BNKLT ceramics was higher with more amylaceum,but the piezoelectric properties and dielectric properties sharply decreased.%以葡萄糖为造孔剂制备了新型的Bi0.5 （Na0.7 K0.2 Li0. 1 ）0.5 TiO3无铅多孔压电陶瓷．研究了造孔剂含量对该多孔陶瓷的孔隙率的影响，并利用XRD，SEM等测试技术表征了该多孔陶瓷晶体结构、表面形貌和介电压电性能．研究结果表明，在所研究的加入造孔剂范围内，多孔陶瓷形成纯的钙钛矿固溶体，其孔隙率随葡萄糖加入量的增加而增加，最高达40．5％，而压电性能和介电性能急剧降低．