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What are the properties of titanium diboride in structural and functional materials?
1. It is a structural material. Because of its high strength, hardness, and durability, titanium boride is a good choice for making tools. You can add it to other composite materials.
2. Functional materials. Its resistance is comparable to that of iron. Therefore, its use in the development of functional materials can be very beneficial. Because of its electrical characteristics, titanium boride can be transformed into flexible PTC material.
The most current techniques for preparation of titanium diboride material include: carbothermal, self-propagating higher temperature and synthesis methods, mechanochemical and reaction methods, vapor deposition and ball milling.
Carbothermic method of reduction
The raw materials used to synthesize titanium diboride powder are titanium oxide and boron dioxides. Carbon black is also used as a reducing agent. Long-term high temperature carbon reduction treatment in carbon tube furnaces uses carbon black. This is an industrial process. It has the disadvantage of having a very large particle size, and high impurity.
SHS is self-propagating at high temperatures.
The general idea is to first press the material to be reacted to a block and to then ignite one end to inflame the reaction. Due to the enormous heat generated by the reaction, the reactions of the other materials cause them to react and a flame-like phenomenon is produced. As the combustion wave moves forward, the mixture of raw materials is converted into final products. Because of the high product purity due to self-purification by the self propagating high-temperature synthesizing process, it is simple to make further sintered powder. External energy consumption is also low. Combining other technical means can result in dense titanium diboride being prepared directly.
Method for Mechanochemical Reactions (MR).
Reactant powder is put in high-energy ballmills. This causes the powder to be repeatedly crushed by the shearing action of the grinding balls. Through the violent friction and collision with the ball milling medium, the mechanical energy can be transformed into chemical energy. The reactants are synthesized by the reaction of these reactions. The advantages of the mechanochemical reactions method are that it is much more cost-effective than the previous two methods of making titanium diboride.
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