Short-range order analysis and some physical properties of InxSe1−x glasses

Bulk InxSe1−x (with x=5-25 at%) glasses were prepared using the melt-quench technique. Short range order(SRO) was examined by the X-ray diffraction using Cu(kα) radiation in the wave vector interval 0.28≤k≤6.5 A0−1.The SRO parameters have been obtained from the radial distribution function. The inter-atomic distance obtained from the first and second peak are r1=0.263 and r2=0.460 nm, which is equivalent In-Se and Se-Se bond length. The fundamental structural unit for the studied glasses is In2Se3 pyramid. Using the differential scanning calorimetry (DSC), the crystallization mechanism of InxSe1−x chalcogenide glass has been studied. The glass transition activation energy (Eg) is 289±0.3 kj/mol.There is a correlation amongst the glass forming ability, bond strength and the number of lone pair electrons. The utility of the Gibbs-Di Marzio relation was achieved by estimating Tg theoretically.