Physicochemical Studies Of Some Borate Glasses Containing Nickel And Titanium Oxides In Relation To Their Structure

Spectrophotometric, magnetic susceptibility and density molar volume studies on a number of alkali borate glasses containing nickel and titanium oxides were carried out to obtain information on their structure. The effect of replacing one of the main constituents of the glasses by one of the mono, di, tri or tetravalent metal oxides was studied and the effect of nickel and titanium oxide concentrations also investigated. The experimental results are analysed and explained by assuming that nickel exists in glass as divalent nicel ions in two different states of coordination, i.e. octahedral and tetrahedral while titanium ions exist mostly in octahedral environments with some tetragonal distortions.