Dielectric properties of Ti4+/Zr4+ modified the SrCeO3-based microwave ceramic systems

Su, Qi; Qu, Jingjing; Liu, Fei; Feng, Ai-lin; Yuan, Changlai; Liu, Xiao; Meng, Liufang; Ding, Guo-An; Su, Mingwei; Chen, Guohua

doi:10.1007/s10854-022-09706-4

Cited by 2 publications

(2 citation statements)

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“…It can be seen that the Sr 2 CeO 4 ceramic sample has a high Q × f value and the same orthotropic structure as the pure SrCeO 3 ceramic; thus, it is expected that the pure SrCeO 3 matrix can be compounded with the Sr 2 CeO 4 system to enhance the Q × f value in the new composite ceramic systems. At the same time, it has been confirmed that the addition of Ti 4+ -ions can indeed regulate the thermal stability of these SrCeO 3 -based and Sr 2 CeO 4 -based ceramic systems [17,18].…”

Section: Introductionmentioning

confidence: 81%

“…In our previous studies, a pure SrCeO 3 ceramic sample sintered at 1350 • C for 4 h could obtain relatively superior microwave dielectric properties: ε r = 48.2, Q × f = 22,160 GHz (at 6.06 GHz) and τ f = −43.6 ppm/ • C [17]. The ε r value of this ceramic is between 40 and 50, which means it belongs to the category of intermediate electric microwave ceramic systems, but there is still a certain gap from the practical range.…”

Section: Introductionmentioning

confidence: 94%

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Phase Structures and Dielectric Properties of (n + 1)SrO − nCeO2 (n = 2) Microwave Ceramic Systems with TiO2 Addition

Liu

et al. 2023

Crystals

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Ti4+-ion-doped (n + 1)SrO − nCeO2 (n = 2) ceramic systems were prepared with the conventional solid-state reaction method, and the effects of the phase structures and compositions, sintering behaviors, microstructures and microwave dielectric properties of these ceramic systems were investigated in detail as a function of TiO2 content. The analytical results of the XRD patterns show that the pure (n + 1)SrO − nCeO2 (n = 2) system is a composite-phase ceramic system with coexisting SrCeO3 and Sr2CeO4 phases (represented as a SrCeO3 + Sr2CeO4 system), which belong to the orthogonal structures of the Pmcn (62) and Pbam (55) space groups, respectively. For the xTiO2-(1 − x) (SrCeO3 + Sr2CeO4) (x = 0.1–0.4) ceramic samples, the secondary phase Sr2TiO4 can also be detected within the range of the investigated components. Meanwhile, the Raman spectroscopy, SEM-EDS, and HRTEM (SAED) analysis results also verified the correctness and consistency of the phase structures and compositions for all the given specimens. In addition, complex impedance spectroscopy was used to detect the conductive behavior of these compound ceramic systems, and the calculation results show that the appropriate addition of Ti4+-ions can make the SrCeO3 + Sr2CeO4 system have better thermal stability. The composition of x = 0.2 multiphase structural ceramic sample sintered at 1330 °C for 4 h has a near zero τf value of ~−4.6 ppm/°C, a moderate εr of ~40.3 and a higher Q × f~44,020 GHz (at 6.56 GHz). The relatively superior-performing ceramics developed in this work are expected to provide a promising microwave dielectric material for communication components.

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 94%