TITANIUM NITRIDE
Titanium nitride
CAS: 25583-20-4
Molecular Formula: NTi
TITANIUM NITRIDE - Names and Identifiers
| Name | Titanium nitride |
| Synonyms | TIN B TIN A TIN C TiN-HP Kaier 0824 nitridotitanium TITANIUM NITRIDE Titanium nitride ReactHeat Blue 2 Titanium nitride (TiN) |
| CAS | 25583-20-4 |
| EINECS | 247-117-5 |
| InChI | InChI=1/N.Ti/rNTi/c1-2 |
| InChIKey | NRTOMJZYCJJWKI-UHFFFAOYSA-N |
TITANIUM NITRIDE - Physico-chemical Properties
| Molecular Formula | NTi |
| Molar Mass | 61.87 |
| Density | 5.24 g/mL at 25 °C (lit.) |
| Melting Point | 2930 °C (lit.) |
| Boling Point | 0°C |
| Flash Point | 0°C |
| Water Solubility | Soluble in aqua regain. Partly soluble in water. |
| Solubility | it is soluble in aqua regia on boiling. |
| Appearance | Dark yellow solid |
| Specific Gravity | 5.24 |
| Color | Yellow |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong acids. |
| MDL | MFCD00049596 |
| Physical and Chemical Properties | Crystal structure: cube molecular formula: TiN Cas No: 25583-20-4 molecular weight: 61.874 density: 5.22g/cm3 melting point: 2930 ℃(5310 °F; 3200 K) odor: odorless solubility: slightly soluble in hot aqua regia, concentrated sulfuric acid and hydrogen fluoride, insoluble in water Vickers hardness: 2400 Elastic modulus: 251GPa Thermal conductivity: 19.2W/(m · °C) Thermal expansion coefficient: 9.35 × 10-6K-1 Superconducting transition temperature: 5.6 k Magnetic susceptibility: 38 × 10-6emu/mol |
| Use | Can be used as conductive materials such as electrodes and electrical contacts for molten salt electrolysis |
TITANIUM NITRIDE - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| UN IDs | UN3178 |
| WGK Germany | 3 |
| RTECS | XR2230000 |
| TSCA | Yes |
| Hazard Class | 4.1 |
| Packing Group | III |
TITANIUM NITRIDE - Nature
Open Data Verified Data
titanium nitride is a golden yellow crystalline powder. Its crystal structure is a cubic structure. Relative density 5. 43, melting point 3290 ℃, Mohs hardness 8~9, thermal conductivity 29. 1W/(m.K), the coefficient of thermal expansion 9. 35 × 10-s ℃-1, resistivity 25u.cm. Insoluble in water, slightly soluble in aqua regia, nitric acid, hydrofluoric acid. It has good high temperature strength, high fracture strength, high hardness, excellent friction and wear resistance, thermal shock resistance and chemical corrosion resistance.
Last Update：2024-01-02 23:10:35
TITANIUM NITRIDE - Preparation Method
Open Data Verified Data
titanium metal was placed in a heating furnace, heated to 1000 to 1400 ° C. In an ammonia gas stream, and reacted to directly obtain titanium nitride. Alternatively, titanium dioxide and carbon are mixed well in a certain proportion, put into a heating furnace, and heated to 1250 ° C. In a nitrogen gas stream to prepare titanium nitride by reductive nitridation. A titanium nitride coating can be obtained by vapor deposition from a mixture of titanium tetrachloride, nitrogen and hydrogen.
Last Update：2022-01-01 09:05:30
TITANIUM NITRIDE - Use
Open Data Verified Data
used as powder metallurgy, fine ceramic raw material powder, conductive materials and decorative materials, widely used in high temperature resistance, wear resistance and aerospace and other fields. The material has good conductivity and can be used as conductive materials such as electrodes and electrical contacts for molten salt electrolysis. It can also be used as an additive in hard cutting tools.
Last Update：2022-01-01 09:05:31
TITANIUM NITRIDE - Reference Information
| synthetic ceramic material | titanium nitride is abbreviated as TiN. it is a synthetic ceramic material with extremely hard and its hardness is close to diamond. Titanium nitride is chemically stable at room temperature but will be corroded by hot concentrated acid, and will be oxidized at 800°C and normal pressure. With infrared (IR) reflectance properties, the reflectance spectrum is similar to that of gold (Au), so it is yellowish. Depending on the substrate material and the surface finish of the substrate, the relative friction coefficient of titanium nitride is about 0.4-0.9 (no lubrication). Its typical crystal structure is sodium chloride type (relative stoichiometry of elements is about 1:1), and the thermodynamic stability coefficient x of the TiNx complex is 0.6-1.2. The world's first super thermal insulation material is made of titanium nitride film cooled to close to absolute zero, and its thermal insulation performance will increase by 100,000 units. Three-dimensional structure of titanium nitride molecules The above information is edited and sorted out by luyue. |
| overview | titanium nitride, golden yellow cubic crystal. Molecular weight 61.89. Melting point 2950 ℃. Density 5.43. Slightly soluble in hydrofluoric acid, aqua regia, nitric acid, insoluble in water. It has high melting point, high strength, high hardness, acid and alkali corrosion resistance, wear resistance, high temperature chemical stability and excellent electrical and thermal conductivity. High-speed steel cutting tools covered with titanium nitride film can reduce tool wear, increase chip speed and prolong service life. It is also widely used as watch cases, watchbands and other gold-like alloy coatings. Titanium nitride whiskers are used to reinforce metal-based and ceramic-based composites. It is prepared by the reaction of titanium and nitrogen at 1 200 ℃. |
| physical and chemical properties | crystal structure: cube molecular formula: TiN Cas No: 25583-20-4 molecular weight: 61.874 density: 5.22g/cm3 melting point: 2930 ℃(5310 °F; 3200 K) odor: odorless solubility: slightly soluble in hot aqua regia, concentrated sulfuric acid and hydrogen fluoride, insoluble in water Vickers hardness: 2400 elastic modulus: 251GPa thermal conductivity: 19.2W/(m °C) thermal expansion coefficient: 9.35 × 10-6 K -1 superconducting transition temperature: 5.6 k magnetic susceptibility: +38 × 10-6 emu/mol |
| Use of titanium nitride | 1. Titanium nitride coatings are widely used on metal edges to maintain the corrosion resistance of mechanical molds, such as drill bits and milling cutters, and their life is often improved by increasing three or more factors. 2. Because of its metallic luster, it is often used as clothing and car decoration. As the outer coating, nickel (Ni) or chromium (Cr) is usually used as the plated substrate, packaging pipes and door and window hardware. 3. The coating is also used in aerospace and military aspects, as well as to protect the sliding surfaces of the suspension devices of bicycles and motorcycles, and even the damping shafts of remote-controlled toy cars. 4. The material is non-toxic and conforms to FDA regulations, so it is also commonly used in medical devices, such as maintaining the sharpness of the edges of scalpel blades and orthopedic bone saws, or directly as implanted prostheses (especially hip replacement implants) and other medical implants. 5. Titanium nitride film can be used in the field of microelectronics as a conductive barrier layer between active devices and metal contacts. When the film is diffused into the metal silicon, its conductivity (30-70 μΩ · cm) is sufficient to form a good conductive connection. 6. This special "barrier metal" also has the chemical or mechanical properties of ceramics. This process is widely used in current 45nm chip designs to improve the performance of transistors. In the battery field, by combining titanium nitride with a gate dielectric layer (e. g., HfSiO), compared to standard SiO2, the dielectric constant can be improved, the gate length can be scaled down, the leakage is low, the drive current is higher, the same or better threshold voltage. 7. The high biological stability extends the application field of the alloy to bioelectronic electrodes, such as subretinal prosthesis projects and microelectromechanical systems (bio-microelectromechanical) in biomedicine, so that smart implants or In vivo biosensors can withstand severe body fluid corrosion. |
| synthesis method | the most commonly used titanium nitride thin film synthesis method is physical vapor deposition (PVD, usually sputter deposition, cathodic arc deposition or electron beam heating) and chemical vapor deposition (CVD). Both methods are to sublimate pure titanium and react with nitrogen in a high-energy vacuum environment. 1. The titanium nitride powder, the reaction product of nitride, is sintered in pure nitrogen at 1200 ° C. by compressing the powdered titanium metal to an appropriate density from the heat released by the chemical reaction between the metal and the gas, as follows: 2Ti + N2 = 2TiN. 2. At high temperature, the mixture of titanium tetrachloride-nitrogen reacts with the mixture of ammonia-hydrogen, as follows: 6TiCl4 32NH3 = 6TiN 24NH4Cl N2. 3. The titanium-hydrogen-nitrogen mixture is heated to a high temperature, passed through graphite, and then cooled and deposited on the base material to form a film. |
| store | avoid overheating. Although chemically stable, the alloy decomposes in hot caustic or superheated water vapor to escape hydrogen and ammonia. Generally, titanium compounds (including titanium nitride) are easily reduced at high temperature in a nitrogen atmosphere to form impure titanium nitride. |
| use | can be used as conductive materials such as electrodes and electrical contacts for molten salt electrolysis |
| production method | 1. put metal titanium into a heating furnace, titanium nitride is directly obtained by heating to 1000~1400 ℃ in nitrogen gas stream. Or mix titanium dioxide and carbon in a certain proportion, put it in a heating furnace, and heat it to 1250 ℃ in a nitrogen gas stream to reduce nitridation to obtain titanium nitride. Using vapor deposition method, titanium nitride coating can be obtained from the mixed gas of titanium tetrachloride, nitrogen and hydrogen. 2. The mixed gas of H2 and N2 is introduced into the evaporator of titanium tetrachloride, and the tungsten wire coil is energized and heated in the gas flow, that is, titanium nitride crystals are precipitated (a transparent quartz tube with an inner diameter of 50mm is used as a reaction tube). Experiments show that when the concentrations of nitrogen and hydrogen are equal, the concentration of titanium tetrachloride is 0.3%, and the temperature of tungsten wire is 1300~1500 ℃, the precipitation rate of titanium nitride is the largest. 3. Heat the mixed gas of titanium tetrachloride and nitrogen and the mixed gas of ammonia and hydrogen to above 700 ℃ to react them. Install a flask at the reaction outlet to collect the product. The by-product ammonium chloride in the product can be removed by heating at 350 ℃ for more than ten minutes in an inert gas flow to obtain black titanium nitride powder. 4. Direct synthesis method: titanium metal is put into a heating furnace and heated to 1000~1400 ℃ in nitrogen gas flow to directly synthesize titanium nitride. 5. Titanium dioxide reduction method fully mixes titanium dioxide and carbon in proportion, puts them into a heating furnace, and heats them to 1250 ℃ for reduction and nitriding to obtain titanium nitride. Crushed fine products. Titanium nitride can also be made by nitriding titanium tetrachloride with methane, nitrogen and hydrogen. |
| EPA chemical information | information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-10 22:29:15
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