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  • Tantalum and Niobium Industry Annual Report 2023

    2024-02-20 08:30:15   【Print】
    The following is a brief synopsis of the report. Your access is restricted as it is a subscription based service.
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    1. Definition, Type, Distribution, Application

    1.1 Definition of Tantalum and Niobium

    Tantalum is a tough, ductile metal with the symbol of Ta and Mohs hardness of 6.5.Asian Metal Copyright6 ? 10-6 per degree.Asian Metal Copyright When exposed to air, tantalum forms a very dense oxide layer.Asian Metal Copyright Tantalum dissolves quickly in caustic soda solution with the concentrate of 40% at the temperature of 110°C.Asian Metal Copyright Its melting point is 2,996°C, which is only lower than that of tungsten, rhenium and osmium.Asian Metal Copyright Except for the above cases, it is resistant to practically all inorganic salts under 150°C.Asian Metal Copyright Tantalum with good ductility property can be drawn into thin foils.Asian Metal Copyright However, it is susceptible to corrosion in hot concentrated sulfuric acid.Asian Metal Copyright Tantalum has a low coefficient of thermal expansion and sees an expansion of only 6.Asian Metal Copyright1 Definition of Tantalum and Niobium Tantalum is a tough, ductile metal with the symbol of Ta and Mohs hardness of 6.Asian Metal Copyright6 ? 10-6 per degree.Asian Metal Copyright Except for the above cases, it is resistant to practically all inorganic salts under 150°C.Asian Metal Copyright In addition, the tenacity of the metal is even superior to that of copper.
    Tantalum has very excellent chemical properties. It is highly corrosion-resistant and inert to hydrochloric acid, concentrated nitric acid and aqua regia whether in cold or hot conditions.Asian Metal Copyright5.Asian Metal Copyright However, it is susceptible to corrosion in hot concentrated sulfuric acid.Asian Metal Copyright .Asian Metal Copyright The corrosion rate of tantalum in concentrated sulfuric acid is negligible under the temperature of 150°C.

    Tantalum can react with alkali quickly. Tantalum dissolves quickly in caustic soda solution with the concentrate of 40% at the temperature of 110°C.Asian Metal Copyright Tantalum has a low coefficient of thermal expansion and sees an expansion of only 6.Asian Metal Copyright And it also quickly dissolves in potassium hydroxide solution with the same concentrate at 100°C.Asian Metal Copyright Tantalum can react with alkali quickly.Asian Metal Copyright Except for the above cases, it is resistant to practically all inorganic salts under 150°C.Asian Metal Copyright The corrosion rate of tantalum in concentrated sulfuric acid is negligible under the temperature of 150°C.Asian Metal Copyright Studies show that tantalum is inert to alkali solution, chlorine, bromine, dilute sulfuric acid and many other agents, and only reacts with hydrofluoric acid and hot concentrated sulfuric acid at room temperature, which is relatively unusual among metals.

    .Asian Metal Copyright The corrosion rate of tantalum in concentrated sulfuric acid is negligible under the temperature of 150°CAsian Metal Copyright
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