Titanium(III) oxide
Encyclopedia
Titanium oxide (Ti2
Titanium
Titanium is a chemical element with the symbol Ti and atomic number 22. It has a low density and is a strong, lustrous, corrosion-resistant transition metal with a silver color....

O3
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...

) is a chemical compound
Chemical compound
A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms that are held together...

 of titanium and oxygen. It is prepared by reacting titanium dioxide with titanium metal at 1600°C.
Ti2O3 has the Al2O3, corundum structure. It is reactive with oxidising acids. At around 200°C there is a transition from semiconducting to metallic conducting.
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