How to distinguish rutile and anatase titanium dioxide?
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In raw material testing, how can one distinguish between rutile-type and anatase-type titanium dioxide?
This post was last edited by qugd on July 2, 2012 at 17:41. Titanium dioxide; titanium white; titanium pigment; titanium dioxide; titania. Molecular formula: TiO2. Molecular weight: 79.88. CAS number: . Density: 3.84 (at 20°C) (anatase)； 4.26 (20°C) (rutile); Melting point: 1720 (anatase) ； 1640 (rutile) °C Refractive index: 2.52 (anatase) ； 2.7 (Rutile) There are two types of products: one is rutile-type titanium dioxide, which has a relative density of 4.26 and a refractive index of 2.72. It exhibits excellent light resistance, making it suitable for outdoor use ； The other type is anatase titanium dioxide, which has a relative density of 3.84 and a refractive index of 2.55. It has poor light resistance and is mostly used in indoor paints. Density, melting point, and refractive index are used for judgment.
In our company, the differentiation between rutile and anatase titanium dioxide is done using XRD; naturally, this is also the case throughout the titanium dioxide industry.