Patent AT-E399742-T1: [Translated] MODIFICATION OF ALKALINE EARTH METAL SILICATE FIBERS

A method of making refractory alkaline earth silicate fibres from a melt, comprises the use as an intended component of alkali metal but not including where at least 75mol% of the alkali metal is potassium to improve the mechanical properties of the fibre in comparison with a fibre free of alkali metal.