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全球钽市场报告(2015-2019年)
Tantalum is a grey metallic element that is heavy and hard. The metal is shown to resist chemical attacks at temperatures below 150°C. Tantalum is a rare earth metal and is not found in large amounts. Tantalum exhibits resistance to corrosion due to the presence of an oxide film on its surface. The melting point of tantalum is quite high and is lower only than that of tungsten and rhenium. The metal exhibits maximum capacitance when compared to other elements in the periodic table and has an atomic number of 73. It is denoted by the symbol "Ta".
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全球稀土金属市场报告(2015-2019年)
Rare earth metals comprise seventeen chemical elements in the periodic table, i.e., fifteen elements of the lanthanide series, and scandium, and yttrium. Scandium and yttrium are also considered rare earth metals as they are found in the same mineral ore deposits as the other elements of the lanthanide series. Rare earth metals have unique physical and chemical properties, which make them suitable to alloy with other metals for use in applications that require enhanced magnetic strength, hightemperature resistance, and other properties.
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澳大利亚矿业投资环境分析
澳大利亚是中国企业矿业投资的重要目标国。本文在澳大利亚矿产资源与矿产经济概述基础上,系统介绍了矿业投资者经常面临的澳大利亚矿业法律与税务等事宜,供投资者参考。
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全球氖气市场报告(2015-2019年)
Neon, a noble and inert gas and aerogen, is a chemical element that exhibits chemical inertness on account of its unique atomic structure. It is highly unreactive; therefore, it is widely used for non-reactive applications. Apart from neon, there are five other naturally occurring noble gases: helium, argon, krypton, xenon, and radon.
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全球镍市场报告(2015-2019年)
Nickel is an element represented in the periodic table as Ni and bears the atomic number 28. The metal is silvery white and lustrous with a golden tinge. The metal is classified as a transition metal and is hard and ductile. Pure nickel has the tendency to show a reactive property in the powdered form, which is exposed over a large surface area. Larger chunks of metal are less reactive, as contact with air forms a layer of oxide on the surface. Nickel is not found on the earth's surface due to its reaction with oxygen when exposed to air. Most of the nickel is confined to the interior of the earth and the ores of nickel are extracted through mining. Such ores are called primary nickel and recycled nickel is called secondary nickel.
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全球钴市场报告(2015-2019年)
Cobalt occurs in combination with other elements in minerals such as skutterudite (a cobalt-nickel arsenide), carrollite (a copper-cobalt-(nickel) sulfide), and asbolane (a nickel-cobalt-manganese oxide). It is obtained from three main ore deposits: Sedimenthosted stratiform copper deposits, magmatic nickel sulfide deposits, and nickel laterite deposits. Cobalt is generally processed as a by-product of processed nickel and copper ores. It can also be produced through recycling. Cobalt and its alloys find application in many sectors and industries, such as battery chemicals, superalloys, defense, and catalysts.