Dielectric properties of a new ceramic system (1 - x)Mg4Nb2O9-xCaTiO3 at microwave frequency

Cheng Liang Huang; Jhih Yong Chen; Chih Chao Liang

doi:10.1016/j.materresbull.2008.10.005

Dielectric properties of a new ceramic system (1 - x)Mg₄Nb₂O₉-xCaTiO₃ at microwave frequency

Cheng Liang Huang, Jhih Yong Chen, Chih Chao Liang

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The microstructures and the microwave dielectric properties of the (1 - x)Mg₄Nb₂O₉-xCaTiO₃ ceramic system were investigated. In order to achieve a temperature-stable material, CaTiO₃ (τ_f ∼ 800 ppm/°C) was chosen as a τ_f compensator and added to Mg₄Nb₂O₉ (τ_f ∼ -70 ppm/°C) to form a two phase system. It was confirmed by the XRD and EDX analysis. By appropriately adjusting the x-value in the (1 - x)Mg₄Nb₂O₉-xCaTiO₃ ceramic system, near-zero τ_f value can be achieved. A new microwave dielectric material, 0.5Mg₄Nb₂O₉-0.5CaTiO₃ applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant ε_r ∼ 24.8, a Q × f value ∼82,000 GHz (measured at 9.1 GHz) and a τ_f value ∼-0.3 ppm/°C.

Original language	English
Pages (from-to)	1111-1115
Number of pages	5
Journal	Materials Research Bulletin
Volume	44
Issue number	5
DOIs	https://doi.org/10.1016/j.materresbull.2008.10.005
Publication status	Published - 2009 May 6

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2008.10.005

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title = "Dielectric properties of a new ceramic system (1 - x)Mg4Nb2O9-xCaTiO3 at microwave frequency",

abstract = "The microstructures and the microwave dielectric properties of the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system were investigated. In order to achieve a temperature-stable material, CaTiO3 (τf ∼ 800 ppm/°C) was chosen as a τf compensator and added to Mg4Nb2O9 (τf ∼ -70 ppm/°C) to form a two phase system. It was confirmed by the XRD and EDX analysis. By appropriately adjusting the x-value in the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system, near-zero τf value can be achieved. A new microwave dielectric material, 0.5Mg4Nb2O9-0.5CaTiO3 applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 24.8, a Q × f value ∼82,000 GHz (measured at 9.1 GHz) and a τf value ∼-0.3 ppm/°C.",

author = "Huang, {Cheng Liang} and Chen, {Jhih Yong} and Liang, {Chih Chao}",

note = "Funding Information: This work was supported by the National Science Council of the Republic of China under grant NSC 96-2221-E-006-117.",

year = "2009",

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doi = "10.1016/j.materresbull.2008.10.005",

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T1 - Dielectric properties of a new ceramic system (1 - x)Mg4Nb2O9-xCaTiO3 at microwave frequency

AU - Huang, Cheng Liang

AU - Chen, Jhih Yong

AU - Liang, Chih Chao

N1 - Funding Information: This work was supported by the National Science Council of the Republic of China under grant NSC 96-2221-E-006-117.

PY - 2009/5/6

Y1 - 2009/5/6

N2 - The microstructures and the microwave dielectric properties of the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system were investigated. In order to achieve a temperature-stable material, CaTiO3 (τf ∼ 800 ppm/°C) was chosen as a τf compensator and added to Mg4Nb2O9 (τf ∼ -70 ppm/°C) to form a two phase system. It was confirmed by the XRD and EDX analysis. By appropriately adjusting the x-value in the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system, near-zero τf value can be achieved. A new microwave dielectric material, 0.5Mg4Nb2O9-0.5CaTiO3 applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 24.8, a Q × f value ∼82,000 GHz (measured at 9.1 GHz) and a τf value ∼-0.3 ppm/°C.

AB - The microstructures and the microwave dielectric properties of the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system were investigated. In order to achieve a temperature-stable material, CaTiO3 (τf ∼ 800 ppm/°C) was chosen as a τf compensator and added to Mg4Nb2O9 (τf ∼ -70 ppm/°C) to form a two phase system. It was confirmed by the XRD and EDX analysis. By appropriately adjusting the x-value in the (1 - x)Mg4Nb2O9-xCaTiO3 ceramic system, near-zero τf value can be achieved. A new microwave dielectric material, 0.5Mg4Nb2O9-0.5CaTiO3 applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 24.8, a Q × f value ∼82,000 GHz (measured at 9.1 GHz) and a τf value ∼-0.3 ppm/°C.

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Dielectric properties of a new ceramic system (1 - x)Mg₄Nb₂O₉-xCaTiO₃ at microwave frequency

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