Improved microwave dielectric properties of $(Mg_1_�_(_x_+_y_)Ca_xLa_y)(Ti_1_�_yAl_y)O3$ ceramics

Kutty, TRN and Jayanthi, S (2005) Improved microwave dielectric properties of $(Mg_1_�_(_x_+_y_)Ca_xLa_y)(Ti_1_�_yAl_y)O3$ ceramics. In: Applied Physics Letters, 86 . 122902/1-3.

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Abstract

Phase-singular solids of the composition, $(Mg_1_�_(_x_+_y_)Ca_xLa_y)(Ti_1_�_yAl_y)O3$ (x=0 to 0.88; y=0.05 to 0.35) having the cubic perovskite-type structure were prepared by the substitution of La3+ and Al3+ in equivalent quantities which brought about complete miscibility between MgTiO3 and CaTiO3. These ceramics showed relative permittivities of 16.5 to 50 (at 6 GHz) with increasing Ca content, high Q values of 10 000 to 30 000 and retained near-zero temperature coefficients in permittivity at optimum y values. Their dielectric characteristics are better accountable in terms of the positional disorder rather than the tolerance factor of perovskite structure.

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics
Additional Information:	Copyright for this article belongs to American Institute of Physics (AIP).
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	21 Mar 2005
Last Modified:	19 Sep 2010 04:18
URI:	http://eprints.iisc.ac.in/id/eprint/2768

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