AlN-based lossy ceramics for high power applications

Author

Mikijelj, Biljana ; Abe, David K.

Author_Institution

Ceradyne, Inc., Costa Mesa, CA, USA

fYear

2002

fDate

2002

Firstpage

32

Lastpage

33

Abstract

This paper presents materials properties and RF cold test results obtained for several types of Ceradyne aluminum nitride (AIN) based electromagnetically lossy dielectrics. These materials have been recently developed as an alternative to beryllia (BeO) based materials. Historically, BeO-SiC composites have been the material of choice for high average power microwave/millimeter-wave applications because of their relatively high thermal conductivity (130 W/m-K). However, growing concerns over beryllium-related health/environmental issues, a shrinking supply base, and the limited number of machining/grinding facilities capable of handling beryllium-based materials have prompted the development of more environmentally-friendly alternatives.

Keywords

aluminium compounds; ceramics; composite materials; dielectric losses; dielectric materials; microwave materials; thermal conductivity; AlN; Ceradyne; RF cold test; aluminum nitride composite; environmentally-friendly material; high power applications; lossy ceramic dielectric; thermal conductivity; Aluminum nitride; Ceramics; Conducting materials; Dielectric losses; Dielectric materials; Magnetic losses; Material properties; Materials testing; Radio frequency; Thermal conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International

Print_ISBN

0-7803-7256-5

Type

conf

DOI

10.1109/IVELEC.2002.999245

Filename

999245