Cerium Oxide

Cerium oxide, also known as ceric oxide, ceria, or cerium dioxide, is an oxide of the rare earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2. Cerium oxide is formed by the calcination of cerium oxalate or cerium hydroxide. Powdered ceria is slightly hygroscopic and will also absorb a small amount of carbon dioxide from the atmosphere.

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Uses for Cerium Oxide

Ceramics and photosensitive glass
As a catalyst and catalyst support
In lapidary to polish glass and stones
In the walls of self-cleaning ovens as a hydrocarbon oxidation catalyst
Infrared filters
As an oxidizing species in catalytic converters
Uses in glass include medical tubing for UV protection, optical filters to reduce UV haze and for UV protection in pink ophthalmic glass, gamma radiation shielding glasses
In automotive catalytic converter, cerium oxide is used to stabilize alumina
A replacement for tin oxide in the porcelain enamel field
An opacifier for special effects in the tile industry