Chinese name: titanium pentoxide

Molecular formula: Ti3O5

Appearance: Black powder

Molecular weight: 79.8658

CAS: 12065-65-5

Density: 4.47g/cm3

Melting point: 1775℃

Transmittance range: 400-12000nm

Refractive index (500nm) : 2.2-2.4

Evaporation conditions: electron gun, oxygenation

Evaporation temperature: 1800-2000℃

Purpose:

Anti-reflection coating:

Titanium pentoxide is often used as an anti-reflection coating because of its high refractive 

index and good light transmission. By plating a thin layer of Ti3O5 coating on the surface of 

glass or plastic, light reflection can be significantly reduced and light transmission can be 

improved, which has important applications in optical devices such as eyeglass lenses and 

camera lenses.

Mirror coating:

Ti3O5 is also widely used in mirror coatings. Its high reflectivity makes it an ideal material for 

mirrors in telescopes and laser systems. By depositing a layer of Ti3O5 on the mirror, the 

reflection efficiency and durability of the mirror can be improved.

Filter coating:

Filters are key components in optical systems that selectively filter specific wavelengths of light. 

The unique optical properties of titanium pentoxide make it an ideal material for the manufacture 

of optical filters, especially in multilayer interference filters where the Ti3O5 layer can precisely 

regulate the transmission and reflection characteristics of light.

Mechanical properties:

The hardness and wear resistance of titanium pentoxide are also excellent. Its Vickers hardness 

is about 700 HV, making it excellent in high-stress and high-wear environments. Therefore, Ti3O5 

is widely used in the field of protective coatings requiring high wear resistance.

Optical properties:

Titanium pentoxide shows excellent properties in terms of optics, with a refractive index of about 2.4, 

making it ideal for a variety of optical applications. In terms of light transmission, Ti3O5 shows good 

transmission in the visible and near infrared spectral ranges, especially in the wavelength range of 

400 nm to 700 nm.