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 temperatures than do metal carbides. As an example, 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 materials and as 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 therefore very useful to use titanium boride in functional materials. 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
In a carbon tube oven, using titanium and boron oxids as raw materials with carbon black as the reducing agent for a long time, the purity of the titanium diboride is determined by the purity in the powder of the raw materials. This process is widely used in industrial production. The powder obtained from this process has large particles and high impurity levels.

Self-propagating heat synthesis (SHS).
In general, this method involves pressing the raw material mixture into a solid block. One end of the solid block is then ignited to ignite a reaction. 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 the finished product. Because of the self purifying effect of the self propagating high-temperature synthesizing process, the obtained powder can be easily sintered and external energy consumption is minimal. 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 balls. 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 a low cost.

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