Effect of copper addition on density and magnetic susceptibility of lithium borate glasses

Glasses of the (100−x) (Li2O·2B2O3)·x CuO system, where x=0, 5, 10, 15, 20, 25 mol%, were prepared by melt quench technique. The glass samples were studied by magnetic susceptibility, density and infrared (IR) spectroscopic measurements. Molar volumes were estimated from density data.IR spectroscopic and density data show that the copper ions play a network modifier role and some ions as a network former by increasing the copper content in the studied glasses.The magnetic susceptibility data show a variable behavior due to the presence of two types of copper ions, cuprous (Cu+) and cupric (Cu2+), in all samples.