Titanium Dioxide stabilization

In the production of titanium dioxide, sodium silicate is used as a source of
soluble silica, which is precipitated onto the particle surface to form a clear,
chemically inert layer. This improves dispersibility and stability for paint, paper
and plastics applications.
How It Works
Adding silicate to an acidic slurry of TiO2 results in the formation of silica gel on
the particle surfaces. This precipitated coating protects the TiO2 from UV light
that would otherwise discolor it. A 3.3 ratio sodium silicate is most often used
for this application.
Recommended Literature
Titanium Dioxide Stabilization

Pigment Stabilization
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