采用浆液合成法和加糖热解法分别合成了具有层状结构和正常钙钛矿结构的Na_0.5Bi_0.5TiO_3纳米粉体.两种粉体以不同比例混合烧结成瓷,性能测试表明,当以1:1的比例混合时,陶瓷的烧缩率达到最大值,击穿场强达到最大值,压电常数d_(33)=75×10~(-12) C/N.浆液合成法制备的粉体获得的陶瓷,压电常数达到最大值,d_(33)=88×10~(-12) C/N.加糖热解法制备的粉体获得的陶瓷d_(33)=65×10~(-12) C/N.两种方法制备的粉体及其混合所制备的陶瓷,均得到比较好的压电性能.
Layered structured Na_0.5Bi_0.5TiO_3 particles were synthesized from slurry directly and normal perovskite structured Na_0.5Bi_0.5TiO_3 nanoparticles were synthesized by adding sugar pyrogenation method. BNT ceramics were prepared through the mixtures of the two particlers with different proportions. The results show that when the two powders are mixed in the proportion of 1:1, the shinkage and breakdown voltage of the ceramic both reaches the maximum, and piezoelectric constant d_(33)=75×10~(-12)C/N. Ceramic made from paticles synthesized from slurry have the maximal piezoelectric constant d_(33)=88×10~(-12) C/N while ceramic made from paticles of adding sugar pyrogenation method have d_(33)=65×10~(-12) C/N. All the ceramics made from different proportions of the two particles perform preferable piezoelectric properties.
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