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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Low dielectric loss and enhanced tunable properties of Cr-doped barium strontium titanate solid solution
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Low dielectric loss and enhanced tunable properties of Cr-doped barium strontium titanate solid solution

机译：铬掺杂钛酸锶锶钡固溶体的低介电损耗和可调性

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摘要

The dielectric response and tunable properties of Cr-doped Ba0.6Sr0.4TiO3 solid solution were investigated. The XRD patterns revealed that all of the doped specimens are cubic perovskite phase, and the SEM micrographs showed that the grain size increases with the increase of Cr content below 0.6 mol%. The dielectric frequency spectra of the doped BST solid solution showed that an additional relaxation of the doped specimens is observed at frequencies above 10 MHz. Both of the tunability and dissipation factor were improved by doping with Cr concentration lower than 1.0 mol% compared with undoped material. The 0.6 mol% Cr-doped specimen reveals a maximum tunability and figure of merit of 23.3% and 518.3, respectively. Extremely low dissipation factor in order of 5 x 10(-4) is found for 0.4 - 0.6 mol% Cr-doped BST solid solution. The dramatically low dissipation factor of the specimen is explained by the reducing of Cr3+ to Cr2+ and the acceptor action of Cr3+ and Cr2+ which neutralized the donor action of oxygen vacancies.
机译：研究了Cr掺杂的Ba0.6Sr0.4TiO3固溶体的介电响应和可调性能。 XRD图谱表明，所有掺杂样品均为立方晶钙钛矿相，SEM照片表明，随着Cr含量在0.6mol％以下，晶粒尺寸增大。掺杂的BST固溶体的介电频谱表明，在高于10 MHz的频率下，观察到了掺杂样品的其他弛豫。与未掺杂材料相比，通过掺杂Cr浓度低于1.0 mol％可以改善可调谐性和耗散因子。 0.6摩尔％的Cr掺杂样品最大可调性和品质因数分别为23.3％和518.3。对于0.4-0.6 mol％的Cr掺杂BST固溶体，发现其极低的耗散因数约为5 x 10（-4）。样品极低的耗散因数可通过Cr3 +还原为Cr2 +以及Cr3 +和Cr2 +的受主作用来中和氧空位的施主作用来解释。

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