Preparation method and application of titanium diboride powder
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Overview of Titanium Diboride TiB2 powder
Titanium diboride TiB2 powder is gray or gray-black, has a hexagonal (AlB2) crystal structure, a melting point of 2980 ° C, and high hardness. The oxidation resistance temperature of titanium diboride in air can reach 1000℃, and it is stable in HCl and HF acid.
Titanium diboride (TiB2) is an extremely hard ceramic with excellent mutation resistance, oxidation stability and wear resistance. Titanium diboride (TiB2) is an extremely hard ceramic used for special ballistic armor applications. Also, 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 shaped 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 bound by a valence bond. 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 planes of boron atoms and the planes of titanium atoms alternate to form a two-dimensional network structure, in which B is covalently bonded to the other three Bs, and an extra electron forms a large π bond. The graphite-like layered structure of the boron atoms and the outer electrons of Ti determines the good electrical conductivity and metallic luster of TiB2, while the Ti-B bond between the surface of the boron atom and the surface of the titanium atom determines its high hardness and brittleness.
Metal borides used in many compounds have better high temperature properties than metal carbides. For example, diboride (TiB2) cermets are more suitable for high temperature, high corrosion conditions than titanium carbide (TiC) and tungsten carbide (WC) cermets. Titanium diboride powder is gray (or gray-black). It ranks sixth in the top ten materials with the highest melting point in the world, and the anti-oxidation temperature in air can reach 1100 °C. As a new type of ceramic material, it has excellent physical and chemical properties, in addition to high melting point, high hardness, good chemical stability, good electrical and thermal conductivity, and very good mechanical and mechanical properties at high temperatures. very talented.
At present, the methods for preparing titanium diboride TiB2 raw materials mainly include carbothermal reduction method, self-propagating high temperature synthesis method, mechanochemical reaction method, vapor deposition method, ball milling method, etc.
1. Carbothermal reduction method
Using titanium and boron oxide as raw materials, carbon black as reducing agent, and 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 generally compresses the raw material mixture to be reacted into a block, and then ignites one end of the block to ignite the reaction. The enormous heat released by the reaction causes the adjacent substances to react, eventually forming a burn wave propagating with velocity v. Finally, as the combustion wave progresses, the feedstock mixture is transformed into the final product. The self-propagating high temperature synthesis method combined with other special technical means can directly prepare the dense titanium diboride TiB2 material.
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 extrusion and shearing action of the grinding ball. Vigorous friction and collision of the ball milling media convert mechanical energy into chemical energy to synthesize the desired 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.
Titanium diboride TiB2 powder application
Titanium diboride TiB2 powder is mainly used to prepare composite ceramic products. Due to its ability to resist corrosion of molten metal, 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 and high density, plus high elastic modulus and high compressive strength, so it must be used for armor parts. Unaffected by most chemical agents, it has excellent stability and wettability in liquid metals such as zinc and zinc. aluminum. This and its high electrical conductivity lead to its use in Hall-Elliott electrolytic cells for the production of aluminium. 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 moderate strength makes it attractive for ballistic armor. However, its relatively high density and difficulty in machining shaped parts make it unattractive compared to other ceramics.
Aluminum smelting: The chemical inertness and good electrical conductivity of TiB2 make it a cathode for Hall-Helo cells for primary aluminum smelting. Can also be used as crucible and metal evaporation boat to handle molten metal.
Other uses: High hardness, moderate strength and good wear resistance make titanium diboride a candidate for other materials and tool seals, consumables and composites. TiB2 combines with other major oxide ceramics to form composites, the presence of which contributes to the strength and fracture toughness of the matrix.
The current use of titanium diboride TiB2 powder is almost limited to special applications in the fields of impact armor, cutting tools, crucibles, neutron absorbers and wear resistant coatings.
Titanium diboride TiB2 powder is widely used as a vaporizing agent for vaporizing aluminum. In the aluminum industry, it is a selective material for casting aluminum alloys as an inoculant for grain refinement due to its implantability, low solubility in molten aluminum, and good electrical conductivity.
Titanium diboride TiB2 powder films can be used to provide abrasion and corrosion resistance to inexpensive or robust substrates. Dispersibility and application effect of titanium diboride TiB2 powder Therefore, titanium diboride TiB2 powder should be sealed in a vacuum package and stored in a cool and dry room. Titanium diboride TiB2 powder should not be exposed to air. Also, avoid using TiB2 powder under pressure.
Titanium Diboride TiB2 Powder Price
The price of titanium diboride TiB2 powder will change randomly with production cost, transportation cost, international situation, exchange rate and supply and demand of titanium diboride TiB2 market. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for Titanium Diboride TiB2, please feel free to send an inquiry to get the latest price of Titanium Diboride TiB2 powder.
Supplier of Titanium Diboride TiB2 Powder
As a global supplier of titanium diboride TiB2 powder, 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.
|Titanium Boride Properties|
|Other Names||TiB2, TiB2 powder, titanium boride powder|
|Melting Point||2980 °C|
|Solubility in H2O||N/A|
|Thermal Expansion Coefficient||8.1×10-6m/m.k|
|Exact Mass||69.96656 Da|
|Titanium Boride Health & Safety Information|
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