Dielectric loss is presently in the order of 10-2, which I wish to improve it to 10-3 to 10-4 range. I can understand, question is too broad but I would like to know most probable.
See that the material you prepared is highly homogenous, and represents a single phase compound. Check thoroughly for any minute secondary phase (if any). In case your are making a ceramic, see that is is highly dense, and maybe a higher sintering temp, and for some more extended duration can help in bettering sintering and higher density values. You can temperature variation studies, and figure out the ac and dc conduction mechanisms, and figure out the origin for the observed conduction, and see how it can be rectified during the material processing stage to further reduce your losses.
Once the ceramic sinter properly at suitable temperature, the density will increase, can get single phase without any phases. Automatically the looses will decrease.
@ Anthony. Presently, my objective is to obtain low dielectric loss in bulk. Anyway thin film process is also under consideration.
@ K.Sreenivas. I respect your views. XRD confirms no secondary phase. Sintering temperature I've varied from 1100-1450 Deg with single/double sintering process. Density ~97.6% is also close to TD. Since application is on high frequency area, DC conduction mechanism study will help?
@Venkata Ramana: Density ~95% sample shows better property than ~97.6%. Loss is not decreasing.
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