Phase evolution and microwave dielectric properties of A5M5O17-type ceramics-Reference-Cited by-同舟云学术

Phase evolution and microwave dielectric properties of A5M5O17-type ceramics

Published:2017-07-26 Issue:2 Volume:35 Page:362-367
ISSN:2083-134X
Container-title:Materials Science-Poland
language:en
Short-container-title:

Author:

Ali Murad¹²,Iqbal Yaseen³,Muhammad Raz⁴

Affiliation:

1. Department of Physics, University of Malakand, Chakdara , KP, Pakistan

2. Materials Research Laboratory, Department of Physics, University of Peshawar, 25120 KP, Peshawar , Pakistan

3. Materials Research Laboratory, Department of Physics, University of Peshawar, 25120 KP, Mardan , Pakistan

4. Department of Physics, Abdul Wali Khan University Mardan, 23200 KP, Mardan , Pakistan

Abstract

Abstract A number of A5M5O17 (A = Na, Ca, Sr, La, Nd, Sm, Gd, Dy, Yb; B = Ti, Nb, Ta) type compounds were prepared by a solid-state sintering route and characterized in terms of structure, microstructure and microwave dielectric properties. The compatibility of rare earths with mixed niobate/tantalate and titanate phases was investigated. The larger ionic radii mismatch resulted in the formation of pyrochlore and/or mixed phases while in other cases, pure A5M5O17 phase was formed. The samples exhibited relative permittivity in the range of 35 to 82, quality factor (Q × fo) = 897 GHz to 11946 GHz and temperature coefficient of resonance frequency (τf) = -120 ppm/°C to 318 ppm/°C.

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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