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Cerium oxide

 

Synonims:

Cerium(IV) oxide, Ceric oxide, Ceria, Cerium dioxide

 
CAS No: 1306-38-3
EINECS No: 215-150-4
Formula: CeO2
 
Cerium(IV) oxide, also known as ceric oxide, ceric dioxide, ceria, cerium oxide or cerium dioxide, is an oxide of the rare-earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2.The principal application of ceria is for polishing, especially chemical-mechanical planarization (CMP). For this purpose, it has displaced many other oxides that were previously used, such as iron oxide and zirconia.
 
CeO2 is used to decolorize glass by converting green-tinted ferrous impurities to nearly colorless ferric oxides.
 
Cerium oxide has found use in infrared filters, as an oxidizing species in catalytic converters and as a replacement for thorium dioxide in incandescent mantles.
The interconvertibility of CeOx materials is the basis of the use of ceria for an oxidation catalyst.
One small but illustrative use is its use in the walls of self-cleaning ovens as a hydrocarbon oxidation catalyst during the high-temperature cleaning process. Another small scale but famous example is its role in oxidation of natural gas in gas mantles.
 
Ceria has been used as a sensor in catalytic converters in automotive applications, controlling the air-exhaust ratio to reduce NOx and carbon monoxide.
 
Cerium Oxide is also perfect for removing hardened grime or calcified stains on all types of glass.
Cerium oxide is used by the pros to remove scratches from automotive glass, mirrors, tabletops, windows and shower doors — even headlight lenses. Easily restore glass surfaces in your car or home to like-new condition. Just add water to cerium oxide powder for a high-grade scratch-removing compound.
Complete, step-by-step instructions on using cerium oxide powder to polish out scratches and stains on glass can be found below.
 
How to remove light scratches and stains with Cerium Oxide
 
MATERIALS
• Cerium Oxide powder • Two plastic tubs, pint or quart-sized
• Water
• Lint-free cloths or paper towels
• A 3” inch felt polishing wheel that attaches to an electric or rechargeable drill.
 
PROCEDURE
• Fill one of the tubs, about half full, with water and place the felt polishing wheel into the water to get it damp while you mix your polishing compound
• Place about two tablespoons of the cerium oxide into the other tub and add a small splash of water
• Use a small rod or stick to stir the mixture until the powder dissolves in the water. You’ll want to end up with a slurry that’s about the consistency of heavy cream. Keep stirring and adding small amounts of water until you reach the right consistency, which you can check with your finger.
• Make sure the glass is clean before you start and dampen it thoroughly with a clean lint-free towel.
• Check your felt polishing wheel. You want it damp, but not dripping wet.
• Attach the wheel to your electric or cordless drill and dip it lightly into the polishing slurry. Let any excess drip off into the tub.
• Buff the scratched area, starting slowly at first, then increasing the speed. Keep the felt polishing wheel moving from side to side at all times and use moderate pressure. Eventually, a dry film will form over the scratched area as you work. Stop buffing before the film is completely dry.
 
CAUTION:
• When the slurry is almost dry, be careful. Buffing dry glass can overheat it and it could crack. So don’t overdo it. Always be sure the surface is sufficiently damp when you are working on it.
• When the slurry is dry, just wipe it off.
• You can repeat the process if any scratches or stains are still visible.

If you have leftover compound, simply cover the tub to store it. When the slurry dries out, it can be reused simply by adding water.
 
Package: 500g, 1kg, 25kg





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