Hexagonal crystals
Titanium diboride is a hexagonal crystal. 12
Titanium diboride (TiB2) has the crystal structure of hexagonal aluminum boride (AlB2) and appears as gray or gray-black hexagonal crystals or powders. This compound exhibits excellent comprehensive properties, including excellent thermal stability, oxidation resistance and electrical conductivity. Titanium diboride has a high hardness, a melting point between 2900 and 3225°C, an oxidation resistance temperature of up to 1000°C in air, and is stable in HCl and HF acids. Due to its excellent physical and chemical properties, titanium diboride is widely used in many fields, including but not limited to the preparation of composite ceramic products, molten metal crucibles, the manufacture of electrolytic cell electrodes, and hot-pressed ceramic products requiring good electrical conductivity.
In addition, the preparation methods of titanium diboride include carbothermal reduction, self-propagating high-temperature synthesis (SHS) and mechanochemical reaction (MR). These methods have their own characteristics. For example, the carbon thermal reduction method is a process that is widely used in industrial production, but the resulting powder particles are large in size and have a high impurity content. The self-propagating high-temperature synthesis method has high product purity and low external energy consumption due to the self-purification effect of the process. The mechanochemical reaction method has the advantages of low synthesis temperature, wide source of raw materials and low cost.