Microwave dielectric properties of (1 - x)(Mg0.95Co0.05)TiO3- xCa0.6La0.8/3TiO3 ceramics with V2O5 addition

Cheng-Liang Huang, Jun Jie Wang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The microstructures and the microwave dielectric properties of the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.6La0.8/3TiO3 has dielectric properties of dielectric constant εr ∼ 109, Q × f value ∼ 17,600 GHz and a large positive τf value ∼ 213 ppm/°C. (Mg0.95Co0.05)TiO3 ceramics possesses high dielectric constant (εr ∼ 16.8), high quality factor (Q × f value ∼ 230,000 GHz), and negative τf value (-54 ppm/°C). As the x value varies from 0.1 to 0.8, (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system has the dielectric properties as follows: 21.55 < εr < 75.44, 21,000 < Q × f < 90,000 and -10 < τf < 140. By appropriately adjusting the x value in the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system, zero τf value can be achieved. With x = 0.15, a dielectric constant εr ∼ 25.78, a Q × f value ∼ 84,000 GHz (at 9 GHz), and a τf value ∼ 2 ppm/°C were obtained for 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics sintered at 1400 °C for 4 h. For practical application in communication systems, it is desirable to be able to sinter at lower temperatures. Therefore, V2O5 was as a sintering aid for lowering the sintering temperature of0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics. At the same time, the 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramic system with 0.5 wt% V2O5 can be obtained good properties at the microwave frequencies for 1200 °C.

Original languageEnglish
Pages (from-to)1349-1354
Number of pages6
JournalSolid-State Electronics
Volume50
Issue number7-8
DOIs
Publication statusPublished - 2006 Jul 1

Fingerprint

Dielectric properties
dielectric properties
Permittivity
Microwaves
ceramics
microwaves
Sintering
Positive temperature coefficient
Microwave frequencies
Temperature
permittivity
Communication systems
sintering
Microstructure
microwave frequencies
vanadium pentoxide
temperature
telecommunication
Q factors
adjusting

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

@article{94bb7b53c0e64861be71e64f6703537e,
title = "Microwave dielectric properties of (1 - x)(Mg0.95Co0.05)TiO3- xCa0.6La0.8/3TiO3 ceramics with V2O5 addition",
abstract = "The microstructures and the microwave dielectric properties of the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.6La0.8/3TiO3 has dielectric properties of dielectric constant εr ∼ 109, Q × f value ∼ 17,600 GHz and a large positive τf value ∼ 213 ppm/°C. (Mg0.95Co0.05)TiO3 ceramics possesses high dielectric constant (εr ∼ 16.8), high quality factor (Q × f value ∼ 230,000 GHz), and negative τf value (-54 ppm/°C). As the x value varies from 0.1 to 0.8, (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system has the dielectric properties as follows: 21.55 < εr < 75.44, 21,000 < Q × f < 90,000 and -10 < τf < 140. By appropriately adjusting the x value in the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system, zero τf value can be achieved. With x = 0.15, a dielectric constant εr ∼ 25.78, a Q × f value ∼ 84,000 GHz (at 9 GHz), and a τf value ∼ 2 ppm/°C were obtained for 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics sintered at 1400 °C for 4 h. For practical application in communication systems, it is desirable to be able to sinter at lower temperatures. Therefore, V2O5 was as a sintering aid for lowering the sintering temperature of0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics. At the same time, the 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramic system with 0.5 wt{\%} V2O5 can be obtained good properties at the microwave frequencies for 1200 °C.",
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Microwave dielectric properties of (1 - x)(Mg0.95Co0.05)TiO3- xCa0.6La0.8/3TiO3 ceramics with V2O5 addition. / Huang, Cheng-Liang; Wang, Jun Jie.

In: Solid-State Electronics, Vol. 50, No. 7-8, 01.07.2006, p. 1349-1354.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microwave dielectric properties of (1 - x)(Mg0.95Co0.05)TiO3- xCa0.6La0.8/3TiO3 ceramics with V2O5 addition

AU - Huang, Cheng-Liang

AU - Wang, Jun Jie

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Y1 - 2006/7/1

N2 - The microstructures and the microwave dielectric properties of the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.6La0.8/3TiO3 has dielectric properties of dielectric constant εr ∼ 109, Q × f value ∼ 17,600 GHz and a large positive τf value ∼ 213 ppm/°C. (Mg0.95Co0.05)TiO3 ceramics possesses high dielectric constant (εr ∼ 16.8), high quality factor (Q × f value ∼ 230,000 GHz), and negative τf value (-54 ppm/°C). As the x value varies from 0.1 to 0.8, (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system has the dielectric properties as follows: 21.55 < εr < 75.44, 21,000 < Q × f < 90,000 and -10 < τf < 140. By appropriately adjusting the x value in the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system, zero τf value can be achieved. With x = 0.15, a dielectric constant εr ∼ 25.78, a Q × f value ∼ 84,000 GHz (at 9 GHz), and a τf value ∼ 2 ppm/°C were obtained for 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics sintered at 1400 °C for 4 h. For practical application in communication systems, it is desirable to be able to sinter at lower temperatures. Therefore, V2O5 was as a sintering aid for lowering the sintering temperature of0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics. At the same time, the 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramic system with 0.5 wt% V2O5 can be obtained good properties at the microwave frequencies for 1200 °C.

AB - The microstructures and the microwave dielectric properties of the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.6La0.8/3TiO3 has dielectric properties of dielectric constant εr ∼ 109, Q × f value ∼ 17,600 GHz and a large positive τf value ∼ 213 ppm/°C. (Mg0.95Co0.05)TiO3 ceramics possesses high dielectric constant (εr ∼ 16.8), high quality factor (Q × f value ∼ 230,000 GHz), and negative τf value (-54 ppm/°C). As the x value varies from 0.1 to 0.8, (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system has the dielectric properties as follows: 21.55 < εr < 75.44, 21,000 < Q × f < 90,000 and -10 < τf < 140. By appropriately adjusting the x value in the (1 - x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3 ceramic system, zero τf value can be achieved. With x = 0.15, a dielectric constant εr ∼ 25.78, a Q × f value ∼ 84,000 GHz (at 9 GHz), and a τf value ∼ 2 ppm/°C were obtained for 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics sintered at 1400 °C for 4 h. For practical application in communication systems, it is desirable to be able to sinter at lower temperatures. Therefore, V2O5 was as a sintering aid for lowering the sintering temperature of0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramics. At the same time, the 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.6La0.8/3TiO3 ceramic system with 0.5 wt% V2O5 can be obtained good properties at the microwave frequencies for 1200 °C.

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