TY - GEN
T1 - Advanced ceramics for microwave tubes
AU - Carmel, Y.
AU - Lloyd, I.
AU - Olorunyolemi, T.
AU - Wilson, O.
AU - Xu, G.
AU - Pert, E.
AU - Gershon, D.
N1 - Publisher Copyright:
© 2000 IEEE.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - The search for advanced, high performance ceramics for microwave tubes with improved thermal and electrical properties brought about an increased interest in novel processing and characterization techniques. AlN-SiC composites are being studied as possible replacement materials for BeO and BeO-SiC composites currently used in microwave tubes. Such a replacement is needed because beryllium based powders are toxic and long term carcinogenic. Although the dielectric properties of AlN-SiC can be made to closely match the dielectric properties of BeO-SiC, the AlN based system is not yet a suitable substitute when high thermal conductivity is required. Our work is focused on (a) microwave processing of AlN and AlN-SiC composites, and (b) material characterization in order to discover the relationships that link the microstructure, constitution and processing history with the resultant material properties. Microwave-processing techniques suitable for AlN and AlN-SiC composites, as well as ultra rapid (4800°C/min) microwave processing, will be discussed. Dielectric, thermal and microstructure characterization techniques will be also described.
AB - The search for advanced, high performance ceramics for microwave tubes with improved thermal and electrical properties brought about an increased interest in novel processing and characterization techniques. AlN-SiC composites are being studied as possible replacement materials for BeO and BeO-SiC composites currently used in microwave tubes. Such a replacement is needed because beryllium based powders are toxic and long term carcinogenic. Although the dielectric properties of AlN-SiC can be made to closely match the dielectric properties of BeO-SiC, the AlN based system is not yet a suitable substitute when high thermal conductivity is required. Our work is focused on (a) microwave processing of AlN and AlN-SiC composites, and (b) material characterization in order to discover the relationships that link the microstructure, constitution and processing history with the resultant material properties. Microwave-processing techniques suitable for AlN and AlN-SiC composites, as well as ultra rapid (4800°C/min) microwave processing, will be discussed. Dielectric, thermal and microstructure characterization techniques will be also described.
UR - http://www.scopus.com/inward/record.url?scp=85001187401&partnerID=8YFLogxK
U2 - 10.1109/OVE:EC.2000.847522
DO - 10.1109/OVE:EC.2000.847522
M3 - Conference contribution
AN - SCOPUS:85001187401
T3 - International Vacuum Electronics Conference 2000, IVEC 2000
BT - International Vacuum Electronics Conference 2000, IVEC 2000
PB - Institute of Electrical and Electronics Engineers
T2 - International Vacuum Electronics Conference, IVEC 2000
Y2 - 2 May 2000 through 4 May 2000
ER -