Premium
Polystyrene/Sr 2 Ce 2 Ti 5 O 15 composites with low dielectric loss for microwave substrate applications
Author(s) -
Subodh G.,
Deepu V.,
Mohanan P.,
Sebastian M.T.
Publication year - 2009
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21220
Subject(s) - materials science , dissipation factor , composite material , ceramic , polystyrene , dielectric loss , microstructure , dielectric , composite number , scanning electron microscope , microwave , relative permittivity , permittivity , strontium titanate , volume fraction , cerium , polymer , metallurgy , physics , optoelectronics , quantum mechanics
Sr 2 Ce 2 Ti 5 O 15 (Strontium Cerium Titanate or SCT) ceramic was prepared by solid‐state route. A composite of polystyrene/Sr 2 Ce 2 Ti 5 O 15 was made using melt mixing technique in a Kneading machine. The microstructure of the composite was investigated using a Scanning Electron Microscope. The dielectric properties of the composites were studied at radio frequency and microwave frequencies. It is observed that relative permittivity and loss tangent increase with volume fraction of the ceramics. The mechanical properties of the composites were investigated using microhardness tester. For 50 volume percentage loading of the ceramic, the composite has relative permittivity of 13.6and dielectric loss of 4.28 × 10 −4 . The experimentally observed permittivity was compared with the theoretical models. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers