Tantalum Bar 1kg (2x500g) 99.95% , Tantalum Bar 2 x 500g Technology Metal and Valuable Investment
Buy 1kg (2x500g) Tantalum bars with purity 99.95%.
Buy now high purity Tantalum metal ingots with at least 99.95% purity. Tantalum (Tantalum) metal is a technology metal, collectible and valuable investment. With us you get the best price for 1kg Tantalum metal ingot. The current tantalum ingot price is stable at the moment. It is 869€/kg right now, so you should buy tantalum metal ingot now.
- Available for immediate delivery within 1-2 working days via GLS or DHL
- Purity: min.: 99,95%
- Quantity: 2x 500g
- Quantity discounts see below
Although tantalum is not a precious metal, it is valuable due to its rarity and its particularly advantageous properties. Due to its properties, tantalum is becoming increasingly popular and important in many different industries, including the jewellery industry, where tantalum is still relatively new.
Since tantalum is not a precious metal, it reacts with non-metals under high temperatures. At room temperature, however, it is protected by tantalum V-oxide and is thus passivated, which gives it high corrosion resistance.
Tantalum also cannot be dissolved in most acids, with the exception of hydrofluoric acid, oleum and molten salts. As a powder, tantalum is very flammable. Moreover, pure tantalum is allergy-free and harmless to health, which is why it is also used in medical technology and jewellery.
However, there are some tantalum compounds that show indications of carcinogenic behaviour. So far, 30 isotopes and 26 core isomers of tantalum are known.
Tantalum is extremely hard, heavy and robust, with a Vickers hardness of 60-120 HV and a Moh's hardness of 6.5. It is clearly harder than silver and gold, and is thus not easily deformable in the solid state.
Tantalum is a chemical element of the fifth subgroup in the periodic table, with the symbol Ta and atomic number 73. It is a rare transition metal that is used in many different areas today.
Discovery & Naming
Tantalum was discovered in 1802 by Anders Gustav Ekeberg in a tantalite ore in Finland. Tantalum was named after the Greek mythology of Tantalus, because the tantalum V-oxide separated by Ekeberg did not dissolve in any acid by which it was surrounded. Just as Tantalus was surrounded by water, but could not drink it. What is a punishment in mythology is described as an ideal property in tantalum, because it creates a protective shield that makes tantalum robust and allergy-free.
The very pure tantalum alloys are often used for chemical plant equipment such as pipes and heat exchangers, medical implants, surgical instruments and in high temperature furnaces as heat conductors. Much of the tantalum production is also used for electronic capacitors, crucibles and as an alloying element in the steel industry.
Most of the tantalum (worldwide annual production volume 1,400 t) is used for very small capacitors with high capacity. In 2007, 60 % of the tantalum was used for the production of capacitors. These tantalum electrolytic capacitors (electrolytic capacitors) are used everywhere in modern microelectronics, especially for mobile phones and in car manufacturing. The effect is based on the tantalum oxide layer on the surface of the wound tantalum foil, which is still stable and safely insulating even in a very thin version. The thinner the layer between the electrodes, the higher the capacitance with the same foil area; in addition, tantalum oxide has an extremely high permittivity, which also increases the capacitance.
Because tantalum is non-toxic and does not react with body tissues or fluids, elemental tantalum is used for medical implants and instruments. Bone nails, prostheses, staples and jaw screws, among other things, are made of tantalum. New hip implants consist of 98 % tantalum, a biocompatible metal, and with their special structure they achieve a hitherto unknown osseointegration (growth of the bone onto the implant). By integrating the implant into the bone structure, its survival time in the patient's body can be considerably extended. In addition, tantalum is an X-ray contrast medium that is rarely used due to its high cost.
Tantalum is used in the chemical industry because of its durability. It serves as a lining material for reaction boilers and is used for heat exchangers and pumps. For these purposes, pure tantalum is not usually used, but alloys containing 2.5-10 % tungsten. These are more stable and resistant than pure tantalum. At the same time, the desired ductility is maintained. Other uses include laboratory equipment, spinnerets and the cathodes of electron tubes. Here, tantalum benefits from being able to absorb up to 740 parts by volume of gases at 800 °C (getter effect), which ensures a high vacuum in the tubes.
Superalloys used in the construction of turbines and aircraft engines contain up to 9 % tantalum. Thus, the addition of 3-4 % tantalum to a nickel superalloy increases the strength of the material at high temperatures
Tantalum pentoxide (tantalum(V) oxide, Ta2O5) is used in optical coating technology by means of physical vapour deposition (PVD), as a vacuum-based coating process (thin-film technologies) for the production of highly refractive index glass for camera lenses. The refractive index of tantalum pentoxide as an optical thin film at 500 nm wavelength is between 2.1 and 2.15 (electron beam evaporation) and about 2.2 (ion beam sputtering), depending on the coating process used. The material is transparent from about 350 nm to about 8 µm wavelength.
Tantalum pentoxide is a colourless solid that occurs in two modifications, with the low-temperature T-form reversibly changing into the H-modification, which is stable above this temperature, at 1360 °C. The T-modification has a crystal structure related to that of T-niobium(V) oxide with the orthorhombic subcell. The T modification has a crystal structure related to T-niobium(V) oxide with the orthorhombic subcell, but is complicated by its chemical (impurities with oxides of other metals) and structural variability. It is insoluble in acids except hydrofluoric acid.
In semiconductor technology, tantalum pentoxide is used as a so-called high-k dielectric for on-chip capacitors. In contrast to the commonly used silicon dioxide (SiO2), which has a relative permittivity of 3.9, the relative permittivity of tantalum pentoxide is between 24 and 28, depending on the manufacturing process.
The oxide deposition is carried out by atomic layer deposition (ALD) or chemical vapour deposition (CVD). The preferred base material of the process is the volatile tantalum complex pentakis(dimethylamino)tantalum (Ta[N(CH3)2]5), which is accessible via tantalum pentachloride (TaCl5), an important intermediate product in tantalum production.
With a value of 9-10, tantalum carbide (TaC) has almost the hardness of diamond and is used, for example, for coating engine nozzles and cutting tools.
At 3880 °C, the carbide has one of the highest melting points of all known materials - only tantalum hafnium carbide has an even higher melting point. If the material is sub-stoichiometric with the formula TaC0.89, the melting point rises to almost 4270 K (4000 °C) and is thus again higher than that of hafnium carbide. In addition to tantalum(IV) carbide TaC, tantalum(II) carbide Ta2C is also known, which has a melting temperature of 3500 °C and a density of 15 g/cm3.
Melting point: 3,020 °C
Atomic mass: 180.94788 u
Boiling point: 5,457 °C
Electron configuration: [Xe] 4f145d36s2
Atomic number: 73