PROCESS FOR PRODUCTION OF MAGNESIUM FLUORIDE SOL SOLUTIONS FROM ALKOXIDES COMPRISING ADDITION OF MAGNESIUM SALTS

摘要

The invention relates to a method for obtaining a magnesium fluoride (MgF2) sol solution, comprising the steps of providing a magnesium alkoxide precursor in a non-aqueous solvent and adding 1.85 to 2.05 molar equivalents of non-aqueous hydrofluoric acid, characterized in that the reaction proceeds in the presence of a second magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of magnesium, or of a catalytic amount of a strong, volatile acid; and/or an additive non-magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of lithium, antimony, tin calcium, strontium, barium, aluminium, silicium, zirconium, titanium or zinc. The invention further relates to sol solutions, method of applying the sol solutions of the invention to surfaces as a coating, and to antireflective coatings obtained thereby.

主权项

1. A method for obtaining a magnesium fluoride (MgF2) sol solution, comprising the steps of
a. providing a magnesium alkoxide in a non-aqueous solvent in a first volume and b. adding, in a second volume, 1.85 to 2.05 molar equivalents of anhydrous hydrogen fluoride (HF) to said magnesium alkoxide,
characterized in that c. the reaction proceeds in the presence of
i. a second magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as chloride, bromide, iodide, nitrate or triflate of magnesium, and/orii. at least one additive non-magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as chloride, bromide, iodide, nitrate or triflate of lithium, antimony, tin, calcium, strontium, barium, aluminium, silicium, zirconium, titanium or zinc,