Quick Search
CAS NUMBER: 18282-10-5
MOLECULAR FORMULA: SnO2
MOLECULAR WEIGHT: 150.71
Stannic oxide can be found naturally as the mineral cassiterite.
Stannic oxide is typically a white to off-white and sometime grey crystalline solid.
Stannic oxide is the inorganic compound with the formula SnO2.
The mineral form of SnO2 is called cassiterite, and this is the main ore of tin.
With many other names, Stannic oxide of tin is an important material in tin chemistry.
Stannic oxide is a colourless, diamagnetic, amphoteric solid.
Stannic oxide occurs naturally. Synthetic Stannic oxide is produced by burning tin metal in air.
Annual production is in the range of 10 kilotons.
Stannic oxide is reduced industrially to the metal with carbon in a reverberatory furnace at 1200–1300 °C.
Although Stannic oxide is insoluble in water, Stannic oxide is amphoteric, dissolving in base and acid.
Stannic acid refers to hydrated Stannic oxide, SnO2, which is also called "stannic oxide."
Stannic oxides dissolve in acids. Halogen acids attack SnO2 to give hexahalostannates, such as [SnI6]2−.
One report describes reacting a sample in refluxing HI for many hours.
Stannic oxide dissolves in strong bases to give "stannates," with the nominal formula Na2SnO3.
Dissolving the solidified Stannic oxide/NaOH melt in water gives Na2[Sn(OH)6], "preparing salt," which is used in the dye industry.
Stannic oxide appears as white or off-white crystalline solid or powder. mp: 1127°C, Sublimes: 1800-1900°C, density: 6.95 g/cm3 Insoluble in water.
Soluble in concentrated sulfuric acid, hydrochloric acid. Occurs in nature as the mineral cassiterite.
Used as a catalyst, in putty, as a polishing powder for steel and glass, in ceramic glazes and colors.
Flowers of Stannic oxide refers to the material collected as the result of condensation after sublimation.
White powder that is often incorrectly called Stannic oxide.
Stannic oxide, or tin dioxide, occurs in nature as the mineral Cassiterite.
Stannic oxide is used as an abrasive, sometimes in mixtures with lead oxide, for polishing glass, marble, silver, and jewelry.
Stannic oxide is also used as a Mordant for dyeing fabrics and as a weighting agent Additionally, Stannic oxide is used as an opacifier in Glass and glazes to produce a translucent milky color.
Stannic oxide reacts with chrome oxides to produce a ruby red color in glass and glazes.
Stannic oxide has long been used to opacify glazes in oxidation at all temperatures.
Stannic oxide is also a player in the development of ceramic colors, for example chrome tin pinks and maroons.
Stannic oxide with iron in oxidation makes a warmer shade of brown than zirconium does.
Stannic oxide can react with titanium and rutile to transform the color and character of a glaze.
Although Stannic oxide is a little more expensive, very little is required to produce stunning effects in many colored glazes.
The fully oxidized state of tin metal.
Stannic oxide is a very white powder of low density.
Although Stannic oxide melts at a very low temperature, the oxide form is quite refractory.
Stannic oxide has been used primarily as an opacifier in amounts of 3-15% in all types of glazes for many centuries.
The amount required varies according to the glaze composition and temperature.
The mechanism of the opacity depends on the white tin particles being in suspension in the molten glass.
At higher temperatures, these particles will start to dissolve and opacity will begin to be compromised.
In a cone 10 reduction firing, for example, 4% Stannic oxide in a transparent will have no opacifying effect.
Like zirconium oxide, larger amounts of Stannic oxide in lower temperature glazes have a refractory effect, stiffening the melt and increasing the incidence of pinholing and crawling.
Stannic oxide white is considered a softer white than that produced by the very popular and much cheaper zirconium opacifiers.
Stannic oxide forms pink colors with chrome oxide (if the chemistry of the host glaze is right).
The reaction is very sensitive, and even minute amounts of chrome can impart a pinkish hue to a tin-opacified glaze.
This sensitivity can be a problem if volatile chromium is flashing in the kiln atmosphere from other glazes, the white color of tin opacified glazes anywhere in the kiln can be affected.
Other opacifiers include zirconium oxide (gives a harsher glassy white), calcium phosphate (problems with off-coloring to greys), cerium oxide (restricted to low temperatures), antimony (dissolves in some glazes and gives yellows with lead), and titanium dioxide (discolors if any iron oxide is present and crystallizes easily).
A powder, off-white in color, produced thermally from high grade tin metal
Stannic oxide with the formula SnO is a compound of tin and oxygen where tin has the oxidation state of +2.
There are two forms, a stable blue-black form and a metastable red form.
Stannic oxide is the inorganic compound with the formula SnO2.
The mineral form of Stannic oxide is called cassiterite, and this is the main ore of tin.
With many other names (see infobox), Stannic oxide is the most important raw material in Stannic oxide chemistry.
This colourless, diamagnetic solid is amphoteric.
Stannic oxide, also known as Stannic oxide, is an inorganic compound consisted of tin and oxygen, which is widely applied in various fields.
The dominant usage of stannic oxide is to serve as a precursor in the production of other, especially trivalent, tin compounds or salts.
Stannic oxide is also commonly employed as an opacifier in glazes.
The addition of larger amounts of stannic oxide enhances the refractoriness of glazes and turns Stannic oxide from transparent to an opaque white.
Stannic oxide is also used in the production of customized glass by giving transparent glass an opaque, porcelain-like, opaque appearance.
Stannic oxide has proved to be a highly effective polishing material for glass and quarried rock, such as marble, granite and quartz.
Besides, Stannic oxide can be used for llumination with UV light in combination with cerium oxide in ceramic form.
Stannic oxide also has a broad range of applications in other areas, such as semiconductors, photovoltaic materials, solar cells, lithium ion batteries, photocatalysts, and as gas-sensing agents in solid-state detectors.
USES:
In conjunction with vanadium oxide, Stannic oxide is used as a catalyst for the oxidation of aromatic compounds in the synthesis of carboxylic acids and acid anhydrides.
Stannic oxide has long been used as an opacifier and as a white colorant in ceramic glazes.
This has probably led to the discovery of the pigment lead-tin-yellow, which was produced using Stannic oxide as a compound.
The use of Stannic oxide has been particularly common in glazes for earthenware, sanitaryware and wall tiles; see the articles tin-glazing and Tin-glazed pottery.
Stannic oxide remains in suspension in vitreous matrix of the fired glazes, and, with its high refractive index being sufficiently different from the matrix, light is scattered, and hence increases the opacity of the glaze.
The degree of dissolution increases with the firing temperature, and hence the extent of opacity diminishes.
Although dependent on the other constituents the solubility of Stannic oxide in glaze melts is generally low.
Stannic oxides solubility is increased by Na2O, K2O and B2O3, and reduced by CaO, BaO, ZnO, Al2O3, and to a limited extent PbO.
Stannic oxide has been used as pigment in the manufacture of glasses, enamels and ceramic glazes.
Pure Stannic oxide gives a milky white colour; other colours are achieved when mixed with other metallic oxides e.g. V2O5 yellow; Cr2O3 pink; and Sb2O5 grey blue.
Stannic oxide of tin has been utilized as a mordant in the dyeing process since ancient Egypt.
A German by the name of Kuster first introduced its use to London in 1533 and by means of it alone, the color scarlet was produced there.
Stannic oxide can be used as a polishing powder, sometimes in mixtures also with lead oxide, for polishing glass, jewelry, marble and silver.
Stannic oxide for this use is sometimes called as "putty powder" or "jeweler's putty".
Stannic oxide is used in sensors of combustible gases including carbon monoxide detectors.
In these the sensor area is heated to a constant temperature (few hundred °C) and in the presence of a combustible gas the electrical resistivity drops.
Room temperature gas sensors are also being developed using reduced graphene oxide-SnO2 composites(e.g. for ethanol detection).
Doping with various compounds has been investigated.
Doping with cobalt and manganese, gives a material that can be used in e.g. high voltage varistors.
Stannic oxide can be doped with the oxides of iron or manganese.
Stannic oxide is used to detect carbon monoxide. Used in ceramic glazes and colors, putty, perfume preparations, textiles, polishing powder for steel, and the manufacture of special glasses.
Stannic oxide is also used in making white patinas.
-Polishing glass and metals
-manufacture of milk-colored, ruby and alabaster glass, enamels, pottery, putty
-mordant in printing and dyeing fabrics
-in fingernail polishes
APPLICATIONS:
Stannic oxide is most commonly used in glazes where Stannic oxide acts as an opacifier where Stannic oxide is typically added in the range of 5-10%.
When used correctly Stannic oxide will produce an opaque, glossy glaze.
If used in excess a dull/matt glaze can result. Potters have used Stannic oxide as an opacifier for hundreds of years.
The addition of larger amounts of Stannic oxide to lower temperature glazes can increase its refractoriness, i.e. the molten glaze will have an increased viscosity increasing the possibility of pinholing and crawling.
The use of Stannic oxide is diminishing, with many potters moving towards the use of zircon, which is a cheaper alternative.
However, twice as much zircon is required to produce the same degree of opacity when compared to Stannic oxide.
-Glaze opacifiers
-pigments
-electronic ceramics
-capacitors
-special refractories
-conductive coatings
-chemicals
-lapidary and lens polishing
PROPERTIES:
-Composition: SnO or SnO2 - xH2O
-CAS: 18282-10-5
-Mohs Hardness: 6.0-7.0
-Melting Point: 1127
-Density: 6.6 - 6.9
-Molecular Weight: mol. wt. = 150.71
STRUCTURE:
Stannic oxide crystallises with the rutile structure.
Hydrous forms of Stannic oxide have been described as stannic acid.
Such materials appear to be hydrated particles of Stannic oxide where the composition reflects the particle size.
SYNONYM:
dioxotin
Cassiterite
Flowers of tin
Stannic oxide (SnO2)
TIN (IV) OXIDE
Cassiterite (SnO2)
Stannic dioxide
Tin Peroxide
White Stannic oxide
Stannic anhydride
1317-45-9
MFCD00011244
18232-10-5
Stannic oxide Nanoparticles / Nanopowder
Stannic oxide (SnO2)
tin-oxide
HSDB 5064
EINECS 242-159-0
Stannic oxide Nanowires
Stannic oxide Nanopowder
SnO2
CI 77861
Stannic Oxide Nanopowder
C.I. 77861
Stannic oxide Nanowires Properties
DTXSID8042474
CHEBI:52991
TIN (IV) OXIDE (AS Sn)
Stannic oxide (99.998%-Sn)
Stannic oxide Nanoparticle Dispersion
Ruthenium Oxide (RuO2) Sputtering Targets
Stannic oxide, nanoparticle (30-60 nm)
FT-0695331
Stannic oxide, 99.996% (metals basis)
EC 242-159-0
Stannic oxide, >=99.99% trace metals basis
Q129163
Stannic oxide, 15% in H2O colloidal dispersion
Stannic oxide, -325 mesh, 99.9% trace metals basis
Stannic oxide, nanopowder, <=100 nm avg. part. size
Stannic oxide, antimony doped, polymeric precursor, Oxide 30 wt%
