Enhancement of dielectric and piezoelectric properties of M0.5Bi4.5Ti4O15 (M = Na, K, Li) ceramics by Ce doping
Enhancement of dielectric and piezoelectric properties of M0.5Bi4.5Ti4O15 (M = Na, K, Li) ceramics by Ce doping
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DOI：
10.1016/j.scriptamat.2007.07.015
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发表时间：
2007-11
影响因子：
6
通讯作者：
Chun‐Ming Wang;Jin‐feng Wang;Z. Gai
中科院分区：
文献类型：
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作者：
Chun‐Ming Wang;Jin‐feng Wang;Z. Gai
本文报道了CeO2改性的[（Na_（0.5）K_（0.5））Li_（0.06）]_（0.5）Bi_（4.5）Ti_4O_（15）（MBT）多晶陶瓷的介电和压电性能的增强。Ce改性显著提高了MBT陶瓷的压电活性，降低了介电损耗。压电系数d33为0.50wt.% CeO2改性的MBT为28pCN−1，这是报道的普通烧结铋层结构铁电陶瓷的最高值。介电谱显示所有MBT陶瓷的居里温度都高于620°C。
This paper reports the enhanced dielectric and piezoelectric properties in CeO2-modified [(Na0.5K0.5)0.94Li0.06]0.5Bi4.5Ti4O15(MBT) polycrystalline ceramics. The Ce modification greatly improves the piezoelectric activity of MBT ceramics and significantly decreases the dielectric dissipation. The piezoelectric coefficient d33for the 0.50wt.% CeO2-modified MBT is found to be 28pCN−1, the highest value for the reported ordinarily firing bismuth layer-structured ferroelectric ceramics. The dielectric spectroscopy shows that the Curie temperature for all the MBT ceramics is higher than 620°C.