Zirconium hydride

Chinese name: zirconium hydride

Foreign name: zirconium hydride

Chemical formula: ZrH2

Molecular weight: 93.24 CAS

Login number: 7704-99-6

EINECS login number: 231-727-3

Melting point: 1857 ℃

Density: 5.61 g/cm ³

Appearance: Grey black powder

Solubility: Zirconium hydride is soluble in hydrofluoric acid or alcohol. They react violently with water, acids, oxidants, or halogenated compounds.

Preparation method: Heat 99.8% pure sponge like metal zirconium with high-purity hydrogen (99.9999%) to 400-600 ℃, and directly react to obtain

Physicochemical properties: Based on the purity of the hydrogen gas used, the product is composed of ZrH2 xo. Between ZrH1.6 and ZrH2, zirconium hydride has two forms: a rhombic fluorite type cubic crystal at room temperature and a fluorite type cubic crystal at high temperature. Because hydrogen occupies a certain position in the lattice, it not only forms interstitial compounds, but also zirconium hydride δ Type (face centered cubic crystal, composition range ZrH1.44 to ZrH1.65) and γ Type (composition range ZrH0.05 to ZrH1.36). The appearance of zirconium hydride is metallic, and the powder is black. The relative molecular weight is 93.24. Relative density 5.74. Generate heat of 124kJ/mol. Conductivity lies between metals and semiconductors. When the pressure drops to 1.33 × 10-3Pa. Hydrogen gas is released at 400 ℃ and becomes a metal. No hygroscopicity. Stable in the air. Under normal circumstances, it does not react with water or weak acids and is easily soluble in 1% to 5% hydrofluoric acid. It can react violently with oxidants and strong acids. When ignited, it can burn smoothly. Heat to 500-700 ℃ and almost completely decompose.

Product Usage: Zirconium hydride is a strong reducing agent. Used as an additive. Oxygen scavenger and desulfurizer for preparing ferroalloy. Mixed with Calcium carbide and nitride, it can be used as metal coating. Because it can infiltrate ceramics, it is used as a metal ceramic adhesive for vacuum tubes and ceramic devices. In addition, it is used as Neutron moderator and other materials for atomic power plants, getter for vacuum tubes, fire trap, flux, etc.

Storage conditions: Dispose of under dry protective gas, keep the container sealed, place in a tight container, and store in a cool, dry place