A titanium-dioxide based ceramic composite dispersed with conducting inclusions as an EMI shielding material

Author

Iyer, V.R. ; Ungvichian, Vichate ; Neelakanta, Perambur S.

Author_Institution

Dept. of Electr. Eng., Florida Atlantic Univ., Boca Raton, FL, USA

fYear

1993

fDate

9-13 Aug 1993

Firstpage

168

Lastpage

169

Abstract

A class of composite materials constituted by conducting inclusions dispersed in a host ceramic medium (such as TiO₂) is described. This test composite is studied as a potential EMI (electromagnetic interference) shielding material. A mixture formula for predicting the effective electrical conductivity of the test composite in terms of the volume fraction and geometric aspect of the conducting inclusions and the permittivity of the host medium is indicated for calculating the shielding effectiveness of the material. Theoretical and experimental results are furnished and discussed. Depending on the conducting particulate loading, the shielding effectiveness of the composite(s) falls in the range of 5-20 dB over the frequency range of 500 MHz to 1 GHz

Keywords

UHF measurement; ceramics; composite materials; electrical conductivity; electromagnetic interference; electromagnetic shielding; permittivity; titanium compounds; 500 MHz to 1 GHz; EMI shielding material; TiO₂; UHF; ceramic composite; conducting inclusions; conducting particulate loading; effective electrical conductivity; electromagnetic interference; frequency range; mixture formula; permittivity; shielding effectiveness; test composite; volume fraction; Algorithm design and analysis; Ceramics; Composite materials; Conducting materials; Conductivity; Electromagnetic compatibility and interference; Electromagnetic interference; Frequency; Materials testing; Permittivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on

Conference_Location

Dallas, TX

Print_ISBN

0-7803-1304-6

Type

conf

DOI

10.1109/ISEMC.1993.473756

Filename

473756