수소화 지르코늄

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Danger

• 유해·위험 문구

  H228：인화성 고체

  H315：피부에 자극을 일으킴

  H319：눈에 심한 자극을 일으킴

  H335：호흡 자극성을 일으킬 수 있음

• 예방조치문구

  P210：열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.

  P302+P352：피부에 묻으면 다량의 물로 씻으시오.

  P305+P351+P338：눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

수소화 지르코늄 화학적 특성, 용도, 생산

• 개요

  Zirconium(II) hydride, ZrH2, is a molecular chemical compound, which has been produced by laser ablation and isolated at low temperature. Zirconium(II) hydride has a dihedral (C2v) structure. In zirconium(II) hydride, the formal oxidation states of hydrogen and zirconium are 21 and 12, respectively, since the electronegativity of zirconium is lower than that of hydrogen. The stability of metal hydrides with the formula MH2 (M 5 Ti-Hf) decreases as the atomic number increases.
  

• 화학적 성질

  Gray-black metallic powder. Stable toward air and water.

• 물리적 성질

  Grayish-black powder; density 5.60 g/cm³; stable in water; soluble in dilute hydrofluoric acid; soluble in concentrated acids.

• 용도

  Zirconium 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

• 제조 방법

  Zirconium 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.

• 생산 방법

  Zirconium 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.

• 정의

  Contains 1.7–2.1% combined hydrogen which can be driven off in a vacuum above 600C.

• 일반 설명

  This product has been enhanced for energy efficiency.

• 위험도

  Flammable, dangerous fire risk, especially in the presence of oxidizers.

• Safety Profile

  A 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.

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