Crystal structure and dielectric properties of La(Mg0.5Ti 0.5)O3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies

Jhih Yong Chen; Cheng Liang Huang

doi:10.1016/j.jallcom.2010.09.048

Crystal structure and dielectric properties of La(Mg_0.5Ti _0.5)O₃-Ca_0.8Sm_0.4/3TiO₃ solid solution system at microwave frequencies

Jhih Yong Chen
, Cheng Liang Huang

Department of Electrical Engineering

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

8 Citations (Scopus)

Abstract

The crystal structure and the dielectric properties of (1 - x)La(Mg _0.5Ti_0.5)O₃-xCa_0.8Sm _0.4/3TiO₃ ceramics have been investigated. Ca _0.8Sm_0.4/3TiO₃ was employed as a τ_f compensator and was added to La(Mg_0.5Ti _0.5)O₃ to achieve a temperature-stable material. The formation of (1 - x)La(Mg_0.5Ti_0.5)O₃-xCa _0.8Sm_0.4/3TiO₃ solid solutions were confirmed by the XRD results and the measured lattice parameters for all compositions. The dielectric properties are strongly correlated to the sintering temperature and the compositional ratio of the specimens. Although the ε_r of the specimen could be boosted by increasing the amount of Ca_0.8Sm _0.4/3TiO₃, it would instead render a decrease in the Q × f. The τ_f value is strongly correlated to the compositions and can be controlled by the existing phases. A new microwave dielectric material 0.45La(Mg_0.5Ti_0.5)O ₃-0.55Ca_0.8Sm_0.4/3TiO₃, possessing a fine combination of microwave dielectric properties with an ε_r of 47.83, a Q × f of 26,500 GHz (at 6.2 GHz) and a τ_f of -1.7 ppm/°C, is proposed as a very promising candidate material for today's 3G applications.

Original language	English
Pages (from-to)	426-430
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.09.048
Publication status	Published - 2011 Jan 12

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.09.048

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title = "Crystal structure and dielectric properties of La(Mg0.5Ti 0.5)O3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies",

abstract = "The crystal structure and the dielectric properties of (1 - x)La(Mg 0.5Ti0.5)O3-xCa0.8Sm 0.4/3TiO3 ceramics have been investigated. Ca 0.8Sm0.4/3TiO3 was employed as a τf compensator and was added to La(Mg0.5Ti 0.5)O3 to achieve a temperature-stable material. The formation of (1 - x)La(Mg0.5Ti0.5)O3-xCa 0.8Sm0.4/3TiO3 solid solutions were confirmed by the XRD results and the measured lattice parameters for all compositions. The dielectric properties are strongly correlated to the sintering temperature and the compositional ratio of the specimens. Although the εr of the specimen could be boosted by increasing the amount of Ca0.8Sm 0.4/3TiO3, it would instead render a decrease in the Q × f. The τf value is strongly correlated to the compositions and can be controlled by the existing phases. A new microwave dielectric material 0.45La(Mg0.5Ti0.5)O 3-0.55Ca0.8Sm0.4/3TiO3, possessing a fine combination of microwave dielectric properties with an εr of 47.83, a Q × f of 26,500 GHz (at 6.2 GHz) and a τf of -1.7 ppm/°C, is proposed as a very promising candidate material for today's 3G applications.",

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

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

year = "2011",

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T1 - Crystal structure and dielectric properties of La(Mg0.5Ti 0.5)O3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies

AU - Chen, Jhih Yong

AU - Huang, Cheng Liang

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

PY - 2011/1/12

Y1 - 2011/1/12

N2 - The crystal structure and the dielectric properties of (1 - x)La(Mg 0.5Ti0.5)O3-xCa0.8Sm 0.4/3TiO3 ceramics have been investigated. Ca 0.8Sm0.4/3TiO3 was employed as a τf compensator and was added to La(Mg0.5Ti 0.5)O3 to achieve a temperature-stable material. The formation of (1 - x)La(Mg0.5Ti0.5)O3-xCa 0.8Sm0.4/3TiO3 solid solutions were confirmed by the XRD results and the measured lattice parameters for all compositions. The dielectric properties are strongly correlated to the sintering temperature and the compositional ratio of the specimens. Although the εr of the specimen could be boosted by increasing the amount of Ca0.8Sm 0.4/3TiO3, it would instead render a decrease in the Q × f. The τf value is strongly correlated to the compositions and can be controlled by the existing phases. A new microwave dielectric material 0.45La(Mg0.5Ti0.5)O 3-0.55Ca0.8Sm0.4/3TiO3, possessing a fine combination of microwave dielectric properties with an εr of 47.83, a Q × f of 26,500 GHz (at 6.2 GHz) and a τf of -1.7 ppm/°C, is proposed as a very promising candidate material for today's 3G applications.

AB - The crystal structure and the dielectric properties of (1 - x)La(Mg 0.5Ti0.5)O3-xCa0.8Sm 0.4/3TiO3 ceramics have been investigated. Ca 0.8Sm0.4/3TiO3 was employed as a τf compensator and was added to La(Mg0.5Ti 0.5)O3 to achieve a temperature-stable material. The formation of (1 - x)La(Mg0.5Ti0.5)O3-xCa 0.8Sm0.4/3TiO3 solid solutions were confirmed by the XRD results and the measured lattice parameters for all compositions. The dielectric properties are strongly correlated to the sintering temperature and the compositional ratio of the specimens. Although the εr of the specimen could be boosted by increasing the amount of Ca0.8Sm 0.4/3TiO3, it would instead render a decrease in the Q × f. The τf value is strongly correlated to the compositions and can be controlled by the existing phases. A new microwave dielectric material 0.45La(Mg0.5Ti0.5)O 3-0.55Ca0.8Sm0.4/3TiO3, possessing a fine combination of microwave dielectric properties with an εr of 47.83, a Q × f of 26,500 GHz (at 6.2 GHz) and a τf of -1.7 ppm/°C, is proposed as a very promising candidate material for today's 3G applications.

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Crystal structure and dielectric properties of La(Mg_0.5Ti _0.5)O₃-Ca_0.8Sm_0.4/3TiO₃ solid solution system at microwave frequencies

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