Dielectric characteristics of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system at microwave frequencies

Cheng-Liang Huang, Shih Sheng Liu

Research output: Contribution to journalLetter

29 Citations (Scopus)

Abstract

The microstructure and the microwave dielectric properties of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system were investigated. Mg2TiO4 possesses a dielectric constant (εr) of 14, a high quality factor (Q × f) of 150,000 GHz, and a temperature coefficient of resonant frequency (τf) of -50 ppm/°C. To achieve a temperature-stable material, SrTiO3f ∼1100 ppm/°C) was added to Mg2TiO4. The two-phase system was confirmed by the X-ray diffraction patterns, the EDS and the measured lattice parameters. The Q × f decreased as x increased. The εr, however, increased with increasing x and varied from 16.06 to 18.98 as x increased from 0.02 to 0.1. A new microwave dielectric material having an εr of ∼17.79, a Q × f of ∼70,900 GHz (at 10 GHz), and a τf of ∼-3.3 ppm/°C has been obtained from 0.94Mg2TiO4-0.06SrTiO3 ceramics sintered at 1440 °C for 4 h. It is proposed as a candidate material for today's 3G applications.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume471
Issue number1-2
DOIs
Publication statusPublished - 2009 Mar 5

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Microwave frequencies
Microwaves
Dielectric properties
Diffraction patterns
Lattice constants
Energy dispersive spectroscopy
Natural frequencies
Permittivity
X ray diffraction
Temperature
Microstructure
strontium titanium oxide

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Dielectric characteristics of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system at microwave frequencies",
abstract = "The microstructure and the microwave dielectric properties of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system were investigated. Mg2TiO4 possesses a dielectric constant (εr) of 14, a high quality factor (Q × f) of 150,000 GHz, and a temperature coefficient of resonant frequency (τf) of -50 ppm/°C. To achieve a temperature-stable material, SrTiO3 (τf ∼1100 ppm/°C) was added to Mg2TiO4. The two-phase system was confirmed by the X-ray diffraction patterns, the EDS and the measured lattice parameters. The Q × f decreased as x increased. The εr, however, increased with increasing x and varied from 16.06 to 18.98 as x increased from 0.02 to 0.1. A new microwave dielectric material having an εr of ∼17.79, a Q × f of ∼70,900 GHz (at 10 GHz), and a τf of ∼-3.3 ppm/°C has been obtained from 0.94Mg2TiO4-0.06SrTiO3 ceramics sintered at 1440 °C for 4 h. It is proposed as a candidate material for today's 3G applications.",
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Dielectric characteristics of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system at microwave frequencies. / Huang, Cheng-Liang; Liu, Shih Sheng.

In: Journal of Alloys and Compounds, Vol. 471, No. 1-2, 05.03.2009.

Research output: Contribution to journalLetter

TY - JOUR

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AU - Huang, Cheng-Liang

AU - Liu, Shih Sheng

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N2 - The microstructure and the microwave dielectric properties of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system were investigated. Mg2TiO4 possesses a dielectric constant (εr) of 14, a high quality factor (Q × f) of 150,000 GHz, and a temperature coefficient of resonant frequency (τf) of -50 ppm/°C. To achieve a temperature-stable material, SrTiO3 (τf ∼1100 ppm/°C) was added to Mg2TiO4. The two-phase system was confirmed by the X-ray diffraction patterns, the EDS and the measured lattice parameters. The Q × f decreased as x increased. The εr, however, increased with increasing x and varied from 16.06 to 18.98 as x increased from 0.02 to 0.1. A new microwave dielectric material having an εr of ∼17.79, a Q × f of ∼70,900 GHz (at 10 GHz), and a τf of ∼-3.3 ppm/°C has been obtained from 0.94Mg2TiO4-0.06SrTiO3 ceramics sintered at 1440 °C for 4 h. It is proposed as a candidate material for today's 3G applications.

AB - The microstructure and the microwave dielectric properties of the (1 - x)Mg2TiO4-xSrTiO3 ceramic system were investigated. Mg2TiO4 possesses a dielectric constant (εr) of 14, a high quality factor (Q × f) of 150,000 GHz, and a temperature coefficient of resonant frequency (τf) of -50 ppm/°C. To achieve a temperature-stable material, SrTiO3 (τf ∼1100 ppm/°C) was added to Mg2TiO4. The two-phase system was confirmed by the X-ray diffraction patterns, the EDS and the measured lattice parameters. The Q × f decreased as x increased. The εr, however, increased with increasing x and varied from 16.06 to 18.98 as x increased from 0.02 to 0.1. A new microwave dielectric material having an εr of ∼17.79, a Q × f of ∼70,900 GHz (at 10 GHz), and a τf of ∼-3.3 ppm/°C has been obtained from 0.94Mg2TiO4-0.06SrTiO3 ceramics sintered at 1440 °C for 4 h. It is proposed as a candidate material for today's 3G applications.

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