Publication

Dielectric and Structural Characteristics of Ba-Based and Sr-Based Complex Perovskites as a Function of Tolerance Factor

Nava Setter
1994
Journal Articles

Abstract

The temperature coefficient of the dielectric permittivity (tau(epsilon)) of nonferroelectric complex perovskites is of importance in the application of these cermaics to microwave filters and resonators. Recent work has directly related changes in the tau(epsilon) of complex perovskites to the onset of structural phase transitions which involve tilting of the octahedra. It can be argued that the onset of octahedral tilting is controlled by the tolerance factor (t). Thus, a relationship between tau(epsilon) and t is postulated. This relationship is discussed and transmission electron microscopy is used to demonstrate examples of the structural modifications which cause the anomalies in tau(epsilon) at given values of t.

Official source

https://infoscience.epfl.ch/entities/publication/3e6af0fb-7a43-4cba-831d-4ade8089c688

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Nava Setter
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3e6af0fb-7a43-4cba-831d-4ade8089c688

About this result

Related concepts (22)

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In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field. When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, or free, electrons that may drift through the material, but instead they shift, only slightly, from their average equilibrium positions, causing dielectric polarisation.

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Related publications (1)

Dielectric and Structural Characteristics of Ba-Based and Sr-Based Complex Perovskites as a Function of Tolerance Factor

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