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Titanium Dioxide (TiO2)

Titania exists in a number of crystalline forms the most important of which are anatase and rutile. Pure titanium dioxide does not occur in nature but is derived from ilmenite or leuxocene ores. It is also readily mined in one of the purest forms, rutile beach sand. These ores are the principal raw materials used in the manufacture of titanium dioxide pigment. The first step is to purify the ore, and is basically a refinement step. Either the sulphate process, which uses sulphuric acid as an extraction agent or the chloride process, which uses chlorine, may achieve this. After purification the powders may be treated (coated) to enhance their performance as pigments.

TiO2_tgt

Applications for sintered titania are limited by its relatively poor mechanical properties. It does however find a number of electrical uses in sensors and electrocatalysis. By far its most widely used application is as a pigment, where it is used in powder form, exploiting its optical properties.
Pigments, The most important function of titanium dioxide however is in powder form as a pigment for providing whiteness and opacity to such products such as paints and coatings (including glazes and enamels), plastics, paper, inks, fibres and food and cosmetics.
Titanium dioxide is by far the most widely used white pigment. Titania is very white and has a very high refractive index – surpassed only by diamond. The refractive index determines the opacity that the material confers to the matrix in which the pigment is housed. Hence, with its high refractive index, relatively low levels of titania pigment are required to achieve a white opaque coating.
The high refractive index and bright white colour of titanium dioxide make it an effective opacifier for pigments. The material is used as an opacifier in glass and porcelain enamels, cosmetics, sunscreens, paper, and paints. One of the major advantages of the material for exposed applications is its resistance to discoloration under UV light.
Photocatalysis,Titania acts as a photosensitiser for photovoltaic cells, and when used as an electrode coating in photoelectrolysis cells can enhance the efficiency of electrolytic splitting of water into hydrogen and oxygen.
Oxygen Sensors, Even in mildly reducing atmospheres titania tends to lose oxygen and become sub stoichiometric. In this form the material becomes a semiconductor and the electrical resistivity of the material can be correlated to the oxygen content of the atmosphere to which it is exposed.? Hence titania can be used to sense the amount of oxygen (or reducing species) present in an atmosphere.
Antimicrobial Coatings, The photocatalytic activity of titania results in thin coatings of the material exhibiting self cleaning and disinfecting properties under exposure to UV radiation. These properties make the material a candidate for applications such as medical devices, food preparation surfaces, air conditioning filters, and sanitaryware surfaces.
Base Information

Table 1. Typical physical and mechanical properties of titania.

Property		Property
Density	4 gcm-3	Microhardness (HV0.5)	880
Porosity	0%	Resistivity (25°C)	1012 ohm.cm
Modulus of Rupture	140MPa	Resistivity (700°C)	2.5x104 ohm.cm
Compressive Strength	680MPa	Dielectric Constant (1MHz)	85
Poisson’s Ratio	0.27	Dissipation factor (1MHz)	5x10-4
Fracture Toughness	3.2 Mpa.m-1/2	Dielectric strength	4 kVmm-1
Shear Modulus	90GPa	Thermal expansion (RT-1000°C)	9 x 10-6
Modulus of Elasticity	230GPa	Thermal Conductivity (25°C)	11.7 WmK-1

Table 2. Optical properties of titania.

Phase	Refractive Index	Density (g.cm-3)	Crystal Structure
Anatase	2.49	3.84	Tetragonal
Rutile	2.903	4.26	Tetragonal

Titanium Dioxide (TiO2) Sputtering Targets

Purity---99.9%,99.95%,99.99%

Refractive index --- 2.5-2.9

Shape--- Discs, Plate, Step (Dia ≤200mm,, Thickness ≥1mm)

Rectangle, Sheet, Step (Length ≤300mm, Width ≤200mm, Thickness ≥1mm)

Tube( Diameter< 300mm, Thickness >2mm )

Application ---For RF sputtering machane,used for High index film, multilayer interference filters.

Relation target--- SiO2 sputtering target.

Titanium Oxide Sputtering Targets (TiOx target) (For DC sputter)

TiOx_tgt

Purity---99.9%,99.95%,99.99%

Shape--- Discs, Plate, Step (Dia ≤200mm,, Thickness ≥1mm)

Rectangle, Sheet, Step (Length ≤300mm, Width ≤200mm, Thickness ≥1mm)

Tube( Diameter< 300mm, Thickness >2mm )

Application ---For DC sputtering machane,used for high index film, multilayer interference filters.

Relation target --- SiO2 sputtering target...

Titanium Dioxide (TiO2) Evaporation Material

TiO2_eva
Density--- rutile 4.26 g/cm3, brookite 4.17 g/cm3, anatase 3.84 g/cm3
Melting point ---1820℃±20℃,Vapour pressure at 1780℃ 1 Pa,at 1930℃ 10 Pa Solubility--- insoluble in water, sparingly soluble in sulphuric acid, sparingly soluble in alkalisLinear expansion coefficient ---9.19×10-6/K
Specific heat capacity--- 0.711 KJ/KgK
Hardness ---(acc. to Mohs) rutile 6 -- 6.5, anatase 5.5 -- 6(acc. to Knoop) rutile 879 Kg/mm2
Properties of thin film---
     Transmission range 400 ～ 12000nm
     Refractive index at 470nm ～2.4, at 550nm ～ 2.3, at 630nm ～ 2.2
     Structure Substrate temperature below 200℃: amorphous
     Substrate temperature above 300℃: rutile     Extremely hard and resistant when deposited onto hot substrates.
Hints on evaporation---
     Evaporation with electron-beam gun
     Substrate temperature 250～ 300 ℃
     Evaporation pressures 5×10-3 to 2×10-2Pa
     Rate of condensation about 10 ～ 20 nm/min
Purity--- 99.9% Shape---solid substance, Black or white tablets ,3-8mm irregular pieces, flakes.Area---Highly refractive layers, Multi-layer for laser, mirrors, beam -splitters, heat reflecting mirrors, etc,

Titanium Dioxide (TiO2) Powder

Purity--- 99.9%,99.99%

Titanium Dioxide Nanometer Powder(TiO2)

Purity--- 99.5%(anatase), 99%(Rutile)

Granularity --- D50:5nm (anatase), 30nm(Rutile)

Specific Surface Area (M2/g) --- 120(anatase), 30(Rutile)　