The common sense of Zirconium
Zirconium is silver gray lustrous metallic, density of 6.49, the melting point of 1852℃, the boiling point of 4377℃. Chemical property of zirconium is inert. The dense zirconium is relatively stable in the air, the surface will form an oxide covering layer and lose the metallic luster when it is heated. Zirconium powder is easy to burn in the air; the fine zirconium wire is available to light. Zirconium has a strong affinity for oxygen, it can take the oxygen in the Magnesium Oxide, thorium oxide, and beryllium oxide, and it will become the zirconium dioxide. What's more, zirconium has a strong hydrogen absorption property, so it can be used as hydrogen storage materials. Zirconium can cause a reaction with nitrogen in the high temperature. Zirconium has corrosion resistance, and it can't react to dilute hydrochloric acid, dilute sulfuric acid and alkali solution, but it's easy to be dissolved in hydrofluoric acid and nitromurlatic acid. High temperature, zirconium and non-metallic elements and many metal elements have a reaction, and it will generate the solid solution compounds.
The content of zirconium in the crust is 0.025%, ranking the twentieth. The minerals containing ZrO2 of more than 20% has a dozen kinds, but the industries only use two kinds of zircon (ZrSiO4) and bad deleyite (ZrO2). Zircon can accrete with the limonite, monazite and rutile, they can also be found in the sand on the beach. All of the zircons contain hafnium oxide (HfO2) and radioactive substances, radioactive strength is generally in order of magnitude of 1 * 10-7 milli Curie / g.
Zircon, baddeleyite is the main source of zirconium, zircon, joined the amount of petroleum coke, chlorine can be fed into when the temperature reaches 1000℃ , at this time, we can get the zirconium tetrachloride (ZrCl4), and once its vapour contact the melt magnesium, the zirconium can be got. The high purity zirconium metal can be produced by the thermal decomposition method of iodide.
ZrCl4 is a solid at room temperature, but it will sublime at 437℃. Therefore income in condenser in ZrCl4 for gaseous coagulated, good control of heat transfer rate and other conditions, the high density products can be got. ZrCl4 can be reduced to the ZrCl3 and ZrCl2. They are the main components during the electrolytic preparation of zirconium metal. For example, the preparation of general industrial zirconium doesn’t need the separating hafnium. And we can produce the ZrCl4 by the sublimation purification legal, and then the zirconium sponge can be prepared with magnesium reduction.
The content of zirconium in the crust is 0.025%, ranking the twentieth. The minerals containing ZrO2 of more than 20% has a dozen kinds, but the industries only use two kinds of zircon (ZrSiO4) and bad deleyite (ZrO2). Zircon can accrete with the limonite, monazite and rutile, they can also be found in the sand on the beach. All of the zircons contain hafnium oxide (HfO2) and radioactive substances, radioactive strength is generally in order of magnitude of 1 * 10-7 milli Curie / g.
Zircon, baddeleyite is the main source of zirconium, zircon, joined the amount of petroleum coke, chlorine can be fed into when the temperature reaches 1000℃ , at this time, we can get the zirconium tetrachloride (ZrCl4), and once its vapour contact the melt magnesium, the zirconium can be got. The high purity zirconium metal can be produced by the thermal decomposition method of iodide.
ZrCl4 is a solid at room temperature, but it will sublime at 437℃. Therefore income in condenser in ZrCl4 for gaseous coagulated, good control of heat transfer rate and other conditions, the high density products can be got. ZrCl4 can be reduced to the ZrCl3 and ZrCl2. They are the main components during the electrolytic preparation of zirconium metal. For example, the preparation of general industrial zirconium doesn’t need the separating hafnium. And we can produce the ZrCl4 by the sublimation purification legal, and then the zirconium sponge can be prepared with magnesium reduction.
