Cerium dioxide is an inorganic solid, mono‐constituent, appearing under the form of a white ivory to pale beige powder.  Cerium Oxide (CeO₂) is the polishing compound of choice today. It works fast and is easy to use, with little mess, and is the compound supplied with most commercially available mirror kits. Typical Cerium Oxide particle sizes are about 3 microns. Cerium Oxide is off-white to brown colored powder sometimes called cerium dioxide, cerium (IV) oxide, ceric oxide, ceria.  Its trade or hobby names can also be “Jeweler’s Rough” or “Opticians Rough”.  CeO₂ is a natural compound most commonly used in ceramics, to polish glass and gems, to sensitize photosensitive glass and in a variety of other applications. Cerium Oxide can be mixed with water to form a paste or slurry.  Compatible with most polishing pads it can be used in both low and high speed equipment with recirculating systems. Cerium dioxide powder with the finest particle size is used for industrial polishing.

Application:

• Precision Polishing
• Lapping
• Ceramic Parts

Particle Size Distribution:

CeO 99

CeO 99

CeO 65

Sizing

<6.0 µm

0.5 µm

Median (d₅₀ %)

< 1.5 microns

0.5 µm

1-2 microns

d₁₀

< 1.0 microns

0.1 µm

< 1.0 microns

d₉₀

5.0 microns

1.4 µm

3-4 microns

d₁₀₀

6.0 microns

< 2.0 µm

≤ 5 microns

Chemistry

Grades

CeO 99

CeO 99

CeO 65

Sizing

<6.0 µm

0.5 µm

Total Rare Earth Oxide (TREO)

99%

99%

98%

CeO₂

99.90 % Min

99.90 % Min

65 % Min

Al

0.055% Max

0.055% Max

-

Fe

0.02% Max

0.02% Max

-

CaO

0.01 % Max

0.01 % Max

0.07 % Max

SiO₂

0.01 % Max

0.01 % Max

-

La₂O₃

-

-

29.5 % Typical

Pr6O11

-

-

4.3 % Typical

Nd₂O₃

-

-

0.1 % Typical

MgO

-

-

0.03 % Typical

ZnO

-

-

0.002 % Typical

Fe₂O₃

-

-

0.009 % Typical

Loss on Ignition

0.30 Max

0.30 Max

0.6 Typical