掺锰BNBT基压电陶瓷性能研究

Journal of Hubei University(2003)

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Abstract
研究了添加不同剂量锰对(Bi1/2Na1/2)TiO3-BaTiO3(BNBT)二元系的介电、压电性能的影响.发现居里温度随锰掺杂量的增加而明显下降并逐步趋于稳定.当0≤x≤0.3时,介电性能随x的增加明显加强,在x=0.3时介电常数达到1 850;当x>0.3时介电性能降低.压电常数d33、kt 也表现出类似的变化趋势.另外,实验发现在该体系中添加适量Mn,可在较低的极化场强下得到较高的机电耦合系数,表明掺适量锰可以有效降低矫顽场强.
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bnbt ceramics,mn
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