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Micr owave Dielectric Properties of (1-x)CaTiO3-xNd(Mg1/2Ti1/2)O3 Ceramics System

Published online by Cambridge University Press:  01 February 2011

Cheng-Liang Huang ,
Yuan-Bin Chen  and
Ching-Wen Lo
Cheng-Liang Huang
Affiliation:
Department of Electrical Engineering, National Cheng Kung University, 1 University Rd., Tainan 70101, Taiwan
Yuan-Bin Chen
Affiliation:
Department of Electrical Engineering, National Cheng Kung University, 1 University Rd., Tainan 70101, Taiwan
Ching-Wen Lo
Affiliation:
Department of Electrical Engineering, National Cheng Kung University, 1 University Rd., Tainan 70101, Taiwan
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Abstract

The microwave dielectric properties of (1-x)CaTiO3-xNd(Mg1/2Ti1/2)O3 (0.1≤x≤1.0) have been investigated. The system forms a solid solution throughout the entire compositional range. The dielectric constant decreases from 152 to 27 as x varies from 0.1 to 1.0. In the (1-x)CaTiO3-xNd(Mg1/2Ti1/2)O3 system, the microwave dielectric properties can be effectively controlled by varying the x value. A maximum quality factor Qxf=43000GHz (where f is the resonant frequency) was achieved for samples with x=0.9, although the dielectric properties varied with sintering temperature. The Qxf value of (1-x)CaTiO3-xNd(Mg1/2Ti1/2)O3 almost increased up to 1500°C, after which it decreased. At 1400°C, 0.1CaTiO3-0.9Nd(Mg1/2Ti1/2)O3 ceramics gives a dielectric constant εr of 42, a Qxf value of 35000 (GHz) and a τf value of -10 (ppm/°C).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 783: Symposium B – Materials, Intergration, and Packaging Issues for High-Frequency Devices , 2003 , B5.13
Copyright
Copyright © Materials Research Society 2004

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