Antimony Oxide (Sb2O3)-Powder introduce:
Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite. Like most polymeric oxides, Sb2O3 dissolves in aqueous solutions with hydrolysis.
Molar mass：291.518 g/mol
Density：5.2 g/cm3, α-form
5.67 g/cm3 β-form
Melting point：656 °C (1,213 °F; 929 K)
Boiling point：1,425 °C (2,597 °F; 1,698 K) (sublimes)
Solubility in water：370 ± 37 µg/L between 20.8°C and 22.9°C
Solubility：soluble in acid
Magnetic susceptibility (χ)：-69.4·10−6 cm3/mol
Refractive index (nD)：2.087, α-form
Crystal structure：cubic (α)<570 °C
orthorhombic (β) >570 °C
The annual consumption of antimony(III) oxide in the United States and Europe is approximately 10,000 and 25,000 tonnes, respectively. The main application is as flame retardant synergist in combination with halogenated materials. The combination of the halides and the antimony is key to the flame-retardant action for polymers, helping to form less flammable chars. Such flame retardants are found in electrical apparatuses, textiles, leather, and coatings.
Antimony(III) oxide is an opacifying agent for glasses, ceramics and enamels.
Some specialty pigments contain antimony.
Antimony(III) oxide is a useful catalyst in the production of polyethylene terephthalate (PET plastic) and the vulcanization of rubber.
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