@ARTICLE{Vafaei, author = {vafaei, samira and Hekmat shoar, Mohammad Hossein and }, title = {Investigation of structural and optical properties of glasses with composition of ( P2O5 – V2O5 – Li2O – K2O )}, volume = {21}, number = {0}, abstract ={Glassy thin films with composition of 40P2O5 – 30V2O5 – (30 – x)Li2O – xK2O , were prepared by conventional melt quenching method . X-ray diffraction patterns confirmed the glassy character of the samples.UV and IR properties of samples have been investigated. Non linearly variation of optical band gap and Urbach energy have exhibited a mixed alkali effect. IR spectroscopies confirmed the existence of P-O-P,PO -, PO2 ,V-O-V,V-O-P,V═O bond groups. }, URL = {http://opsi.ir/article-1-517-en.html}, eprint = {http://opsi.ir/article-1-517-en.pdf}, journal = {Accepted and Presented Articles of OPSI Conferences}, doi = {}, year = {2015} }