Dielectric and complex impedance analysis of Sr5Nb4TiO17 ceramic with perovskite-like structure

Li, Chunchun; Wei, Xiaoyong; Fang, Liang

doi:10.1007/s10854-015-3547-5

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Space charges tend to aggregate at grain boundaries, which leads to electrically heterogeneous microstructures characterized by insulating grains and semiconducting grain boundaries. It is well known that impedance spectroscopy is a favorable technique to separate inhomogeneous microstructures by correlating the electrical properties to the microstructures [42][43][44]. Hence, to get a comprehensive understanding of the thermal activated dielectric anomaly, complex impedance analysis was conducted over the temperature range of 530 to 610 o C (the temperature range where dielectric anomaly occurred).…”

Section: Figurementioning

confidence: 99%

Synthesis of LiBGeO4 using compositional design and its dielectric behaviors at RF and microwave frequencies

Xing

Yin

et al. 2020

Ceramics International

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Borates are promising candidates as dielectric substrate materials in low temperature cofired ceramics technology (LTCC) due to their relative low sintering temperatures and relative permittivities compared to their counterparts. However, synthesizing borates having single-phase is still challenging because of the volatility and hydrophilicity of boron resources. In this work, a compositional design was utilized to synthesize single-phase LiBGeO 4 ceramics over a broad temperature range from 600 to 840 o C. Radio-frequency dielectric behaviours featured a strong temperature dependence, especially at high temperatures (> 400 o C), which is related to the thermally activated polarizations. LiBGeO 4 ceramic sintered at 820 o C has optimum microwave dielectric properties with the relative permittivity ( r ) of 6.28, a quality factor (Q×f) of 21,620 GHz, and a temperature coefficient of resonance frequency (τ f ) of -88.7 ppm/ o C. LiBGeO 4 also showed chemical inertness when cofired with silver (Ag), provided an evidence for its utilization in LTCC technology.Overall, this work provides a strategy for facile synthesis of phase pure borates, via the proposed two-step process to obtain stable boron resources.

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Section: Figurementioning

confidence: 99%

Synthesis of LiBGeO4 using compositional design and its dielectric behaviors at RF and microwave frequencies

Xing

Yin

et al. 2020

Ceramics International

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“…These compounds consist of five corner shared octahedral slabs connected with each other. The crystal structure and dielectric properties of layered perovskites has received great attention in the last few years [13]. For example, Zinc-substituted Ca0.2La0.8TiO3.4 possesses εr = 57.6, Q×f = 17,100 GHz, τf = -4.9 ppm/°C [14].…”

Section: Introductionmentioning

confidence: 99%

Phase and microstructural analysis of NdTi0.8M0.2O3.4 (M = Al, Ga) microwave ceramics

Muhammad

Khesro

2019

Matéria (Rio J.)

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In this paper, we report the characterization of NdTi0.8M0.2O3.4 (M = Ga, Al) ceramics prepared via mixed oxide solid state sintering route. X-ray diffraction analysis of the samples revealed the formation of single phase for NdTi 0.8 Ga 0.2 O 3.4 sample while secondary phase was formed in the case of NdTi 0.8 Al 0.2 O 3.4. Microstructural analysis of the sample showed dense packed grains. NdTi0.8M0.2O3.4 with M = Ga and Al exhibited a dielectric constant (r) = 34, quality factor (Q×f) = 9,776 and 10,867 GHz and temperature coefficient of resonance frequency (τf) =-113 and-90 ppm/ o C, respectively. Further work is required on tuning the low τf of the samples for possible applications in the GHz frequency range.

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Dielectric and complex impedance analysis of Sr5Nb4TiO17 ceramic with perovskite-like structure

Cited by 2 publications

References 18 publications

Synthesis of LiBGeO4 using compositional design and its dielectric behaviors at RF and microwave frequencies

Synthesis of LiBGeO4 using compositional design and its dielectric behaviors at RF and microwave frequencies

Phase and microstructural analysis of NdTi0.8M0.2O3.4 (M = Al, Ga) microwave ceramics

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