Nonlinear dielectric composites

Ralf G. Struempler; Jakob Rhyner; Felix Greuter; Petra Kluge-Weiss

doi:10.1117/12.209804

22 May 1995 Nonlinear dielectric composites

Ralf G. Struempler, Jakob Rhyner, Felix Greuter, Petra Kluge-Weiss

Proceedings Volume 2441, Smart Structures and Materials 1995: Smart Materials; (1995) https://doi.org/10.1117/12.209804
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

Polymer composites with high dielectric constant are widely used as shielding and field grading materials. An improvement of the refractive grading can be expected for a dielectric constant being a nonlinear function of the electric field or the temperature, as it is known for nonlinear resistive field grading. An increase of the dielectric constant in those areas, where the highest electrical fields occur, will result in a homogenization of the field distribution. Such composite materials can be considered as having the smart functions of sensing and actuating. The influence of nonlinear properties of filler material on the resulting dielectric properties have been studied both theoretically and experimentally. Calculations using effective medium theory show how much of the non-linearity of the filler is transferred to the composite. They are compared with experiments on composites containing ferroelectric, semiconducting and varistor-type filler material in a thermoset or thermoplastic matrix. Depending on the filler type, the dielectric constant increases by a factor of up to three, for example, by raising the temperature from 30 degree(s)C to 150 degree(s)C. Such an enhancement can be sufficient to rearrange the field distribution in stressed insulating parts.

Citation Download Citation

Ralf G. Struempler, Jakob Rhyner, Felix Greuter, and Petra Kluge-Weiss "Nonlinear dielectric composites", Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); https://doi.org/10.1117/12.209804

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available