Dear Sunny, 

Please have a look into the following link, Hopefully u will get you answer 

http://www.coorstek.com/materials/ceramics/carbides_WC.php

http://whites.sdsmt.edu/classes/ee692gwmm/additional/NIST_Tech_Note_1520.pdf

Thanks 

Dear Manoj, I have already seen both of these links. Unfortunately they don't provide dielectric loss factor of WC.

I can't find much on the electro-magnetic properties of pure tungsten carbide in my reference database, but in according to an entry in old book I have (Schwarzkopf and Kieffer, "Refractory Hard Metals", 1953) which references an even older paper in german, (W. Klemm and W. Schüth, Z. anorg. allg. Chem., 201, 24, 1931) the (volume?) magnetic susceptibility of WC is +0.05 x 10^-6

DOI: 10.1002/zaac.19312010103

Thank you Dr. Moseley for the reference.