Vanadate is a general term for the
pentavalent Vanadium oxy acid salts. It is similar to the situation of
phosphate. Vanadate from solution crystallization, Vanadate ions sometimes has
a structure similar to the solution, sometimes also have some changes, such as
partial Vanadate VO in solution to form V3O ion triangle. In the anhydrous
potassium Vanadate is formed by VO4 tetrahedra is an infinite chain structure
unit. When there are other ions in solution, such as oxygen radical containing
silicon, phosphorus, arsenic, tin, molybdenum, tungsten, vanadium ion VO can
also become the corresponding heteropoly acid and their condensation. As with
the Vanadium Pentoxide, vanadium acid salt can also be used as catalyst for
oxidation reaction. Dissolved Vanadium Pentoxide in the concentrated solution
of Sodium Hydroxide, Sodium Vanadate solution can be obtained which is
colorless, Vanadium in Vanadate VO from. In aqueous solution,with the increase
of the acidity of the solution, Vanadate in different degree of condensation
and the formation of multi anion different.
Vanadate can be used as a chemical reagent
and catalysts, mordant as well as manufacture of Vanadium Pentoxide or
vanadium, iron and other raw materials. Vanadate pigments not only color and
decoration, with increased strength, corrosion-resistant coating, light,
weather and other special properties, such as temperature indicating paint to
indicate that the surface temperature.
The development and application of vanadium
bismuth yellow pigment in foreign countries is quite active, attract people's
attention. Using Ammonium Vanadate pigment in black leather and ink dye,
durable and non corrosive nib. In order to YVO4 europium activated for imaging,
color TV tube.
Vanadate also has some applications in
glass and ceramic industrial, such as:
Vanadate can be made of a variety of
colored glass, with semiconductor properties of glass, utraviolet radiation
absorbing glass, porcelain like coating color enamel and so on. Vanadate also developed
for photosensitive agent and colorant, in photography and film industry.
