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首页> 外文期刊>Journal of the European Ceramic Society >3+ doped CaCu 3Ti 4O 12 ceramics prepared by a polymer pyrolysis solution route]]>
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3+ doped CaCu 3Ti 4O 12 ceramics prepared by a polymer pyrolysis solution route]]>

机译：“> TI 4 O 12 CERMICE通过热解溶液途径制备]]>

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摘要

CaCu3-xCrxTi4O12(x?=?0.00–0.20) ceramics were prepared via a polymer pyrolysis solution route. Their dielectric properties were improved by Cr3+doping resulting in an optimal dielectric constant value of 7156 and a low tanδ?value of 0.092 in a sample with x?=?0.08. This might have resulted from a decrease in oxygen vacancies at grain boundaries. XANES spectra confirmed the presence of Cu+ions in all ceramic samples with a decreasing Cu+/Cu2+ratio due to an increased content of Cr3+ions. All CaCu3-xCrxTi4O12ceramics showed nonlinear characteristic with improvement in both the breakdown field (Eb) and its nonlinear coefficient (α). Interestingly, the highest values of α, ～ 114.4, and that ofEb, ～8455.0?±?123.6?V?cm?1, were obtained in a CaCu3-xCrxTi4O12sample with x?=?0.08. The improvement of dielectric and nonlinear properties suggests that they originate from a reduction of oxygen vacancies at grain boundaries.
机译：通过聚合物热解溶液途径制备CaCu3-Xcrxti4O12（X？= 0.00-0.20.20）陶瓷。 通过Cr3 +掺杂改善了它们的介电性质，导致最佳介电常数为7156和低Tanδ的低Tanδ？在x的样品中为0.092的值0.092。 这可能是由于谷物边界的氧空位减少。 XANES光谱在所有陶瓷样品中确认了Cu +离子的存在，由于Cr3 +离子的含量增加，具有降低的Cu + / Cu2 +的比例。 所有CACU3-XCRXTI4O12Ceramics显示出非线性特性，改善了击穿场（EB）及其非线性系数（α）。 有趣的是，α，〜114.4的最高值，〜8455.0？±123.6？vα1，在CaCu3-xcrxti4o12sample中获得x≤≤0.08。 介电和非线性特性的改善表明它们源自晶界处的氧空位的减少。

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