通过传统的固相烧结法合成(1-x)(Bi0.5Na0.5)TiO3-x(Bi0.5K0.5)TiO3陶瓷(x选取范围0.135～0.24).先在850 ℃合成原料粉体,然后在1100～1200 ℃下烧结得到陶瓷样品.分析检测该体系陶瓷的结构以及铁电、压电性能.X射线衍射分析结果表明,该二元系准同型相界(MPB)区域位于x=0.165～0.225附近.对这一体系铁电和压电性能进行测试,并对其在准同型相界附近的电学性能发生变化的机理作了讨论.(Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3是一种很有应用前景的无铅压电陶瓷材料,值得进一步的研究和探索.同时,本实验还对密封烧结工艺对无铅压电陶瓷性能的影响作了初步的研究.
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