The Dissolving Behavior of Titanium and Barium Ions Dissolved into Water from The Glasses of B_2O_3-TiO_2-BaO System

The dissolving behavior of titanium and barium ions dissolved into water from glasses of B_2O_3-TiO_2-BaO system was studied in this paper. Twenty eight kinds of glasses in this system were melted in electric furnace, about 1300℃, four hours. The melted glasses were crushed to particles of 35-60 meshes and 2 g of them were immersed in 50ml water of 30,50 and 70℃ while being stirred for 10,20,40 and 80 minutes respectively. Then the amounts of titanium and barium ions dissolved into water were measured by chelatometric titration. The results are as follows. 1) The experimental data were tested by analysis of variance and it is found that log of dissolved amounts was linear function of log of dissolving time and reciprocal of dissolving temperature and has no interaction term of time and temperature. That is, the dissolving amounts are proportional to t1/4 and apparent average dissolving energy is 1.27×10^3K for titanium ions and the dissolving amounts are proportional to t3/5 and dissolving energy is 1.87×10^3K for barium ions. 2) There are no special regularity between the behavior of dissolving ions and composition of glasses and chemical properties of glasses of no. 18,23 and 24 are very good.