Properties of neodymium-doped Ca0.15Sr1.85Bi4Ti5O18 ferroelectric ceramics
Properties of neodymium-doped Ca0.15Sr1.85Bi4Ti5O18 ferroelectric ceramics
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DOI：
10.1007/s10854-011-0362-5
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
S. Fan;Fengqing Zhang;Guihong Liu;Qingbo Tian;Luyi Zhu
中科院分区：
文献类型：
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作者：
S. Fan;Fengqing Zhang;Guihong Liu;Qingbo Tian;Luyi Zhu
采用固相反应法制备了铋层状化合物Ca0.15Sr1.85Bi4−xNdxTi5O18（CSBNT, x = 0-0.25）铁电陶瓷样品。研究了Nd3+掺杂对其铁电性能和介电性能的影响。随着Nd3+掺杂量的增加，CSBNT陶瓷的残余极化Pr先增大后减小，在强压场Ec = 80.2 kV/cm时测得最大Pr值为9.6 μC/cm2at x = 0.05。掺Nd3+不仅使居里温度线性降低，而且使介电常数（εr）和介电损耗正切（tan δ）线性降低。在100khz频率下，ε和tan δ在室温下分别为164和0.0083。
Bismuth-layered compound Ca0.15Sr1.85Bi4−xNdxTi5O18(CSBNT, x = 0–0.25) ferroelectric ceramics samples were prepared by solid-state reaction method. The effects of Nd3+doping on their ferroelectric and dielectric properties were investigated. The remnant polarization Pr of CSBNT ceramics increases at beginning then decreases with increasing of Nd3+doping level, and a maximum Pr value of 9.6 μC/cm2at x = 0.05 was detected with a coercive field Ec = 80.2 kV/cm. Nd3+dopant not only decreases the Curie temperature linearly, but also the dielectric constant (εr) and dielectric loss tangent (tan δ). The magnitudes of εrand tan δ at the frequency of 100 kHz are estimated to be 164 and 0.0083 at room temperature, respectively.