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titanium diboride (TiB2)
The cermet product is more suitable for use in high temperature, high corrosive conditions.
The properties of titanium diboride both as structural and functional materials
1. Structure materials. Due to its high strength, titanium boride can be used for tools, wire drawing films, sandblasting materials, and other hard tooling materials. It can also be added to composite materials.
2. Functional materials. It is useful to use titanium boride in functional materials because its resistivity is similar to pure iron. Titanium boride’s electrical properties can be used to create flexible PTC material.
There are many methods to prepare titanium diboride. These include the carbothermal method of reduction, the self-propagating method at high temperatures and synthesis, the mechanochemical method, and ball milling.
Reduce carbothermic toxicity using a reduction method
The quality of titanium diboride powder synthesized depends on the quality and purity of raw material powder. This process is widely used in industrial production. The powder obtained from this process has large particles and is high in impurities.
Self-propagating heat synthesis (SHS).
In general, this method consists of pressing the raw material mixture that is to be reacted to a block. One end of the block will then be ignited to ignite the reactions. The reaction releases a huge amount of heat, which causes adjacent materials to react. Eventually, a combustion-wave spreading at speed v forms. As the combustion wave moves forward, the raw materials are transformed into a final product. Because of the self purifying effect of the self propagating high temperature synthesis, the product purity increases, and it is easier to sinter the powder obtained. With the use of other technical means and special techniques, it is possible to prepare dense titanium diboride directly.
Methode de Reaction Mécanochimique (MR).
The powder reactant is placed into a high-energy mill and is repeatedly deformed under the action from the squeezing or shearing ball. The ball milling medium generates chemical energy through the violent friction. Comparing the two first methods of preparing titanium dioxide, the mechanochemical reactions method is more cost-effective, has a wide range of raw material sources, and produces titanium diboride at a low temperature.
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