Zirconium diboride
Zirconium boride
CAS: 12045-64-6
Molecular Formula: B2Zr
Zirconium diboride - Names and Identifiers
| Name | Zirconium boride |
| Synonyms | ZIRCONIUM BORIDE Einecs 234-963-5 Zirconium boride Zirconium diboride Zirconium diboride (zrb2) ZIRCONIUM DIBORIDE, GRADE B, A PRODUCT OF H.C. STARCK zirconium boride (zrb2) zirconium boride Zirconium boride(ZrB2) |
| CAS | 12045-64-6 |
| EINECS | 234-963-5 |
| InChI | InChI=1/B2.Zr/c1-2;/q+2;-2/rB2Zr/c1-2-3-1 |
Zirconium diboride - Physico-chemical Properties
| Molecular Formula | B2Zr |
| Molar Mass | 112.85 |
| Density | 6,1 g/cm3 |
| Melting Point | 3100-3500°C |
| Water Solubility | It is insoluble in water. |
| Appearance | Grey crystal or powder |
| Exposure Limit | ACGIH: TWA 5 mg/m3; STEL 10 mg/m3NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 |
| Storage Condition | Room Temprature |
| MDL | MFCD00064648 |
| Physical and Chemical Properties | This product is gray crystal or powder, relative density 6.085, melting point of 324.5 ℃. High temperature resistance, high strength at room temperature and high temperature. Good heat shock resistance, small resistance, high temperature oxidation resistance. |
| Use | It can be used as aerospace high temperature resistant materials, wear-resistant and smooth solid materials, cutting tools, thermocouple protection tubes and electrode materials for electrolytic molten compounds. It is especially suitable for use as the surface of rolling bearing balls. |
Zirconium diboride - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | 20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | 36 - Wear suitable protective clothing. |
| UN IDs | UN3178 |
| WGK Germany | 3 |
| RTECS | ZH7150000 |
| TSCA | Yes |
| Hazard Class | 4.1 |
| Packing Group | III |
Zirconium diboride - Nature
Open Data Verified Data
Zirconium boride has three components: Zirconium boride, zirconium diboride and zirconium triboride. Only zirconium diboride is stable over a wide temperature range. Industrial production is mainly based on zirconium diboride. Zirconium diboride is hexagonal, gray crystal or powder, the relative density of 5.8, the melting point of 3040. High temperature resistance, high strength at room temperature and high temperature. Good heat shock resistance, small resistance, high temperature oxidation resistance.
Last Update：2024-01-02 23:10:35
Zirconium diboride - Preparation Method
Open Data Verified Data
There are four main preparation methods: ① metal zirconium and boron direct reaction I ② boron carbide method I ③ carbon reduction method; ④ vapor deposition method. Industrial synthesis of Zirconium boride mainly adopts ② and ③.
Last Update：2022-01-01 10:58:30
Zirconium diboride - Introduction
It's metallic. The resistance is slightly lower than that of metallic zirconium. After heating, it is stable in a large temperature range. Although the melting point is high, it can be sintered at a lower temperature. It is prepared by mixing metal zirconium with boron carbide and boron nitride and heating to 2000 ℃ in argon flow.
Last Update：2022-10-16 17:12:39
Zirconium diboride - Use
Open Data Verified Data
zirconium diboride material has high hardness, high melting point, thermal shock resistance, oxidation resistance, good electrical conductivity and good thermal conductivity, and can resist molten metal corrosion, for cutting tool components of electrical and electronic materials. In addition, zirconium diboride has good neutron control ability.
Last Update：2022-01-01 10:58:30
Zirconium diboride - Safety
Open Data Verified Data
The product is highly toxic, the maximum allowable concentration in the air is 2mg/m3, and the zirconium diboride is packaged in an iron drum, and the lid must be tight and firm. After poisoning, there were liver, kidney and nutritional disorders.
Last Update：2022-01-01 10:58:31
Zirconium diboride - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| ceramic materials | currently, materials capable of meeting extreme environmental requirements are mainly ultra-high temperature ceramic materials (UHTCs) composed of high melting point borides, carbides such as ZrB2,HfB2,ZrC,HfC and TaC. In these ultra-high temperature ceramic material systems, zirconium boride powder has the characteristics of low relative density (6.09g/cm3), high melting point (3245 ℃), high hardness (Mohs hardness is 9, microhardness is 22.1GPa), good thermal conductivity (thermal conductivity is 23~25W/(m K)), good electrical conductivity (normal temperature conductivity is about 1 × 108 S/m), etc, however, it has been widely used and paid attention to in the fields of high-temperature structural ceramic materials and ceramic matrix composites. |
| use | zirconium boride powder ultra-high temperature ceramics have been widely used as various high temperature structural and functional materials, such as turbine blades and magnetic fluid power generation electrodes in the aviation industry. As a material of zirconium boride powder for heat insulation, it is required to have excellent thermal shock resistance, but the existing zirconium boride powder cannot meet the requirements. Compared with the ceramic materials prepared by spherical particles, the ceramic materials prepared by the original particles are flaky and rod-shaped powder have better thermal shock resistance. It is generally used as a composite material for electrical and electronic components of cutting tools. It can be used as aerospace high temperature resistant materials, wear-resistant and smooth solid materials, cutting tools, thermocouple protection tubes and electrode materials for electrolytic molten compounds. It is especially suitable for use as the surface of rolling bearing balls. |
| application | zirconium boride powder has low density, high melting point, high hardness, high specific strength, high specific stiffness, good thermal conductivity, excellent electrical conductivity, excellent ablation resistance and oxidation resistance, and is considered to be one of the most promising structural/functional integrated materials, zirconium boride powder has been widely used in aerospace, military manufacturing, metallurgical minerals and mechanical processing. At present, the main method for preparing zirconium boride ceramics is to sinter zirconium boride powder under high temperature and high pressure conditions. Therefore, the preparation of zirconium boride powder with high purity and good sintering performance is the key to its great application value. |
| preparation | zirconium boride powder is mainly prepared by carbothermal reduction method of ZrO2 powder and carbon black or graphite powder. the reaction equation is: 3ZrO2 B4C 8C B2O3 = 3ZrB2 9CO ↑ the above reaction process belongs to the solid-solid reaction type, and the reaction process is controlled by substance diffusion. The disadvantage of this method is that the zirconia powder and carbon black or graphite powder are mixed unevenly and the carbon black or graphite powder has low activity, so that the zirconia is not completely reduced and becomes an impurity of the product. In addition, the carbon black or graphite powder remaining in the zirconium boride powder has low activity, and a higher temperature (greater than 600 ℃) is required for decarburization to make C generate carbon monoxide or carbon dioxide in the oxidizing atmosphere. The higher the temperature, the higher the oxygen content in the powder, resulting in a decrease in the quality of the zirconium boride powder. |
| production method | there are four main preparation methods:(1) direct reaction of metal zirconium and boron;(2) boron carbide method;(3) carbon reduction method;(4) vapor deposition method. Industrial synthesis of zirconium boride mainly uses (2) and (3), its 3ZrO2 B4C 8C B2O3 = 3ZrB2 9CO |
Last Update：2024-04-10 22:29:15
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CAS: 12045-64-6
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CAS: 12045-64-6
Tel: 18301782025
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Mobile: 18021002903
QQ: 3008007409
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