Abstract
The optical properties in the uv-visible region of epoxy glass composite containing 0, 15, 35 and 55% by weight glass microballoons are reported. The obtained optical data are analysed in terms of absorption formula for non-crystalline materials. Assuming that non-direct transitions in the k-space are involved values of optical band gap ( E opt) were determined. From the Urbach edges, the width of the tail of localized states in the band gap ( E) were evaluated at room temperature.
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