Conference Proceeding

Extrinsic loss mechanisms in BST for tunable RF/Microwave passive components

Dept. of Ceramic & Mater. Eng., Rutgers Univ., Piscataway, NJ
02/2000; DOI:10.1109/ISAF.2000.941539 ISBN: 0-7803-5940-2 pp.191 - 194 vol. 1 In proceeding of: Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on, Volume: 1
Source: IEEE Xplore

ABSTRACT Dielectric properties of (Ba1-xSrx)TiO3
 of x=0.35-0.55 were studied in the frequency range 1-3 GHz.
Samples sintered at 1350°C for 3 hours in oxygen exhibited
permittivity values > 400 along with ~3% loss at >1GHz. Air
sintered samples had higher loss (~5%) and lower permittivity. This
peculiar behavior of paraelectric BST is discussed within the framework
of the model proposed by Vendik et al.[1969]. Extended sintering times
(~6 hours) were found to promote lower losses (~0.4%) and it can be
attributed to higher chemical homogeneity and larger grain size

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Keywords

al.[1969]. Extended sintering times
 
frequency range 1-3 GHz
 
higher chemical homogeneity
 
larger grain size
 
lower permittivity
 
Vendik
 

E.K. Akdogan