Titanium nanopowder

Titanium micropowder and oxygen, we can produce titanium oxide nanopowders (TiOa),... 

Titanium micropowder and methane instead of oxygen, we will produce titanium carbide nanopowders (TiC),... 

Titanium micropowder and nitrogen instead of methane, we will produce titanium nitride nanopowders (TiN)... 

Titanium micropowder with argon and hydrogen, we will produce titanium metal nanopowders (Ti). 

For the corrosive line, the reactor is fully teflon-coated so we can use veiy aggressive products such as chlorides, ammonia or acetylene as precursors. It is possible to use silicon chloride or titanium chloride as precursor products to produce nanopowders containing silicon or titanium. An internal and an external scrubber neutralise the chloride with water (internal scrubber) and sodium hydroxide (NaOH). If we start with liquids or gases for precursors, the particle sizK distribution of the end product will be much better controlled. 

In another research report by Yoshikaw and his group, mesoporous anatase Ti02 nanopowder was synthesized at 130°C for 12 h (see Table 2) [106]. Titanium (IV) butoxide (Ci6H3604Ti) was mixed in a 1 1 molar ratio with acetylacetone (CH3-CO-CH2-CO-CH3) to slowdown the hydrolysis and the condensation reactions. 40 ruL of distilled water was added in the solution and stirred at room temperature for 5 min. The solution was put into a Teflon-hned stainless steel autoclave while stirring and heated at 130°C for 12 h. The final product was naturally cooled to room temperature and washed with 2-propanol and distilled water. This was then dried followed by drying at 100°C for 12 h. The synthesized sample had a narrow pore size distribution with an average pore diameter of about 3 nm. The specific surface area of the sample was about 193 m /g. Mesoporous anatase TiOz nanopowders showed higher photocatalytic activity than the nanorods, nanofibers and commercial 7702 nanoparticles. 

According to these Equations 8.52-8.54, target nitrides were preferentially obtained in the form of nanopowders and nanofibers (excluding titanium nitride), the particles of which were commensurate to the particles of the starting titanium powder. The topography of its surface and the particle size are shown in Figure 8.10. It can be seen that the particle size of the TiN powder is 1-20 pm, and these particles are microcrystalline. 

To obtain the titanium nitride nanopowder, it is of interest to use only titanium-containing halide rather than a mixture of titanium powder with ammonium... 

The goai of this work is to investigate the acquisition of the titanium nitride nanopowder in the ammonium hexafluorotitanate - sodium azide system. In this case, the stoichiometric equation of the chemical reaction is as follows ... 

Sunscreens and cosmetics Titanium and zinc oxide nanopowders are widely used in sunscreens, creams and lotions. 

Cryogenic milling is a top-down approach to prepare nanoscale titanium of 100-300 nm size. Several mechanical deformations of large grains into nltra fine powder and degassing lead to nanopowder with improved characteristics. 

Tantalum- and niobium-doped (up to 10 atom%) titania nanopowders as base materials for thick film gas sensors were synthesized recently (Traversa et al., 2000). The source of titanium, Ti(0 Pr)4, was dissolved in absolute ethanol and the solution added dropwise into a 1 1 ethanol/water solution to obtain a precipitate. On calcination, the amorphous precipitates converted to the crystalline forms of titania, as also other phases, as shown in Table 7-2. 

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