carbon(-4) anion
Zirconium carbide
CAS: 12070-14-3
Molecular Formula: CZr
carbon(-4) anion - Names and Identifiers
| Name | Zirconium carbide |
| Synonyms | carbon(-4) anion ZirconiuM carbid Zirconium carbide zirconium(+4) cation zirconiumcarbide(zrc) Zirconium Carbide, -325 Mesh Zirconium carbide target (ZrC) Zirconium carbide powder (ZrC) Zirconiumcarbidemicronblackpowder Zirconium carbide (metals basis excluding Hf), Hf |
| CAS | 12070-14-3 |
| EINECS | 235-125-1 |
| InChI | InChI=1/C.Zr/q-4;+4 |
| InChIKey | MHMXYYDKIQTOHA-UHFFFAOYSA-N |
carbon(-4) anion - Physico-chemical Properties
| Molecular Formula | CZr |
| Molar Mass | 103.23 |
| Density | 6.73g/mLat 25°C(lit.) |
| Melting Point | 3540°C |
| Boling Point | 5100°C |
| Water Solubility | Soluble in concentrated sulfuric acid, hydrofluoric acid and nitric acid. Insoluble in water. |
| Appearance | powder |
| Specific Gravity | 6.73 |
| Color | Gray |
| Exposure Limit | ACGIH: TWA 5 mg/m3; STEL 10 mg/m3NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 |
| Physical and Chemical Properties | A dark gray, metallic, cubic crystal. Friable nature. Melting point 3540 °c. Boiling Point 5100 °c. Apparent density 6.70g/cm3. Mohs hardness 8~9. Insoluble in cold water and hydrochloric acid. Soluble in hydrofluoric acid and hot concentrated sulfuric acid containing nitric acid or hydrogen peroxide. It reacts with chlorine gas to form zirconium tetrachloride at high temperature. 700 C, the combustion of zirconia in air. Do not react with water. |
| Use | Mainly used as abrasive, can also be used as a raw material for Cemented carbide |
carbon(-4) anion - Risk and Safety
| Risk Codes | R11 - Highly Flammable R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S16 - Keep away from sources of ignition. S27 - Take off immediately all contaminated clothing. S33 - Take precautionary measures against static discharges. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 3178 4.1/PG 3 |
| WGK Germany | 3 |
| RTECS | ZH7155000 |
| TSCA | Yes |
| Hazard Class | 4.1 |
| Packing Group | III |
carbon(-4) anion - Nature
Open Data Verified Data
zirconium carbide is a gray, glossy cubic crystalline powder. Lattice constant. 0. 46983nm, melting point 3532 ℃, Boiling Point 5100 ℃, relative density 6. 73. Mohs hardness 8~9, microhardness 2700kg/mmz, elastic modulus 3. 48 x 10s N/mm2, coefficient of thermal expansion 6. 73 × 10-E/K, heat of formation -196. 8kJ/mol, specific heat capacity 37. 8J/(mol-K), resistivity 42u.cm. Insoluble in hydrochloric acid, soluble in nitric acid and hydrofluoric acid, also soluble in hydrofluoric acid and hot sulfuric acid containing hydrogen peroxide, can react with chlorine to produce zirconium tetrachloride at high temperature, oxidation to zirconia is possible above 700 °c.
Last Update：2024-01-02 23:10:35
carbon(-4) anion - Preparation Method
Open Data Verified Data
with oxidized hydrazine and charcoal as raw materials. The two were mixed, placed in a graphite crucible of a carbonization furnace, and heated to 2400 ° C. In a hydrogen atmosphere to react, and zirconium carbide was obtained. Can also be fully mixed with zirconium dioxide and carbon black, pressure molding, in the induction heating of the graphite crucible, the same in the hydrogen atmosphere heated to 1800 deg C, add the carbon black iY ~ 2%, the zirconium carbide was prepared by annealing at 1700 to 1900 ° C. In vacuum. Alternatively, zirconium carbide can be prepared by mixing zirconium oxide and magnesium metal into a recyclable reactor, continuously feeding methane gas and raising the temperature to 750 ° C., and then pickling with hydrochloric acid to remove by-products.
Last Update：2022-01-01 09:05:47
carbon(-4) anion - Use
Open Data Verified Data
zirconium carbide is an important high temperature structural material with high melting point, high strength and corrosion resistance. It can be used as an electrode, a refractory crucible, and a cathode electron-emitting material. For multi-alloy to improve mechanical strength, but also the production of metal zirconium, zirconium tetrachloride raw materials.
Last Update：2022-01-01 09:05:48
carbon(-4) anion - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| high temperature structural material | zirconium carbide chemical formula ZrC is an important high-temperature structural material with high strength, good corrosion resistance and chemical stability, appearance is gray-black with metallic luster cubic crystal, its melting point as high as 3540 deg C, boiling point of 5100 deg C, the relative density of 6.73. Insoluble in cold water, hydrochloric acid, soluble in oxidizing acid, aqua regia and hydrofluoric acid, soluble in molten caustic. Although the red heat and water does not decompose, red heat when burning in oxygen, fine powder is easy to cause sparks, and chlorine, bromine, iodine and nitrogen, halide or nitride formation. ZrC powder was obtained by reduction of zirconia with carbon, and then formed and sintered to produce ZrC ceramics, which can be used as electrode, refractory crucible and cathode electron emission material. ZrC coating can be prepared by sponge zirconium iodination method, sponge Zirconium chloride method, sponge zirconium bromide method and zirconium tetrachloride powder method. ZrC coatings with different properties can be obtained by selecting different process conditions. The low-density loose ZrC coatings have good thermal stress resistance and thermal insulation performance, and can be used as thermal insulation materials, can be used as a protective coating. Since the 1970s, scientists from the United States, Germany and Japan have carried out the preparation and irradiation properties of ZrC coatings. ZrC coatings are being intensively studied and widely used in the aerospace and atomic industries. In the atomic energy industry, SiC coating is usually used to coat the fuel particles in high temperature gas-cooled reactor, but the mechanical properties of SiC coating will decline rapidly due to thermal decomposition and phase transition from β-SiC to α-SiC above 1700 ℃; in order to further develop and utilize the high temperature gas-cooled reactor, ZrC coating was used to replace the traditional SiC coating to prepare new coated fuel particles. The ZrC coating has low neutron absorption cross section and strong ability to block the release of radioactive fission products, the diffusion coefficient of 1600 Cs in ZrC coating is 2 orders of magnitude lower than that in SiC coating at 137 ℃. The coated fuel particles prepared by ZrC coating have excellent properties and can be applied at higher temperatures. (2016-01-13) |
| Application | zirconium carbide is a kind of high melting point material with high hardness and excellent high temperature refractory material. A material used as a solid propellant in rocket motors. For the production of alloy steel. It is also a raw material for the production of metal zirconium and zirconium tetrachloride, as well as a promising fine ceramic material. used as white-heat lamp filament. Now mainly used as abrasive. It can also be used as a raw material for Cemented carbide. |
| production method | carbon reduction method zirconium carbide is prepared by reducing zircon with carbon in an electric arc furnace; zirconium carbide can also be obtained by reduction of zirconia with carbon in an induction heating vacuum furnace. Zirconium carbide is prepared by chemical vapor deposition of zirconium tetrachloride and hydrocarbon reacting at 900~1400 ℃ in hydrogen atmosphere. |
Last Update：2024-04-10 22:29:15
