How is cerium oxide used in high-end ceramic and glass manufacturing?

How is cerium oxide used in high-end ceramic and glass manufacturing?
Cerium oxide plays two distinct roles in ceramics and glass. In glazes it acts as an opacifier and colorant: its high refractive index, second only to rutile, produces strong hiding power in opaque glazes, especially in the 1050-1100C range, and combined with titanium dioxide it yields bright yellow tones. Above roughly 8% loading it can even create distinctive luster glazes. In glass, cerium oxide works as a decolorizer and clarifier. Above 1400C it releases oxygen, shifting the iron equilibrium toward the less-colored ferric state and enlarging residual bubbles so they rise and clear. This makes it an attractive replacement for toxic arsenic and antimony decolorizers, a meaningful environmental and compliance advantage for producers.