Tin Oxide ( SnO2 ) Stannic Oxide - Properties and Applications

Background

Tin oxide (SnO2) is also known as stannic oxide. It can be found naturally as the mineral cassiterite.

It is typically a white to off-white and sometime grey crystalline solid.

Key Properties

Property

Value

Density (g/cm3)

6.90-7.00

Melting Point (°C)

1630

Applications

Tin oxide is most commonly used in glazes where it acts as an opacifier where it is typically added in the range of 5-10%. When used correctly it will produce an opaque, glossy glaze. If used in excess a dull/matt glaze can result. Potters have used tin oxide as an opacifier for hundreds of years.

The addition of larger amounts of tin 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 tin 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 tin oxide.

 

Primary author: AZoM.com

 

Date Added: Feb 4, 2004 | Updated: Jun 11, 2013
Comments
  1. chemist kannan chemist kannan India says:

    What is moleculer weight of SnO2, Sb2O3, Poly(vinyl chloride)?

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