What are the preparation methods of titanium diboride powder?

Preparation of titanium diboride

The current methods for preparing titanium diboride raw materials mainly include carbothermic reduction method, self-propagating high-temperature synthesis method, mechanochemical reaction method, vapor deposition method, ball milling method and so on. 1.

Carbothermic reduction method

Using titanium and boron oxides as raw materials and carbon black as reducing agent, long-term high-temperature carbon reduction treatment in a carbon tube furnace, the purity of the synthesized titanium diboride powder depends on the purity of the raw material powder. This method is a process often used in industrial production. The disadvantage is that the obtained titanium diboride powder has a large particle size and a high impurity content.

2. Self-propagating high temperature synthesis (SHS)

This method is generally to press the raw material mixture to be reacted into a block, and then ignite one end of the block to ignite the reaction. The huge heat released by the reaction causes the adjacent substances to react, and finally forms a combustion wave propagating at a speed v. Finally, as the combustion wave advances, the raw material mixture is transformed into the final product. The self-propagating high-temperature synthesis method combined with other special technical means can directly prepare dense titanium diboride materials.

3. Mechanochemical reaction method (MR)

In this method, the reactant powder is put into a high-energy ball mill, and the powder is repeatedly deformed and broken under the squeezing and shearing action of the grinding ball. The violent friction and collision of the ball milling media convert mechanical energy into chemical energy, thereby synthesizing the required reactants. Compared with the first two methods for preparing titanium diboride, the mechanochemical reaction method has the advantages of low synthesis temperature, wide source of raw materials and low cost.

Overview of titanium diboride

Titanium diboride powder is gray or gray-black, with a hexagonal (AlB2) crystal structure, with a melting point of 2980°C and high hardness. The anti-oxidation temperature of titanium diboride in the air can reach 1000℃, and it is stable in HCl and HF acid.

Titanium diboride (TiB2) is an extremely hard ceramic with excellent mutation, oxidation stability and wear resistance. Titanium diboride (TiB2) is an extremely hard ceramic used for special ballistic armor applications. In addition, unlike most ceramic parts, it is an extremely hard ceramic. Conductive. It is also a reasonable electrical conductor, so it can be used in aluminum smelting and can be formed by EDM. Titanium diboride TiB2 powder properties: 1. High melting point 2. High hardness 3. Wear resistance 4. Acid resistance 5. Excellent electrical conductivity 6. High thermal conductivity.

Titanium boride (TiB2) is the most stable compound of boron and titanium. It has a C32 structure and is combined in the form of valence bonds. It is a metalloid compound of the hexagonal system. The structural parameters of the complete crystal are: a is 0.3028 nm, and C is 0.3228 nm. In the crystal structure, the plane of boron atoms and the plane of titanium atoms alternately form a two-dimensional network structure, in which B is covalently bonded with the other three Bs, and an extra electron forms a large π bond. This graphite-like layered structure of boron atoms and Ti outer electrons determines the good conductivity and metallic luster of TiB2, and the Ti-B bond between the surface of boron atoms and the surface of titanium atoms determines the high hardness and brittleness.

Used in many compounds, metal borides have better high temperature performance than metal carbides. For example, diboride (TiB2) cermet products are more suitable for use under high temperature and high corrosion working conditions than titanium carbide (TiC) and tungsten carbide (WC) cermet products. The titanium diboride powder is gray (or gray-black). It ranks sixth among the top ten materials with the highest melting point in the world, and its anti-oxidation temperature in the air can reach 1100°C. As a new type of ceramic material, it has very excellent physical and chemical properties, in addition to high melting point, high hardness, chemical stability, electrical and thermal conductivity, and mechanical and mechanical properties at high temperatures are very good. very talented.

Titanium diboride application

Titanium diboride is mainly used to prepare composite ceramic products. Due to its ability to resist molten metal corrosion, it can be used to manufacture molten metal crucibles and electrolytic cell electrodes. Titanium diboride (TiB2) is a hard material with high strength, high wear resistance, high density, plus high elastic modulus and high compressive strength, so it must be used for armor parts. It is not affected by most chemical reagents, and has excellent stability and wettability in liquid metals such as zinc and zinc. aluminum. This and its high electrical conductivity have led to its use in the Hall-Elliott electrolytic cell for the production of aluminum. TiB2 is also used as a crucible for molten metals due to its high hardness, extremely high melting point and chemical inertness, and is a candidate material for many applications.

Ballistic armor: The combination of high hardness and medium strength makes it attractive to ballistic armor. However, its relatively high density and the difficulty of processing molded parts make it less attractive than other ceramics.

Aluminum smelting: The chemical inertness and good conductivity of TiB2 make it the cathode of Hall-Helo battery for primary aluminum smelting. It can also be used as a crucible and metal evaporation boat to process molten metal.

Other uses: high hardness, medium strength and good wear resistance make titanium diboride a candidate material for other materials and tool seals, wearing parts and composite materials. TiB2 combines with other major oxide ceramics to form composite materials, where the presence of the material helps to improve the strength and fracture toughness of the matrix.

The current uses of TiB2 are almost limited to special applications in the fields of impact-resistant armor, cutting tools, crucibles, neutron absorbers, and wear-resistant coatings.

TiB2 is widely used as a vaporizing agent for vaporizing aluminum. In the aluminum industry, due to its implantability, low solubility in molten aluminum and good electrical conductivity, it is a selective material that can be used to cast aluminum alloys as an inoculant for grain refinement.

TiB2 films can be used to provide wear resistance and corrosion resistance to inexpensive or strong substrates. Dispersibility and application effect of titanium diboride TiB2 powder. Therefore, the titanium diboride TiB2 powder should be sealed in a vacuum package and stored in a cool and dry room. The titanium diboride TiB2 powder should not be exposed to the air. In addition, avoid using TiB2 powder under pressure.

Titanium Diboride Price

The price of titanium diboride will vary randomly with the production cost, transportation cost, international situation, exchange rate and supply and demand of titanium diboride market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for titanium diboride, please feel free to send an inquiry to get the latest price of titanium diboride.

Suppliers of Titanium Diboride

As a global titanium diboride powder supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides), single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.