A method for the production of borosilicate glasses, borate glasses and crystallizing boron-containing materials

摘要

A process for producing a borate hold strength low-alkali material, wherein a boron-containing material to be melted in a unit with a skull crucible with a wall with cooled tubes, which are spaced apart from one another such that the walls of a distance between 2 mm to 4 mm, preferably 2,5 mm to 3,5 mm, with an alternating electromagnetic field is directly heated inductively, and wherein the material to be melted as a component of at least one metal oxide, the metal ions two - or are of higher valency, with a mole fraction of at least 25 mol%, and wherein the ratio of the molar quantities of silicon dioxide to borate in the melting charge is less than or equal to 0,5.