The effective permittivity of two-phase systems

Rushman, D. F.; Strivens, M. A.

doi:10.1088/0959-5309/59/6/312

Cited by 67 publications

(22 citation statements)

References 2 publications

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“…Generally, the dielectric constant decreases with increasing porosity [35]. Using the simplified Wiener equation preferred by Rushman and Strivens [36], the effective dielectric constant is slightly reduced to 9.1 as confirmed by the Maxwell-Garnet theory [37].…”

Section: Debinding and Sinteringmentioning

confidence: 61%

Fabrication of electromagnetic crystals by extrusion freeforming

Lee

Yang

et al. 2008

Metamaterials

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Section: Debinding and Sinteringmentioning

confidence: 61%

Fabrication of electromagnetic crystals by extrusion freeforming

Lee

Yang

et al. 2008

Metamaterials

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“…In the present study, the highest (ε r(exp) ) ∼81 was achieved at 1450°C. The experimental dielectric constants (ε r(exp) ) were corrected for porosity using Rushman and Strivens equation [10] and the highest was to be 87.2 at 1450°C. The Ca substitution for Sr in Sr 2 Ce 2 Ti 5 O 16 ceramics lowers its ε r from 113 to 81.5 due to lower ionic dielectric polarizability of Ca (3.14Å 3 ) than Sr (4.24Å 3 ) in the present study [11].…”

Section: Methodsmentioning

confidence: 99%

Influence of sintering temperature on secondary phases formation and microwave dielectric properties of Ca2Ce2Ti5O16 ceramics

Manan

Khan

Qazi

2014

Materials Science-Poland

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Ca 2 Ce 2 Ti 5 O 16 dielectric ceramics prepared by conventional solid-state ceramic route was investigated. Phase composition and microwave dielectric properties were measured using XRD and Vector network analyzer, respectively. XRD analysis of the calcined and sintered samples revealed the formation of CeO 2 and another unidentified phase (that vanished at 1400°C) as secondary phases along with the parent Ca 2 Ce 2 Ti 5 O 16 phase. The amount of the parent Ca 2 Ce 2 Ti 5 O 16 phase increased with increasing sintering temperature from 1350°C to 1450°C accompanied by a decrease in the apparent density. The density decreased but ε r and Q u f o increased with sintering temperature. An ε r ∼ 81.5, Q u f o ∼ 5915 GHz and τ f ∼ 219 GHz were achieved for the sample sintered at 1450°C.

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“…The relationship between ε r and sintering temperature of Ba 4 CoTi 11 O 27 ceramics presents a trend similar to that of the density since a higher density means a lower porosity for each composition. We can calculate the influence of the relative density on the permittivity (ε r ) using the following equation of RushmanStrivens formula [29]:…”

Section: Atomsmentioning

confidence: 99%