Molten glass conveying equipment element, method for manufacturing molten glass conveying equipment element, glass manufacturing apparatus comprising molten glass conveying equipment element and method for manufacturing glass product

摘要

A method for producing a molten glass conveying equipment element. The molten glass conveying equipment element has a conduit structure for molten glass containing at least one conduit comprising platinum or a platinum alloy, a first ceramic structure provided around the conduit and a second ceramic structure located around the first ceramic structure. The method includes filling a gap between the conduit and the second ceramic structure with a slurry body, and sintering the slurry body at a temperature of 1,300 to 1,550° C., thereby forming the first ceramic structure. The slurry body is prepared by blending specific first particles, specific second particles and specific third particles with specific mass ratios.

主权项

1. A method for producing a molten glass conveying equipment element having a conduit structure for molten glass containing at least one conduit comprising platinum or a platinum alloy, a first ceramic structure provided around the conduit and a second ceramic structure located around the first ceramic structure, the method comprising:
filling a gap between the conduit and the second ceramic structure with a slurry body, the slurry body being prepared by blending: first particles having a median diameter D50 of 0.2 to 10 μm and containing, in terms of mass % to an entire composition, 90 wt % or more of zirconium oxide; second particles having a median diameter D50 of 0.2 to 2 mm and containing, in terms of mass % to the entire composition, 75 wt % or more of zirconium oxide, in which a proportion of cubic zirconia in the zirconium oxide is 80 wt % or more, and containing at least one of stabilizers selected from the group consisting of yttrium oxide and cerium oxide in a total content of 6 to 25 wt %; and third particles having a median diameter D50 of 1 to 500 μm and containing, in terms of mass % to the entire composition, 50 wt % or more of silicon dioxide, so as to satisfy that a mass ratio of a mass of the first particles to a mass of the second particles (mass of the first particles/mass of the second particles) is 0.25 to 0.6, and a mass ratio of a mass of the third particles in terms of silicon dioxide to a total mass of the first particles and the second particles (mass of the third particles in terms of silicon dioxide/(mass of the first particles+mass of the second particles)) is 0.05 to 0.2; and sintering the slurry body at a temperature of 1,300 to 1,550° C., thereby forming the first ceramic structure.