Tantalum

Tantalum By: Danijel M. Tantalum is a silver reflective rare earth element that is used in both the electronics and engineering industries. It is an extremely useful element and is a vital part in modern life. Tantalum is found in columbite-tantalite ores. Many countries don’t have high grade Tantalum and have to recycle and import it from other countries such as Australia, Kazakhstan, Canada, China and Thailand. It is a very used element that has been a giant boost in technological advancement

Tantalum Electrolytic Capacitor Construction The tantalum power undergoes a process called pressing. This mean that the powder is mixed with binder to make sure the particles will stick together when pressed to form the anode which will flow into press tool smoothly. A high pressure condition is applied to the tantalum powder around a tantalum wire to form tantalum slug. The binder is removed by heating the slug under vacuum and high temperature for a few minutes. Next process is sintering, the tantalum

the coltan to settle to the bottom due to its heavy weight.Then the next step in the supply chain after its extraction is the trading and processing of Coltan. Coltan is usually traded in three forms: as ore concentrates, as tantalum oxides and salt, or as capacitor-grade tantalum. Columbite–tantalite is not traded on an open exchange, but in negotiations taking place on a bilateral basis between buyers and sellers around the world. Prices are privately discussed and purchase contracts

Tantalum is a toxic heavy metal, this is due to the oxide skin on the surface of the metal. This skin also makes this highly conductive metal resistant to corrosion. However it’s highly valuable and a great substitute for platinum in lab equipment. With melting temperatures three times higher than copper it’s able to have larger amounts of electricity passed through it making regular copper wire technology obsolete in comparison to tantalum wire. A capacitor is an electrical device that is able

the noble gas notation is [Ar] 4S2 3D3. Vanadium is located in group 5B, in the transition metals, on the periodic table of the elements. Also, included in this group are niobium [atomic number 41 with an atomic weight of 92.9064 grams per mole], tantalum [atomic number 73 with an atomic weight of 180.948 grams per mole], and dubnium [atomic number 105 with an atomic weight of 262.114 grams per mole]. With a smaller density than its two counter parts, that we have data referencing, vanadium also

Coltan is a tantalum-bearing ore that is very rare, valuable and highly sought all over the world (Hayes & Burge 2003: 11). Tantalum has double the density of steel and is extremely resistant to heat and corrosion (Hayes & Burge 2003: 11). In the majority of high-tech electronics such as computers, mobile phones, and game consoles, it is used as capacitors or super-alloys to conduct electric charges in these electronic equipments (Bleischwitz et al. 2012: 20). Almost a decade ago, Australia was

1. Introduction The complex and interesting optical properties can be shown clearly on Nanostructured metals the collective oscillations of the conduction electrons termed plasmons lead to most striking phenomenon encountered in these structures are resonances . Plasmon modes exist in a number of geometries and in various metals — most importantly in noble metals such as gold, copper and silver. Under certain circumstances plasmons are excited by light, which leads to strong light scattering and

Chapter Four: Where Atoms Come From: “We Are All Star Stuff” 1. How are elements with atomic numbers greater than iron’s atomic number formed? (1 mark) Elements with atomic numbers greater than iron’s atomic number form during the formation of a supernovae, also known as a mini-bang. The process begins when a massive star has depleted its supply of magnesium and silicon, and only has a bare iron ore remaining. Now, the star no longer has the energy to maintain its immense mass against the force

IntroductionThe complex and interesting optical properties can be shown clearly on Nanostructured metals the collective oscillations of the conduction electrons termed plasmons lead to most striking phenomenon encountered in these structures are resonances . Plasmon modes number of geometries and in various metals ? most importantly in noble metals such as gold, copper and silver. Under certain circumstances are excited by light, which leads to strong light scattering and absorption and an enhancement

Many Americans have the luxury of purchasing new electronics almost every year. Something that is ignored, since it has become so natural, is exactly how their little devices had come to their lives and what happens when it is thrown away. In a more perfect world, the production of electronics would that of an ethical process, but it is unfortunately not that case. It all starts with the harvesting of raw materials. When bringing up the idea of a “100 percent ethically sourced” smartphone, Caroline