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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Dielectric properties of iron doped calcium copper titanate, CaCu_(2.9)Fe_(0.1)Ti_4O_(12)
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Dielectric properties of iron doped calcium copper titanate, CaCu_(2.9)Fe_(0.1)Ti_4O_(12)

机译：铁掺杂钛酸钙铜CaCu_（2.9）Fe_（0.1）Ti_4O_（12）的介电性能

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摘要

CaCu_(2.9)Fe_(0.1)Ti_4O_(12) (CCFTO) has been prepared by a novel semi-wet route and its dielectric properties have been studied in the temperature range 300-500 K. It is found that dielectric constant (s) decreases drastically in the frequency range 100 Hz to 1 MHz. Complex plane impedance and modulus analysis was done to understand this drastic decrease in s. Oxidation state of various ions was studied using X-ray photoelectron spectroscopy (XPS). The decrease in the permittivity of CCFTO can be attributed to two factors: the suppression of the Ca/Cu disorder in CCFTO which is observed in CaCu_3Ti_4O_(12) (CCTO) and the absence of the grain boundary internal barrier layer capacitance mechanism.
机译：通过新颖的半湿法制备了CaCu_（2.9）Fe_（0.1）Ti_4O_（12）（CCFTO），并在300-500 K的温度范围内研究了其介电性能。发现介电常数（s）在100 Hz至1 MHz的频率范围内急剧下降。进行了复杂的平面阻抗和模量分析，以了解s的急剧下降。使用X射线光电子能谱（XPS）研究了各种离子的氧化态。 CCFTO介电常数的降低可归因于两个因素：在CaCu_3Ti_4O_（12）（CCTO）中观察到的CCFTO中的Ca / Cu紊乱的抑制和不存在晶界内部势垒层电容机制。

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