The Nature and Reactivity of Gallium Hydride Reactions

Unlike its analogous aluminium system, gallium hydride does not show a readily accessible and convenient redox cycle. However, it does provide a low cost way of achieving high purity GaN crystals. It is used in a number of applications such as optics and semiconductor devices.

Gallium hydride is a transition metal borohydride compound. Its oxidation number is -1. The hydride atoms exhibit nucleophilic and reducing properties. They can be reacted with other hydride atoms to form a hydride-hydride bond.

Gallium hydride has a high nuclear charge of 52+. When it reacts with NH3 gas, it forms GaN crystals. Various preparative routes have been investigated. Some have included the use of organo mercury and lithium ion reagents. Others include the synthesis of trimethylamine-gallane with dimethylmercury and halogeno-galanes.

Although some previous studies have reported gallium hydride reactions, little work has been done on the nature and reactivity of these compounds. In this study, the reactivity of the hydride ligand in GaN crystals was studied using acetonitrile-d3. This study revealed that the hydride ligand in GaN has a very broad resonance at 4.35 ppm. At higher concentrations, it exhibits a characteristic AA’BB’ multiplet. Moreover, it displays a borate/ligand ratio of about 1:2.

Reactions of 1-H with Bronsted acids were also characterized. The results showed that the ligand in the gallium hydride has a polar-covalent s-bond with a Wiberg Bond Index (WBI) of 0.77. This suggests the involvement of NHC p-orbitals in the reaction.


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    Hafnium Hydride

    hafnium hydride is a refractory tetrahedral crystal that forms as an intermediate in the process of making hafnium powder. It is a valuable material for applications that require high resistance to oxidation and abrasion.

    The hydride can be prepared by a reversible reaction of hafnium with hydrogen gas in a pressure and temperature environment. The proportion of hydrogen absorbed depends on the temperature and pressure. The hydride can be made from mass hafnium metal or from the amorphous precursor, hafnocene difluoride.

    Hydrogen-rich hafnium hydrides are important materials in search of exotic properties such as high-Tc superconductivity. A metastable stochiometric HfH9 with Tc of 110 K at 200 GPa has been predicted using structural searches and first-principle calculations. The hydride is stabilized by unique hydrogen tubes intercalated within the HfH3 framework, each tube giving 0.876 electrons from the framework.

    Reversible hydrogenation of olefins in the presence of catalytic amounts of the hydride complex (Hf(CH2CH2R)-n(Xy-N3N)) is observed at 25 degC. The complex reacted with olefins to produce the anti-Markovnikov insertion product [Hf(CH2CH2R)(thf)(Xy-N3N)]+, indicating that the hydride possesses a strong hydrogen affinity and a catalytic hydrogenation activity.

    Resistive switching memories based on amorphous-nanocrystalline hafnium oxide films have been investigated and shown to possess excellent flexibility in their resistivity spectra. The annealing of the oxide films was found to influence the resistivity switching properties.

    An etching technique for cleaning a hafnium oxide film has been developed. A hafnium oxide layer was deposited on an atomic layer deposition reactor and then etched off by a flow of hydrogen chloride gas at 1173 K. This resulted in a reduction of the oxide film weight that was comparable to that of hafnium tetrachloride.

    Hafnium Hydride HfH2 Powder CAS 13966-92-2

    About Hafnium Hydride HfH2 Powder:
    Hydride hafnium (HfH2) is a grey-black powder. The hydride is hydrogen at a temperature above 300 ° C. HFH1.86 is formed when hafnium is heated to more than 700 ° C. Feel free to send an inquiry to get the latest price if you would like to buy Vanadium Hydride VH2 Powder in bulk.
     
    Hafnium Hydride HfH2 Powder CAS 13966-92-2:
    HfH2 Powder is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. Hydride compounds are used often used as portable sources of hydrogen gas. Ours produces too many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP and follows applicable ASTM testing standards. Typical and custom packaging is available.
     
    Applications of Hafnium Hydride HfH2 Powder:
    Hafnium Hydride HfH2, For atomic energy industrial and aerospace industries, the atomic reactors can also do a small volume and large rocket propeller.
    HfH2 is mixed with an oxidant to use as a component of the torch, trust and combustion loading in fireworks. HfH2 will also be used as alloy components in powder metallurgy.
     
    Storage Condition of Hafnium Hydride HfH2 Powder:
    The damp reunion will affect HfH2 powder dispersion performance and using effects, therefore, Hafnium Hydride HfH2 Powder should be sealed in vacuum packing and stored in cool and dry room, the Hafnium Hydride HfH2 Powder can not be exposure to air. In addition, the HfH2 powder should be avoided under stress.
     
    Packing & Shipping of Hafnium Hydride HfH2 Powder:
    We have many different kinds of packing which depend on the Hafnium Hydride HfH2 Powder quantity.
    Hafnium Hydride HfH2 Powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
    Hafnium Hydride HfH2 Powder shipping: could be shipped out by sea, by air, by express, as soon as possible once payment receipt.

    Hafnium Hydride HfH2 Powder CAS 13966-92-2插图

     

    Hafnium Hydride Properties

    Other Nameshafnium(2+) dihydride, HfH2 powder
    CAS No.12007-26-2
    Compound FormulaHfH2
    Molecular Weight180.51
    AppearanceGray to Black Powder
    Melting PointN/A
    Boiling PointN/A
    Density11.4 g/cm3
    Solubility in H2OInsoluble
    Exact Mass181.962199
      
      

    Hafnium Hydride Health & Safety Information

    Signal WordDanger
    Hazard StatementsH228-H261-H302+H312+H332-H315-H319-H335
    Hazard CodesF
    Risk CodesN/A
    Safety StatementsN/A
    Transport InformationUN3132 4.3/ PG II
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    Zirconium Hydride ZrH2 Powder CAS 7704-99-6

    About Zirconium Hydride ZrH2 Powder:
    The hydride zirconium chemical ZrH2, density is 5.6 g / cm3, and the melting is decomposed, and heat-39.7 kcal/mol is formed. Its preparation method is carried out with titanium hydrogenated, and the temperature of the hydrogenation is often carried out at 900 ° C. The molecular weight of zirconium hydride is 93.24. Zirconium hydrogen fluid can be dissolved in hydrofluoric acid or ethanol; they have severely reacted with water, acid, oxidant or halogenated compound.
    Zirconium hydrogen fluid is a stable powder, and the air and water are stable under normal conditions. It can react violently with oxidizing agents and strong acids, zirconium can smoothly burn smoothly when ignition, and decompose in vacuum 300 ° C, completely decompose at 500-700 ° C.
    L. zirconium hydride depicts an alloy bonded from zirconium and hydrogen. Hydrogen is used as a hardening agent to prevent dislocation in zirconia atomic lattices. By changing the content of hydrogen and hydrogen in the presence of hydride (precipitation phase), the hardness, ductility, and tensile strength of the resulting hydride can be controlled. The zirconium hydride having a hydrogen content can make it harder, stronger than zirconium, but the toughness of such zirconia is not as zirconium. Feel free to send an inquiry to get the latest price if you would like to buy Zirconium Hydride ZrH2 Powder in bulk.

    Zirconium Hydride Powder CAS 7704-99-6:

    It is a stable powder that is stable to air and water under normal conditions. It reacts violently with oxidants and strong acids. It burns smoothly during ignition, begins to decompose at 300 ° C in a vacuum, and completely decomposes at 500-700 ° C.

    How is Zirconium Hydride ZrH2 Powder produced?
    The metal is interacting with hydrogen to form zirconium hydrogenide. Sponge metallic zirconium with a purity of 99.8% was heated to high purity hydrogen (99.999%) to 400 to 600 ° C, directly reacted, ie, zirconium hydrogen fluid. The reaction is an exothermic reaction. This reaction also occurs even at room temperature, and uniform integral hydrogenation is usually achieved by annealing at a temperature of 400-600 ° C for several hours to several weeks. At room temperature, zirconium hydrogenide in the air, even in a high vacuum, will be rapidly oxidized. The formed nano-thin oxide layer prevents oxygen from further diffused into the material, so changes caused by oxidation can generally be ignored. Or reduce zirconium dioxide at 600 ° C in a hydrogen stream, and zirconium hydride can be obtained.
     
    Applications of Zirconium Hydride ZrH2 Powder:
    Zirconium hydride is a pure powder, used as a hydrogenation catalyst in powder metallurgy, used as an absorbent in the vacuum tube industry. In a vacuum system, zirconium hydride helps establish a seal between metals and ceramics.
    Zirconium hydrogenide is used in industrial use for fireworks, flux and ingredients, used in a nuclear reactor as a chuck, in a vacuum tube, and is also used in metal-ceramic sealing.
    ZrH2 is used in powder metallurgy, used as a hydrogenation catalyst, used in metal foam production as a reducing agent, vacuum tube, and foaming agent. Other uses include fuel as a firework, i.e., fireworks exploding.
    Zirconium hydride is a strong reducing agent. Use it as an additive. Desoxicide and desulfurization agents at the time of iron alloy are prepared.
    Mixed with carbonized calcium carbon carbide and nitride can be used as a metal coating.
    Since the ceramics can be infiltrated, zirconium is used as a metal-ceramic adhesive for vacuum tubes and ceramic devices.
    In addition, zirconium hydride can also be used as a neutron reduction agent and an atomic power station other material, a suction agent, a firework, ambient solvent or the like.

    Storage Condition of Zirconium Hydride ZrH2 Powder:
    The damp reunion will affect ZrH2 powder dispersion performance and using effects, therefore, Zirconium Hydride ZrH2 Powder should be sealed in vacuum packing and stored in cool and dry room, the Zirconium Hydride ZrH2 Powder can not be exposure to air. In addition, the ZrH2 powder should be avoided under stress.

    Packing & Shipping of Zirconium Hydride ZrH2 Powder:
    We have many different kinds of packing which depend on the Zirconium Hydride ZrH2 Powder quantity.
    Zirconium Hydride ZrH2 Powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
    Zirconium Hydride ZrH2 Powder shipping: could be shipped out by sea, by air, by express, as soon as possible once payment receipt.
    Zirconium Hydride ZrH2 Powder CAS 7704-99-6插图

    Zirconium Hydride ZrH2 Powder Properties

    Other NamesZirconium(II) hydride, Dihydridozirconium, zirconium(2+) dihydride, ZrHx, ZrH, CAS 15457-96-2 (ZrH4), CAS 13940-37-9 (ZrH), zirconium-hydrogen alloy
    CAS No.7704-99-6
    Compound FormulaZrH2 
    Molecular Weight93.24
    AppearanceDark gray to black powder
    Melting PointN/A
    Solubility in waterN/A
    Density5.56 g/cm3
    Purity99.00%
    Particle Size325mesh
    Boling pointN/A
    Specific HeatN/A
    Thermal ConductivityN/A
    Thermal ExpansionN/A
    Young’s ModulusN/A
    Exact Mass91.920354
    Monoisotopic Mass91.920354 Da
      
      

    Zirconium Hydride ZrH2 Powder Health & Safety Information

    Safety WarningDanger
    Hazard StatementsH228-H315-H319-H335
    Flashing pointN/A
    Hazard CodesF
    Risk Codes11-36/37/38
    Safety Statements24/25-43-7/8
    RTECS NumberZH8015000
    Transport InformationUN 1437 4.1/PG 2
    WGK Germany3
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