Effect of ZnO additive on sintering behavior and microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3 ceramics

Cheng Liang Huang, Jiun Liang Hou, Chung Long Pan, Chi Yuen Huang, Chun Wei Peng, Chih Hung Wei, Yi Hong Huang

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The effects of ZnO additive on the microstructures, the phase formation and the microwave dielectric properties of MgTiO3-CaTiO3 ceramics were investigated. The sintering temperature of ZnO-doped 0.95MgTiO3-0.05CaTiO3 ceramics can be lowered to 1300 °C due to the liquid phase effect. Formation of second phase MgTi2O5 can be effectively restrained through the addition of ZnO. The microwave dielectric properties are found strongly correlated with the sintering temperature as well as the amount of ZnO addition. At 1300 °C, 0.95MgTiO3-0.05CaTiO3 ceramics with 1 wt% ZnO addition possesses a dielectric constant εr of 20, a Q × f value of 65,000 (at 7 GHz) and a τf value of -5.8 ppm/°C. In comparison with pure 0.95MgTiO3-0.05CaTiO3 ceramics, the doped sample shows not only a 16% loss reduction but also a lower sintering temperature. That makes it a very promising material to replace the present one for GPS patch antennas.

Original languageEnglish
Pages (from-to)359-363
Number of pages5
JournalJournal of Alloys and Compounds
Volume450
Issue number1-2
DOIs
Publication statusPublished - 2008 Feb 14

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Dielectric properties
Sintering
Microwaves
Microstrip antennas
Temperature
Global positioning system
Permittivity
Microstructure
Liquids
magnesium titanate
perovskite

All Science Journal Classification (ASJC) codes

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

Cite this

Huang, Cheng Liang ; Hou, Jiun Liang ; Pan, Chung Long ; Huang, Chi Yuen ; Peng, Chun Wei ; Wei, Chih Hung ; Huang, Yi Hong. / Effect of ZnO additive on sintering behavior and microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3 ceramics. In: Journal of Alloys and Compounds. 2008 ; Vol. 450, No. 1-2. pp. 359-363.
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abstract = "The effects of ZnO additive on the microstructures, the phase formation and the microwave dielectric properties of MgTiO3-CaTiO3 ceramics were investigated. The sintering temperature of ZnO-doped 0.95MgTiO3-0.05CaTiO3 ceramics can be lowered to 1300 °C due to the liquid phase effect. Formation of second phase MgTi2O5 can be effectively restrained through the addition of ZnO. The microwave dielectric properties are found strongly correlated with the sintering temperature as well as the amount of ZnO addition. At 1300 °C, 0.95MgTiO3-0.05CaTiO3 ceramics with 1 wt{\%} ZnO addition possesses a dielectric constant εr of 20, a Q × f value of 65,000 (at 7 GHz) and a τf value of -5.8 ppm/°C. In comparison with pure 0.95MgTiO3-0.05CaTiO3 ceramics, the doped sample shows not only a 16{\%} loss reduction but also a lower sintering temperature. That makes it a very promising material to replace the present one for GPS patch antennas.",
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Effect of ZnO additive on sintering behavior and microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3 ceramics. / Huang, Cheng Liang; Hou, Jiun Liang; Pan, Chung Long; Huang, Chi Yuen; Peng, Chun Wei; Wei, Chih Hung; Huang, Yi Hong.

In: Journal of Alloys and Compounds, Vol. 450, No. 1-2, 14.02.2008, p. 359-363.

Research output: Contribution to journalArticle

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N2 - The effects of ZnO additive on the microstructures, the phase formation and the microwave dielectric properties of MgTiO3-CaTiO3 ceramics were investigated. The sintering temperature of ZnO-doped 0.95MgTiO3-0.05CaTiO3 ceramics can be lowered to 1300 °C due to the liquid phase effect. Formation of second phase MgTi2O5 can be effectively restrained through the addition of ZnO. The microwave dielectric properties are found strongly correlated with the sintering temperature as well as the amount of ZnO addition. At 1300 °C, 0.95MgTiO3-0.05CaTiO3 ceramics with 1 wt% ZnO addition possesses a dielectric constant εr of 20, a Q × f value of 65,000 (at 7 GHz) and a τf value of -5.8 ppm/°C. In comparison with pure 0.95MgTiO3-0.05CaTiO3 ceramics, the doped sample shows not only a 16% loss reduction but also a lower sintering temperature. That makes it a very promising material to replace the present one for GPS patch antennas.

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