<abstract xmlns="http://www.w3.org/1999/xhtml"> 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. </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.

Phase evolution and microwave dielectric properties of A5M5O17-type ceramics

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Phase evolution and microwave dielectric properties of AMO-type ceramics

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...

Phase evolution and microwave dielectric properties of A₅M₅O₁₇-type ceramics

Published Online: Jul 26, 2017

Page range: 362 - 367

Received: Sep 23, 2016

Accepted: Mar 22, 2017

DOI: https://doi.org/10.1515/msp-2017-0047

Keywords
A5M5O17, dielectrics, microwave properties

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Phase evolution and microwave dielectric properties of A5M5O17-type ceramics

Published Online: Jul 26, 2017

Page range: 362 - 367

Received: Sep 23, 2016

Accepted: Mar 22, 2017

DOI: https://doi.org/10.1515/msp-2017-0047

KeywordsA5M5O17, dielectrics, microwave properties

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Phase evolution and microwave dielectric properties of A₅M₅O₁₇-type ceramics

Keywords
A5M5O17, dielectrics, microwave properties