Rhywogaethau Cysylltiedig Niobium

Powdwr niobium ar gyfer meteleg

Yn gyffredinol, mae powdr Niobium yn cael ei baratoi gan feteleg powdr, ac mae ei ymddangosiad yn llwyd tywyll. Fe'i defnyddir ar gyfer prosesu deunyddiau crai a chynhyrchu gwiail weldio. Yn ôl gwahanol ofynion cynnyrch, rhennir powdr niobium yn dri gradd: FNb-1, FNb-2 a FNb-3. Dylai powdr niobium FNb-1 a FNb-2 basio trwy ridyll 150um (100 rhwyll), dylai powdr niobium FNb-3 basio trwy ridyll 180um (80 rhwyll).

Aloi Zirconium Niobium

Aloi a ffurfiwyd trwy ychwanegu zirconium metel i niobium metel. Mae zirconium yn bodoli'n bennaf mewn cyflwr datrysiad solet mewn aloi niobium. Pan fo swm hybrin o garbon a charbon neu swm hybrin o garbon yn cael ei ychwanegu, mae ychydig bach o carbidau ac ocsidau yn cael eu gwasgaru a'u dyddodi. Felly, mae niobium zirconium yn gwneud i'r aloi fod â chryfder uchel ac ymarferoldeb plastig da. Gwrthiant ocsideiddio da ac ymwrthedd cyrydiad metel alcali.

Niobium pentocsid

Mae niobium ocsid a geir trwy ddull echdynnu hylif - yn bowdr gwyn neu felyn golau, a ddefnyddir ar gyfer cynhyrchu powdr niobium, bariau niobium a chynwysorau ceramig. Yn ôl gwahanol ofynion defnydd a chyfansoddiadau cemegol, rhennir y cynhyrchion yn dri gradd: FNb2O5-1, FNb2O5-2, a FNb2O5-3.

Tantalum a Niobium

It makes sense to put them together and introduce them, because they are the same family in the periodic table, with very similar physical and chemical properties, and they are often "inseparable". "twin brothers". In fact, when people first discovered niobium and tantalum in the early nineteenth century, they thought they were the same element. About forty-two years later, they were separated for the first time by chemical methods, and it became clear that they were two different metals. Like tungsten and molybdenum, niobium and tantalum are rare high-melting-point metals, and their properties and uses have many similarities.

Since they are called rare high melting point metals, the most important feature of niobium and tantalum is of course heat resistance. Their melting points are as high as more than 2,400 degrees Celsius and nearly 3,000 degrees Celsius respectively. Not to mention that ordinary fires can't burn them, even the sea of flames churning in the steel-making furnace can't help them. It is no wonder that tantalum metal is a very suitable material in some high-temperature and high-heat sectors, especially in the manufacture of vacuum heating furnaces of more than 1600 degrees.

The excellent properties of one metal can often be "transplanted" into another metal. Adding niobium as an alloying element to steel can increase the high temperature strength of the steel and improve the processing performance. Niobium and tantalum cooperate with a series of metals such as tungsten, molybdenum, vanadium, nickel, and cobalt to obtain "thermally strong alloys" that can be used as structural materials for supersonic jets, rockets, and missiles. Scientists have begun to turn their attention to niobium and tantalum when developing new high-temperature structural materials; many high-temperature, high-strength alloys have this pair of twin brothers participating.

Mae niobium a tantalwm eu hunain yn ddygn iawn, ac mae eu carbidau'n fwy ymwrthol, nad yw'n wahanol i twngsten a molybdenwm. Mae'r carbid smentio wedi'i wneud o niobium a tantalum carbide gan fod gan y matrics gryfder uchel, ymwrthedd cywasgu, ymwrthedd gwisgo a gwrthsefyll cyrydiad. Ymhlith yr holl gyfansoddion caled, mae gan carbid tantalwm y caledwch uchaf. Gall yr offeryn a wneir o garbid carbid tantalwm wrthsefyll tymheredd uchel o dan 3800 gradd, gall ei galedwch gyd-fynd â diemwnt, ac mae ei fywyd gwasanaeth yn hirach na charbid twngsten.