Dielectric characteristics and sintering behavior of Mg2TiO4-(Ca0.8Sr0.2)TiO3 ceramic system at microwave frequency

Cheng Liang Huang; Jhih Yong Chen; Chang Yang Jiang

doi:10.1016/j.jallcom.2009.07.144

Dielectric characteristics and sintering behavior of Mg₂TiO₄-(Ca_0.8Sr_0.2)TiO₃ ceramic system at microwave frequency

Cheng Liang Huang
, Jhih Yong Chen
, Chang Yang Jiang

Department of Electrical Engineering

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

26 Citations (Scopus)

Abstract

The microstructure and the microwave dielectric properties of (1 - x)Mg₂TiO₄-x(Ca_0.8Sr_0.2)TiO₃ ceramic system prepared by the mixed oxide route have been investigated. The phases of Mg₂TiO₄ and (Ca_0.8Sr_0.2)TiO₃ were co-existed as a two-phase system, which was confirmed by the XRD patterns and the EDX analysis. The microwave dielectric properties of the specimens are strongly related to the sintering temperature and the density. Sintering temperature of pure Mg₂TiO₄ can be lowered by adding (Ca_0.8Sr_0.2)TiO₃. Combination of Mg₂TiO₄ (spinel-structured) and (Ca_0.8Sr_0.2)TiO₃ (perovskite-structured) also leads to a zero τ_f. Consequently, a high Q × f of 90,500 GHz (measured at 9.5 GHz) associated with a ε_r of 18.3 and a τ_f of 0 ppm/°C can be achieved by using 0.91Mg₂TiO₄-0.09(Ca_0.8Sr_0.2)TiO₃ ceramics at 1300 °C for 4 h. It is proposed as a very promising dielectric for microwave applications requiring low dielectric loss.

Original language	English
Pages (from-to)	420-424
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	487
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.07.144
Publication status	Published - 2009 Nov 13

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2009.07.144

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title = "Dielectric characteristics and sintering behavior of Mg2TiO4-(Ca0.8Sr0.2)TiO3 ceramic system at microwave frequency",

abstract = "The microstructure and the microwave dielectric properties of (1 - x)Mg2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system prepared by the mixed oxide route have been investigated. The phases of Mg2TiO4 and (Ca0.8Sr0.2)TiO3 were co-existed as a two-phase system, which was confirmed by the XRD patterns and the EDX analysis. The microwave dielectric properties of the specimens are strongly related to the sintering temperature and the density. Sintering temperature of pure Mg2TiO4 can be lowered by adding (Ca0.8Sr0.2)TiO3. Combination of Mg2TiO4 (spinel-structured) and (Ca0.8Sr0.2)TiO3 (perovskite-structured) also leads to a zero τf. Consequently, a high Q × f of 90,500 GHz (measured at 9.5 GHz) associated with a εr of 18.3 and a τf of 0 ppm/°C can be achieved by using 0.91Mg2TiO4-0.09(Ca0.8Sr0.2)TiO3 ceramics at 1300 °C for 4 h. It is proposed as a very promising dielectric for microwave applications requiring low dielectric loss.",

author = "Huang, \{Cheng Liang\} and Chen, \{Jhih Yong\} and Jiang, \{Chang Yang\}",

note = "Funding Information: This work was supported by the National Science Council of Taiwan under grant NSC 97-2262-E-006-013-MY3 .",

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T1 - Dielectric characteristics and sintering behavior of Mg2TiO4-(Ca0.8Sr0.2)TiO3 ceramic system at microwave frequency

AU - Huang, Cheng Liang

AU - Chen, Jhih Yong

AU - Jiang, Chang Yang

N1 - Funding Information: This work was supported by the National Science Council of Taiwan under grant NSC 97-2262-E-006-013-MY3 .

PY - 2009/11/13

Y1 - 2009/11/13

N2 - The microstructure and the microwave dielectric properties of (1 - x)Mg2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system prepared by the mixed oxide route have been investigated. The phases of Mg2TiO4 and (Ca0.8Sr0.2)TiO3 were co-existed as a two-phase system, which was confirmed by the XRD patterns and the EDX analysis. The microwave dielectric properties of the specimens are strongly related to the sintering temperature and the density. Sintering temperature of pure Mg2TiO4 can be lowered by adding (Ca0.8Sr0.2)TiO3. Combination of Mg2TiO4 (spinel-structured) and (Ca0.8Sr0.2)TiO3 (perovskite-structured) also leads to a zero τf. Consequently, a high Q × f of 90,500 GHz (measured at 9.5 GHz) associated with a εr of 18.3 and a τf of 0 ppm/°C can be achieved by using 0.91Mg2TiO4-0.09(Ca0.8Sr0.2)TiO3 ceramics at 1300 °C for 4 h. It is proposed as a very promising dielectric for microwave applications requiring low dielectric loss.

AB - The microstructure and the microwave dielectric properties of (1 - x)Mg2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system prepared by the mixed oxide route have been investigated. The phases of Mg2TiO4 and (Ca0.8Sr0.2)TiO3 were co-existed as a two-phase system, which was confirmed by the XRD patterns and the EDX analysis. The microwave dielectric properties of the specimens are strongly related to the sintering temperature and the density. Sintering temperature of pure Mg2TiO4 can be lowered by adding (Ca0.8Sr0.2)TiO3. Combination of Mg2TiO4 (spinel-structured) and (Ca0.8Sr0.2)TiO3 (perovskite-structured) also leads to a zero τf. Consequently, a high Q × f of 90,500 GHz (measured at 9.5 GHz) associated with a εr of 18.3 and a τf of 0 ppm/°C can be achieved by using 0.91Mg2TiO4-0.09(Ca0.8Sr0.2)TiO3 ceramics at 1300 °C for 4 h. It is proposed as a very promising dielectric for microwave applications requiring low dielectric loss.

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Dielectric characteristics and sintering behavior of Mg₂TiO₄-(Ca_0.8Sr_0.2)TiO₃ ceramic system at microwave frequency

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