La description
Titanium dioxide is the most widely used white pigment because of
its brightness and very high refractive index, in which it is
surpassed only by a
few other materials.
Approximately 4.6 million tons of pigmentary TiO2 are consumed
annually worldwide, and this number is expected to increase as
consumption continues to rise. When deposited as a thin film, its
refractive index and colour make it an excellent reflective optical
coating for
dielectric mirrors and some
gemstones like "mystic fire
topaz". TiO2 is also an effective
opacifier in powder form, where it is employed as a
pigment to provide whiteness and
opacity to products such as
paints,
coatings,
plastics,
papers,
inks,
foods,
medicines (i.e. pills and
tablets) as well as most
toothpastes. In paint, it is
often referred to offhandedly as "the perfect white", "the whitest
white", or other similar terms. Opacity is improved by optimal
sizing of the titanium dioxide particles. Some grades of titanium
based pigments as used in sparkly paints, plastics, finishes and
pearlescent cosmetics are man made pigments whose particles have
two or more layers of various oxides -amongst which we have often
titanium dioxide, iron oxide or alumina - , in order to have
glittering, iridescent and or pearlescent effects similar to a
certain extent to crushed
mica alone or
guanine based products, but in
addition to these effects a limited color change is possible in
certain formulations depending on how and at which angle the
finished product is illuminated and the thickness of the oxide
layer in the pigment particle : one or more colours appear by
reflection while the other tones appear due to interference of the
transparent titanium dioxide layers. These pigments are coined
"interference pigments". In some products, the layer of titanium
dioxide is grown in conjunction with iron oxide by calcination of
titanium salts (sulfates, chlorates) around **0°C or other
industrial deposition methods such as
chemical vapour deposition on
substrates which are natural or synthetic mica platelets or even
silicon dioxide crystal platelets of no more than *0
microns in diameter. The iridescent effect in these titanium oxide
particles (which are only partly natural ) is unlike the opaque
effect obtained with usual ground titanium oxide pigment obtained
by mining, in which case only a certain diameter of the particle is
considered and the effect is due only to scattering.
In
ceramic glazes titanium dioxide
acts as an opacifier and seeds
crystal formation.
Titanium dioxide has been shown statistically to increase skimmed
milk's whiteness, increasing skimmed milk's sensory acceptance
score.
Titanium dioxide is used to mark the white lines of some tennis
courts.
| Pays: |
India |
| N ° de modèle: |
13463-67-7 
|
| Prix FOB: |
(Negotiable)
Obtenir le dernier prix
|
| Localité: |
India |
| Prix de commande minimale: |
- |
| Commande minimale: |
1 Ton |
| Packaging Detail: |
- |
| Heure de livraison: |
- |
| Capacité de Fournir: |
1 Ton per Day |
| Payment Type: |
L/C, T/T |
| Groupe de produits : |
Inorganic Chemical
|
