High thermal conductivity aluminum nitride ceramics for high power microwave tubes

Author

Savrun, Ender ; Nguyen, Victor ; Abe, D.K.

Author_Institution

Sienna Technol., Inc., Woodinville, WA, USA

fYear

2002

fDate

2002

Firstpage

34

Lastpage

35

Abstract

Sienna Technologies, Inc., has successfully developed a family of high thermal conductivity aluminum nitride (AlN) based dielectrics as an alternative to BeO and BeO-SiC composites in microwave tubes. A pressureless sintering process was developed to fabricate high thermal conductivity (185-200 W/m-K), low loss (tan δ = 0.0007 at 9 GHz), pure AlN for collector rods and rf windows. The collector rods were successfully tested in two different tube designs. The thermal performance of our ST-180 grade AlN collector rods is illustrated.

Keywords

aluminium compounds; ceramics; dielectric losses; dielectric materials; microwave materials; microwave tubes; sintering; thermal conductivity; 9 GHz; AlN; RF window; aluminum nitride ceramic; collector rod; dielectric loss; high power microwave tube; pressureless sintering process; thermal conductivity; Aluminum nitride; Bonding; Ceramics; Composite materials; Conducting materials; Dielectric losses; Dielectric materials; Microwave technology; Testing; 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.2002.999246

Filename

999246