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中文摘要：
采用传统陶瓷工艺制备了锰掺杂0．8（Na0.5Bi0.5）TiO3-0.1BaTiO3-0.1（K0.5Bi0.5）TiO3（BNT-BT-BKT）无铅压电陶瓷材料，研究了材料的介电、压电和铁电性能。发现锰掺杂大幅降低了（Na0.5Bi0.5）TiO3-0.1BaTiO3-0.1（K0.5Bi0.5）TiO3陶瓷的电导率和矫顽场，最佳掺杂量为0．1％（质量分数），该配方的最佳烧结温度为1150℃。这一温度下烧结所得样品在130℃时的电导率仅为1．36×10^-11Ω^-1cm^-1，约为掺杂前的1／40，矫顽场Ec仅为2．78kV／mm，剩余极化强度Pr为38μC／cm^2，压电系数d33达到143pC／N。
英文摘要：
（Na0.5Bi0.5）TiO3-0.1BaTiO3-0.1（K0.5Bi0.5）TiO3（BNT-BT-KBT）ceramics doping with Mn was prepared by conventional technique. Its dielectric, piezoelectric and ferroelectric properties were studied. It is found that manganese doping decreases the electrical conductivity of BNT-BT-KBT efficiently. The optimum quantity of manganese is 0.1wt%, the best sintering temperature of this prescription is 1150℃. Sintered at 1150℃, the electrical conductivity of the specimen decreases to 1.36 × 10^-11Ω^-1cm^-1, only 1/40 of pure BNT-BT-KBT ceramics. The coercive field is 2.78 kV/mm, while the remnant polarization is 38 μC/cm^2 and the piezoelectric constant reaches 143 pC/N.
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