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General
- Titanium dioxide,
also known as titanium(IV) oxide or titania, is the naturally occurring
oxide of titanium, chemical formula TiO2, When used as a
pigment, it is called titanium white, Pigment White 6.
- Titanium dioxide
is obtained from a variety of ores that contain ilmenite, rutile,
anatase and leucoxene, which are mined from deposits located throughout
the world.
- It is
noteworthy for its wide range of applications, from paint to sunscreen
to food colouring.
Process
- Titanium dioxide
occurs in nature as the well-known naturally occurring minerals rutile,
anatase and brookite.
- The most
common form is rutile, which is also the most stable form.
- Most titanium
dioxide pigment is produced from titanium mineral concentrates by the
chloride or sulfate process, either as the rutile or the anatase form.
- Anatase and
brookite both convert to rutile upon heating. Rutile, anatase and
brookite all contain 6 coordinate titanium. Additionally there are three
metastable forms produced synthetically and five high pressure forms
Technology
The non-porous films are synthesized by a modified
sol-gel method employing a mixture of titania sol and colloidal TiO2
particles to immobilize commercially available TiO2 powder nano
particles.
Market
-
The per capita consumption of
titanium dioxide in USA is about 3.4 Kg.
-
The consumption in Asia-Pacific
region is about 0.2 Kg.
-
The Indian consumption,
however, is extremely low at less than 0.05 Kg.
-
Titanium dioxide is produced
and marketed in two grades, They are Rutile and Anatase.
-
Rutile has close packed
structure whereas Anatase has, more open structure.
Application
- Pigmentary and
ultra fine titanium dioxide were tested for carcinogenicity by oral
administration in mice and rats.
-
Titanium dioxide (TiO2) is a multifaceted compound,
It’s the stuff that makes toothpaste white and paint opaque.
-
TiO2 to make self-cleaning ceramic tiles for use in
hospitals, public restrooms, and other settings where cleanliness is
vitally important, as well as on hard-to-reach rooftops, where simple
sunlight and rainwater can help prolong the life of the roof.
-
Titanium Dioxide is used as extensively in
paint, paper, plastic and other industries.
-
High purity titanium dioxide is an important
electronic material.
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