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A novel series of borate glasses in the composition, xCo3O4+(50−x) (V2O5)+50 B2O3 where x=0.05 to 0.45 have been prepared by melt quenching technique. X-ray diffraction studies confirmed the non-crystalline nature of the samples. The room temperature density and molar volume varied non-linearly with cobalt concentration. Electrical conductivity and activation energy were determined and both varied...
A simple method is a FEM solution of two dimensional Helmholtz equations is developed in this paper. For calculating reflection and transmission coefficient of electromagnetic energy in the waveguide structure by varying frequency of input wave and diameter and length of waveguide by using relations K=π/d and f=KV/2π. The first step is modeling of waveguide by using finite element method and then...
A series of borate glasses of composition (B2O3)0.5, (Na2CO3)0.05-x, (Fe2O3) x where, x = 0.05, 0.1, 0.15, 0.2, and 0.25 have been synthesized by melt quench technique. The samples were annealed and their non-crystallinity confirmed by X-ray diffraction studies. The room temperature density was measured. The DC conductivity measurement were carried out for temperature range from 323K to 573K. The...
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