Praseodymium brand, chemical structure
General characteristics
Praseodymium is the third group of the table of Mendeleev, where indicated by the chemical symbol Pr. Atomic number No. 59, Refers to the lanthanides. the atomic weight is 140.9. Celebrate the opening of this metal belongs to the Austrian chemist von Welsbach. In 1885 he was able to separate rare earth metal Didim, this was considered indivisible, neodymium and praseodymium. The word praseodymium is translated from Greek as «light green twin». The lithosphere contains this element up to 9 g/t. Get it from a mixture of other rare earth elements extraction and chromatographic separation. This element is concentrated along with the neodymium, etc. in LREE. Then, the praseodymium is separated from the neodymium by electrolysis or metallothermic at t° 850 °C.
| The atomic number of Pr | Atomic (molar) mass, g/mol | The degree of oxidation | Density [g/cm3] | The melting temperature t°C | The boiling point of t°C | The heat of fusion kJ/kg |
|---|---|---|---|---|---|---|
| No. 59 | 140,9 | Of 6.77 | 3, 4 | 1131°C | 3512°C | 11,3 |
Chemical quality
Under normal conditions, is oxidized slowly, but rapid heating ignited, forming a mixture of 3-and 4-valent oxide. Prokaeva in the atmosphere CH4 or H2, get oxide Pr2 O3. In the atmosphere of O2 pressure of 10 MPa is formed dioxide PrO2.
Application
Is the basis of magnetic alloys with neodymium. In the laser optics is used to generate infrared radiation with a wavelength of 1050 nm when the development of solid and liquid lasers. Praseodymium oxide gives the glass a pale green color. used to optimize the performance of thermoelectric alloys of rare earth elements with a coefficient of thermo-EMF 55 mV/K. the Alloy of this metal with silicon and germanium — superconducting material. Praseodymium is used in vacuum technology to improve the efficiency of cathodes in the production of magnetic cores. Salts of praseodymium help in managing the process of nuclear magnetic resonance. This metal is used for alloying steel, in the manufacture of ceramics and in medicine. In alloy with other precious metals it is made from the following types of rentals: circle, wire, sheet, tape.
Supply
We provide a wide selection of products from alloys of praseodymium. All products are certified. In the technical documentation included data on chemical composition, limiting the percentage of impurities; mechanical qualities of the products. We accept orders for production of titanium alloy ТЛ3 standard and custom sizes at the best price we can buy in bulk any semi-finished products for large-scale projects. We are also happy to work with retail buyers. European level of service and speed of service are the face of our company.
Buy at best price
Provide for the implementation of an unlimited range of hire on the basis of rare metals the highest quality at a competitive price. If you are not sure, it offers experienced managers who are always on call and ready to provide advice. Making an order from us, You will get certified products that comply with Russian and international quality standards in the shortest possible time. If You value your time, get in touch today with our branch offices in Russia or Ukraine, or make an order through the Internet.
