HAFNIUM BORIDE
- CAS NO.：12007-23-7
- Empirical Formula: B2Hf-
- Molecular Weight: 200.11
- MDL number: MFCD23713084
- EINECS: 234-500-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-04-09 11:47:26
What is HAFNIUM BORIDE?
Chemical properties
gray, hexagonal, crystal(s) solid, a=0.3141 nm, c=0.3470nm; can be prepared by heating HfO2+C+B2O3; hardness 2900 kgf/mm2; resistivity 8.8μohm· cm; used as a refractory material and as a sputtering target with 99.5% purity to produce films, which may be wear-resistant and semiconducting [HAW93] [KIR80] [CER91]
The Uses of HAFNIUM BORIDE
Hafnium boride is used in wear resistant coatings. It is also employed as a nuclear reactor control rod. Furthermore, it is used in hypervelocity re-entry vehicles like ICBM heat shields or aerodynamic leading-edges. It is useful in the preparation of high temperature composites in conjunction with silicon carbide (SiC).
Properties of HAFNIUM BORIDE
| Melting point: | 3250°C |
| Density | 10.5 |
| form | Powder |
| Specific Gravity | 10.5 |
| color | gray hexagonal, hexane crystals, crystalline |
| Water Solubility | Insoluble in water. |
| Crystal Structure | Hexagonal |
| Exposure limits | ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3 |
| EPA Substance Registry System | Hafnium boride (HfB2) (12007-23-7) |
Safety information for HAFNIUM BORIDE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for HAFNIUM BORIDE
| InChIKey | VFOMGQXFCYKNAF-UHFFFAOYSA-N |
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