Spesies Berkaitan Niobium

Serbuk niobium untuk metalurgi

Serbuk niobium biasanya disediakan oleh metalurgi serbuk, dan penampilannya adalah kelabu gelap. Ia digunakan untuk memproses bahan mentah dan menghasilkan rod kimpalan. Mengikut keperluan produk yang berbeza, serbuk niobium dibahagikan kepada tiga gred: FNb-1, FNb-2 dan FNb-3. Serbuk niobium FNb-1 dan FNb-2 harus melalui penapis 150um (100 mesh), serbuk niobium FNb-3 harus melalui penapis 180um (80 mesh).

Aloi Niobium Zirkonium

Aloi yang terbentuk dengan menambahkan logam zirkonium kepada logam niobium. Zirkonium terutamanya wujud dalam keadaan larutan pepejal dalam aloi niobium. Apabila terdapat sejumlah surih karbon dan karbon atau sejumlah surih karbon ditambah, sejumlah kecil karbida dan oksida tersebar dan dimendakan. Oleh itu, niobium-zirkonium menjadikan aloi mempunyai kekuatan tinggi dan kebolehkerjaan plastik yang baik. Rintangan pengoksidaan yang baik dan rintangan kakisan logam alkali.

Niobium pentoksida

Niobium oksida yang diperoleh melalui kaedah pengekstrakan cecair-cecair ialah serbuk putih atau kuning muda, yang digunakan untuk penghasilan serbuk niobium, bar niobium dan kapasitor seramik. Mengikut keperluan penggunaan dan komposisi kimia yang berbeza, produk dibahagikan kepada tiga gred: FNb2O5-1, FNb2O5-2, dan FNb2O5-3.

Tantalum dan 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.

Niobium dan tantalum sendiri sangat kuat, dan karbida mereka lebih tahan, yang tidak berbeza dengan tungsten dan molibdenum. Karbida bersimen diperbuat daripada niobium dan tantalum karbida kerana matriks mempunyai kekuatan tinggi, rintangan mampatan, rintangan haus dan rintangan kakisan. Di antara semua sebatian keras, tantalum karbida mempunyai kekerasan yang paling tinggi. Alat yang diperbuat daripada karbida tantalum karbida boleh menahan suhu tinggi di bawah 3800 darjah, kekerasannya boleh menandingi berlian, dan hayat perkhidmatannya lebih lama daripada karbida tungsten.