| 摘要 |
The invention relates to a method for obtaining a magnesium fluoride (MgF2) sol solution, comprising the steps of providing a magnesium precursor in a first volume in a non-aqueous solvent, and adding, in a second volume, 1.85 to 2.05 molar equivalents of anhydrous hydrogen fluoride (HF) per mole calcium precursor to said first volume, and adding a metal additive before, during or after step b), wherein said metal additive is calcium, in form of a calcium precursor, wherein the amount of said calcium additive, in relation to the amount of said magnesium precursor is 1:100 to 1:1, as measured in molar equivalents of said calcium additive to said magnesium precursor, and wherein additionally 1.85 to 2.05 molar equivalents of anhydrous hydrogen fluoride (nHFc) per mole calcium additive is present in said second volume. |
