"Given the ceramic yield (CY) in air of a silicone, the desired silicate will be obtained operating with a weight ratio between oxide and polymer equal to WR??CY. If the metal oxide is provided starting from a carbonate or other compounds, like sulfates, nitrates, etc., the weight ratio between filler and polymer will be inferred from the WR??CY product, according to the yield in the metal oxide of" . . . .