ZIRCONIUM HYDRIDE

ZIRCONIUM HYDRIDE Basic information
Product Name:ZIRCONIUM HYDRIDE
Synonyms:zirconium dihydride;Zirconium(Ⅱ)bydride;ZIRCONIUM(II) HYDRIDE;ZIRCONIUM HYDRIDE, -325 MESH, 99%;Zirconiumhydride,99.7%(metalsbasis);ZIRCONIUM HYDRIDE;Dihydridezirconium(II);Dihydrogen zirconium(II) salt
CAS:7704-99-6
MF:Zr
MW:91.22
EINECS:231-727-3
Product Categories:Catalysis and Inorganic Chemistry;Materials for Hydrogen Storage;Metal HydridesAlternative Energy;Metal HydridesChemical Synthesis;Reduction;Synthetic Reagents;Zirconium
Mol File:7704-99-6.mol
ZIRCONIUM HYDRIDE Structure
ZIRCONIUM HYDRIDE Chemical Properties
density 5.47
form Powder
Water Solubility no reaction with H2O [MER06]
Sensitive Moisture Sensitive
Merck 14,10176
CAS DataBase Reference7704-99-6(CAS DataBase Reference)
EPA Substance Registry SystemZirconium hydride (ZrH2) (7704-99-6)
Safety Information
Hazard Codes F
Risk Statements 11-36/37/38
Safety Statements 24/25-43-7/8
RIDADR UN 1437 4.1/PG 2
WGK Germany 3
RTECS ZH8015000
TSCA Yes
HazardClass 4.1
PackingGroup II
HS Code 28500090
MSDS Information
ProviderLanguage
SigmaAldrich English
ALFA English
ZIRCONIUM HYDRIDE Usage And Synthesis
Chemical PropertiesGray-black metallic powder. Stable toward air and water.
Physical propertiesGrayish-black powder; density 5.60 g/cm3; stable in water; soluble in dilute hydrofluoric acid; soluble in concentrated acids.
UsesZirconium Hydride, ZrH2, is a brittle, metallicgray solid that is stable in air and water, and has a density of 5.6 g/cm3. The chemical properties of ZrH2 closely resemble those of titanium hydride. Commercial uses are as a getter in the manufacture of vacuum tubes and other systems; as a hydrogen source for foaming metals; as a hydrogen reservoir; for the introduction of zirconium into powdered alloys; for metal–ceramic and metal–metal bonding; as a moderator in nuclear reactors; and as a source of Zr metal powder and alloys.
UsesZirconium hydride is a powerful reducing agent in acid solution or at high temperatures; hydrogenation catalyst; in the vacuum tube industry.Also, it is used as a source of pure hydrogen and a catalyst in hydrogenation reactions. Some other applications are in powder metallurgy; as a moderator in nuclear reactors; and as a metal-foaming agent
UsesZirconium(II) hydride (ZrH2) can be used as a precursor for:
  • ?Reactive hot-pressing synthesis of Zr2SC ceramics by displacement reaction with the mixture of ZrC and ZrS2.,·?
  • ?The synthesis of Mg-Zr hydrides by treating with MgH2 for hydrogen storage.???????
  • The preparation of layer structured β-zirconium nitride chloride (ZrNCl) by reacting with NH4Cl.

DefinitionContains 1.7–2.1% combined hydrogen which can be driven off in a vacuum above 600C.
PreparationZirconium hydride may be prepared by heating zirconium oxide with magnesium in the presence of hydrogen: ZrO2 + 2Mg + H2 → ZrH2 + 2MgO
Alternatively, hydride may be made by heating zirconium oxide with calcium hydride in the presence of hydrogen
Hydride also may be obtained by combining zirconium metal with hydrogen at elevated temperature.

Production MethodsZirconium hydride in powder form was produced by the reduction of zirconium oxide with calcium hydride in a bomb reactor. However, the workup was hazardous and many fires and explosions occurred when the calcium oxide was dissolved with hydrochloric acid to recover the hydride powder. With the ready availability of zirconium metal via the Kroll process, zirconium hydride can be obtained by exothermic absorption of hydrogen by pure zirconium, usually highly porous sponge. The heat of formation is 167.4 J/mol (40 kcal/mol) hydrogen absorbed.
General DescriptionThis product has been enhanced for energy efficiency.
HazardFlammable, dangerous fire risk, especially in the presence of oxidizers.
Flammability and ExplosibilityFlammable
Safety ProfileA powerful reducing agent. Flammable when dry or wet. Very dangerous to handle; can explode. Incandesces when heated in air. See also HYDRIDES and ZIRCONIUM COMPOUNDS.
ZIRCONIUM HYDRIDE Preparation Products And Raw materials
ZIRCONIUM DINITRATE OXIDE COBALT ZIRCONATE ZIRCONIUM N-PROPOXIDE Barium zirconate SODIUM ZIRCONATE CADMIUM ZIRCONATE Bis(cyclopentadienyl)zirconium dichloride TETRAKIS(DIETHYLAMINO)ZIRCONIUM Calcium zirconate Zirconium oxychloride LITHIUM ZIRCONATE Zirconium fluoride Zirconium tetrachloride ZIRCONIUM(IV) ACETYLACETONATE ZIRCONIUM OXIDE ZIRCONIUM(IV) ETHOXIDE ZIRCONIUM TRIFLUOROACETYLACETONATE Cyclopentadienylzirconium trichloride

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