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The Characteristics of Titanium Diboride Ceramics And Preparation Method of Titanium Diboride

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Metal borides, among many other compounds, have better performance at high temperature than metal carburides. As an example, titanium diboride (TiB2) The cermet product is more suitable for use in high temperature, high corrosion conditions.
The properties of titanium diboride both as a structural material and a functional material:

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 a very useful material for functional materials because the resistivity of titanium 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 temperature, the mechanochemical method, and ball milling.

Reduce carbothermic toxicity using a reduction method
Using titanium oxide and boron dioxide as raw materials, using carbon black as the reducing agent in a high-temperature tube carbon furnace for a long period of time, the purity is determined by the powder of the original raw material. 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 is to compress the raw material mixture that will be reacted and ignite one end of the resulting block. The reaction releases a huge amount of heat, which causes adjacent materials to react. Eventually a combustion waves 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, the high-temperature synthesis self-propagating process produces a high-purity product. It is then easy to sinter the powder and the external energy is consumed is low. 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 pressure and shearing from the grinding 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 has advantages such as low synthesis temperatures, a wide range of raw material sources, and low costs.

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