Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

October 2002

Comments

Copyright The American Ceramic Society. Reprinted from Journal of the American Ceramic Society, Volume 85, Issue 10, October 2002, pages 2487-2491.

Abstract

The synthesis, structure, and dielectric properties of the so-called M-phase solid solutions in the Li2O-Ta2O5-TiO2 system were investigated. Although the range of stability of the tantalate phases is more limited compared with their niobate counterparts, they have identical structures based on intergrowths of LiTaO3-type blocks separated by corundum type layers. The dielectric constants of the tantalate M-phases range from 68 to 52 and they all exhibit a negative temperature coefficient of capacitance. The temperature coefficient of the resonant frequency measured in the microwave region can be tuned to zero, and the system shows quite good quality factors with the highest value reaching a Q x f = 10500 at 6.7 GHz.

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Date Posted: 03 December 2004

This document has been peer reviewed.