Localized electrical characterization of the giant permittivity effect in CaCu3Ti4O12 ceramics
Localized electrical characterization of the giant permittivity effect in CaCu3Ti4O12 ceramics
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DOI：
10.1063/1.2919095
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发表时间：
2008-05-05
影响因子：
4
通讯作者：
West, Anthony R.
中科院分区：
文献类型：
--
作者：
Fiorenza, Patrick;Lo Nigro, Raffaella;West, Anthony R.
利用扫描阻抗显微镜对CaCu3Ti4O12陶瓷的电学性能进行了纳米级成像。检测到两种电不均匀性，即，耗尽层在晶界和钛酸钙夹杂物，这两者都是电阻比大部分的晶粒。能量过滤透射电子显微镜被用来估计夹杂物的化学成分。(c)2008年美国物理学会。
Nanoscale imaging of the electrical properties of CaCu3Ti4O12 ceramics has been performed using scanning impedance microscopy. Two kinds of electrical inhomogeneity are detected, namely, depletion layers at grain boundaries and calcium titanate inclusions, both of which are more resistive than the bulk of the grains. Energy filtered transmission electron microscopy was used to estimate the chemical composition of the inclusions. (c) 2008 American Institute of Physics.