CO induces the reduction of Mo in the glass liquid to molybdenum carbide to form glass defects in the hybrid furnace

In this work, a ceramic platinum continuous melting optical glass furnace containing oxygen combustion was taken as an example to analyze the causes of a unique glass defect. It was finally determined that the defect in the glass was composed of the top condensate, the brick skeleton, and the Mo₂C generated in the glass liquid. It was determined that the monoclinic Al₂O₃ and ZrO₂ phase in the brick desorbed the surface hydroxyl and water molecules under the high temperature environment inside the furnace, forming Lewis acid sites with the ability to adsorb electrons. CO was adsorbed on the surface of Al₂O₃ and ZrO₂ by Lewis acid sites and fell into the glass liquid with the top condensate and the brick skeleton.CO then reduced Mo ions in the glass melt to form Mo₂C, causing the formation of the defects in the glass.