ニオブ・タンタル鉱の塩化について

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書誌事項

タイトル別名
  • Study on the Chlorination of the Materials Containing Niobium and Tantalum Elements
  • ニオブ タンタルコウ ノ エンカ ニ ツイテ

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抄録

Reactivity of Nb-Ta-containing materials when they were heated with charcoal in Cl2-atmosphere was studied using the thermobalance.<BR>The data of the ignition temperature, (at which the spontaneous reaction began) and the reaction velocity (slope of weight-temp. curve) slowed following results.(1) Highly reactive (Ignition temp. 150-250°C) Ferroniobium, Nb2O5+Ta2O5 mixture sintered with charcoal at 900-1, 200°C in vacuum. Niobium lower oxide+charcoal.(2) Reactive (Ignition temp. 250-350°C) Nb2O5+charcoal, tantalum carbide, Crude Nb2O5-Ta2O5 mix, ignited at 500-1, 000°C+charcoal.(3) Weakly reactive (Ignitive temp. 350-450°C) Ta2O5+charcoal, Tantalum lower oxide+charcoal.<BR>Niobium is usualy more easily chlorinated than tantalum, and is reduced to its lower oxide by hydrogen treduction easier than tantalum. High reactivity of vacuum sintered Nb2O5-Ta2O5 mix, suggests that Nb2O5 iin it is partly reduced to lower oxide at the sintering temp. above 800°C.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 76 (863), 319-324, 1960

    一般社団法人 資源・素材学会

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