Leaching of phase-separated glasses in the Na2O-B2O3-SiO2-Fe2O3 system

Abstract

The leaching behavior of heat-treated phase-separated iron-containing sodium borosilicate glasses within the range of compositions of 8Na₂O·(22 – х)B₂O₃·70SiO₂·хFe₂O₃, where х varies from 0.3 to 10 mol.%, and (8 – x)Na₂O∙22B₂O₃∙70SiO₂· xFe₂O₃, where х varies from 2 to 6 mol.%, in the 3M aqueous HCl solution at boiling, was studied. It has been shown that the introduction of Fe₂O₃ in these phase-separated glasses increases their chemical durability, the values of porosity and the average pore diameter, but reduces the specific surface area in the porous glasses based on them, compared with glass without Fe₂O₃. The compositions suitable for producing porous glasses were determined.

DOI: http://dx.doi.org/10.5755/j01.ct.67.1.14800