Dielectric characteristics of La(Co1/2Ti1/2)O 3 ceramics at microwave frequencies

Cheng Liang Huang; Jing Fang Tseng

doi:10.1016/j.matlet.2004.08.005

Dielectric characteristics of La(Co_1/2Ti_1/2)O ₃ ceramics at microwave frequencies

Cheng Liang Huang, Jing Fang Tseng

Department of Electrical Engineering

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

19 Citations (Scopus)

Abstract

The microwave dielectric properties of La(Co_1/2Ti _1/2)O₃ ceramics, prepared by conventional solid state route, have been investigated. The dielectric constant values (ε_r) saturated at 29.8-30. The Q×f values of 34000-67000 (at 10 GHz) can be obtained when the sintering temperatures are in the range of 1410-1470°C. The temperature coefficient of resonant frequency τ_f- was not sensitive to the sintering temperature. The ε_r value of 30, Q×f value of 67000 (at 10 GHz) and τ_f value of -63.7 ppm/°C were obtained for La(Co _1/2Ti_1/2)O₃ ceramics sintered at 1440°C for 6 h. For applications of high selective microwave ceramic resonator, filter and antenna, La(Co_1/2Ti_1/2)O₃ is proposed as a suitable material candidate.

Original language	English
Pages (from-to)	3732-3736
Number of pages	5
Journal	Materials Letters
Volume	58
Issue number	29
DOIs	https://doi.org/10.1016/j.matlet.2004.08.005
Publication status	Published - 2004 Nov 1

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Dielectric characteristics of La(Co1/2Ti1/2)O 3 ceramics at microwave frequencies",

abstract = "The microwave dielectric properties of La(Co1/2Ti 1/2)O3 ceramics, prepared by conventional solid state route, have been investigated. The dielectric constant values (εr) saturated at 29.8-30. The Q×f values of 34000-67000 (at 10 GHz) can be obtained when the sintering temperatures are in the range of 1410-1470°C. The temperature coefficient of resonant frequency τf- was not sensitive to the sintering temperature. The εr value of 30, Q×f value of 67000 (at 10 GHz) and τf value of -63.7 ppm/°C were obtained for La(Co 1/2Ti1/2)O3 ceramics sintered at 1440°C for 6 h. For applications of high selective microwave ceramic resonator, filter and antenna, La(Co1/2Ti1/2)O3 is proposed as a suitable material candidate.",

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N2 - The microwave dielectric properties of La(Co1/2Ti 1/2)O3 ceramics, prepared by conventional solid state route, have been investigated. The dielectric constant values (εr) saturated at 29.8-30. The Q×f values of 34000-67000 (at 10 GHz) can be obtained when the sintering temperatures are in the range of 1410-1470°C. The temperature coefficient of resonant frequency τf- was not sensitive to the sintering temperature. The εr value of 30, Q×f value of 67000 (at 10 GHz) and τf value of -63.7 ppm/°C were obtained for La(Co 1/2Ti1/2)O3 ceramics sintered at 1440°C for 6 h. For applications of high selective microwave ceramic resonator, filter and antenna, La(Co1/2Ti1/2)O3 is proposed as a suitable material candidate.

AB - The microwave dielectric properties of La(Co1/2Ti 1/2)O3 ceramics, prepared by conventional solid state route, have been investigated. The dielectric constant values (εr) saturated at 29.8-30. The Q×f values of 34000-67000 (at 10 GHz) can be obtained when the sintering temperatures are in the range of 1410-1470°C. The temperature coefficient of resonant frequency τf- was not sensitive to the sintering temperature. The εr value of 30, Q×f value of 67000 (at 10 GHz) and τf value of -63.7 ppm/°C were obtained for La(Co 1/2Ti1/2)O3 ceramics sintered at 1440°C for 6 h. For applications of high selective microwave ceramic resonator, filter and antenna, La(Co1/2Ti1/2)O3 is proposed as a suitable material candidate.

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