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Zirconium (chemical. symbol Zr) a steel-gray metal with a yellowish tinge, obtained from ore or concentrate by melting of zirconium waste. It is malleable and ductile, almost as gold, paramagnetic, corrosion-resistant heat-resistant metal. It is resistant to chlorinated and sea water, ammonia, alkalis, acids, retards radiation, does not lose its qualities at high or cryogenic temperatures. Usually used in alloy with other metals. that brings out not only its extraordinary properties, but also increases manufacturability.
|The atomic number of Zr||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. 40||91,2||0, 1, 2, 3, 4||8,5||1855°C||4409°C||19,2|
In ore deposits of zirconium are literally scattered in different parts of the world where it is found in the form of amorphous oxides and salts, as well as in the form of single crystals, for example, in North Carolina, USA. Such crystals deposits in Nigeria sometimes reach a weight of more than kilograms. The richest deposits are located in North America, Australia, South Africa and India. In the ore Zirconia is often found together with the hafnium — for properties closest to it in the metal. Natural resources of zirconium in Russia are assessed at 10% of the world. In 1799, the metal was first isolated in the form of dioxide, a German chemist Clarocom from the mineral zircon. Zr is smelted from enriched ore concentrate in which the content of zirconium dioxide reaches 60−65%.
Percentage composition of zirconium alloys
The unique properties of this metal has long attracted jewelers, Anodized Zirconia can buy any shade, providing tremendous opportunities for the realization of the most daring artistic ideas. If you want something original and unusual, you should pay attention to the jewelry made of Zirconia. These products are elegant, well thought out and well-executed, attractive for its completeness. For this reason, they are highly appreciated in the global market.
The chemical composition of their foreign counterparts Zirconia
Metallurgy and energy
The mineral zircon dioxide and ZrO2 are part of the refractory lining of metallurgical furnaces, high-temperature coating crucibles, refractory pipes, etc. our engineers have developed the technology of pipes of any profile from zirconium alloy KTC-110,. These pipes are relevant in heat TVEL. They can operate at temperatures above 2000 °C without losing the technological properties.
This is quite an expensive metal and was initially used for alloying steel. By grinding the grain of the alloy, the zirconium not only gives the steel the heat resistance and corrosion resistant, but also increases manufacturability. Alloying Zirconia steel pipes leads to twice decrease of the corrosion losses. With a square meter of surface-alloyed tubes lost nearly 1 gram less metal for the year. Zirconia is a good deoxidizer. It makes the alloys of copper heat-resistant with a slight loss of electrical conductivity. He also enters into the composition of brass and bronze. In the hydrogenation (saturation with hydrogen) zirconium several times increasing in volume, much more than when heated, allowing you to connect the unconnected materials, when neither soldering nor welding is not applicable. It’s a useless method in the manufacture of two-layer pipes made of materials of different heat resistance, for example, of brass or bronze — tungsten. So if the sleeve is made of steel and aluminum to put on one ring of Zirconia and subjected to hydrogenation for one hour at 400 °C, steel and aluminum stick together tightly. In metallurgy of zirconium dioxide or of minerals of zircon and baddeleyite produced refractory bricks for industrial furnaces, crucibles for melting metals, etc refractory products.
Up to 25% of zirconium is consumed in the manufacture of ceramics, enamels and glazes. More than one hundred thousand tons of concentrate ZrO2 in a year is used to make not only domestic, but also electrical ceramics: high-voltage insulators, and other technical porcelain with high resistance. Ceramics based on Zirconia is used for chemical crucibles, mortars, etc. in ultrasonic transducers and medical devices, pyroelectric detectors of infrared radiation.
Narrow cross-section of capture of thermal neutrons plus heat resistance allow for the use of Zirconia for fuel elements of nuclear boilers. This is one of the basic structural materials of nuclear reactors. Ukraine is developed industrial technology of production of pipes of a wide range of zirconium alloy KTC-110 including components for fuel elements. This metal holds radiation. In the cardiology center of Nizhny Novgorod in the x-ray Department carried out the study. Thin zirconium plate was protected from radiation much better than several layers of lead aprons.
Medicine and life
In the cardiology center of Nizhny Novgorod conducted the study. In the x-ray Department of a thin Zirconia plate delayed radiation is much stronger than multiple layers of protective lead aprons. Find out what this metal absorbs and neutralizes harmful radiation. Regular wearing of articles of zirconium has a beneficial effect on health. In the case of chronic disorders the treatment process often passes through a period of exacerbation. In this case, the product must be removed and later put on again when the discomfort decreases. The disease subsides after a few cycles. Biological inertness among the other advantages of cubic Zirconia allow it to be used for the production of injection needles, suturing of bone fragments and placement of dentures. This metal is exclusive of household utensils and Cutlery. Regular wearing of articles of zirconium has a beneficial effect on health.
Pyrotechnics and ammunition
Powdered zirconium in the presence of oxidizing agents (e.g. potassium chlorate) burns at a temperature of 4650 °C with the release of bright light. Used in fireworks, tracer bullets, photos bombs, in recent years — for laser pumping.
The resistance of zirconium to the action of superheated steam, acids, industrial condensate zirconium tubes is relevant in the chemical industry, food processing, pulp and paper industry, Biological inertness and meets the most stringent sanitary standards allows the use of Zirconia for the food industry and in the home, cookware manufacturing, steam condensers and injection needles.
Rods made of zirconium alloy produce, hot-pressed and cold-rolled, forged thickness of 4.5 — 81 mm and a length of seven meters. Use an alloy of zirconium with niobium (1 — 2,5%) or alloy Э635. Precision fabrication can be: normal and high accuracy. They are a reliable structural material in the production of heat resistant parts of nuclear reactors, fuel element cladding and the fuel Assembly.
Bars godenovo Zirconia
Such rods with pseudocrystalline surface (the van Arkel rods) — a special class of products of zirconium highest purity obtained by the technology godenovo refining. Of them produce wire, electrodes and parts of vacuum devices.
Alloys of zirconium alloyed with 2.5% of niobium is produced cold-rolled sheets under the order of any parameters. The annealing is conducted in vacuum, the surface is etched. These sheets have high corrosion resistance. Used as a basis for lids fuel assemblies of nuclear reactors, chemical tanks and reactors fragments of marine equipment.
Hard drawn wire
From zirconium alloys doped 1 — 2,5% of niobium produced cold rolled wire Ø 0,7 — 4 mm. This wire serves as the basis for the production of parts of valves for nuclear reactors, it is also necessary for welding tubular parts.
The cathodes of zirconium
Relevant for the application of highly durable coatings of nitrides, oxides, oxynitrides Zirconia on the edges of cutting tools from hard alloys on turbine blades, elements of friction pairs (trees, bushes). The service life of products increases 10 times. In dentistry through zirconium cathodes is applied wear-resistant coating on dental crowns.
Buy at best price
The company «Electrocentury-Steel» offers a wide range of products based on zirconium:
- wire (Ø 0,7 — 4 mm);
- rod Ø up to 150 mm;
and articles of zirconium, according to customer’s drawing:
- cathodes for sputtering etc.
Supply certified products of rare metals and alloys at the best prices. In the specifications reflected data on the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. We also work with retail buyers. A high level of service, the product compliance with GOST and international quality standards, efficient service are the face of our company. Supply zirconium pipe standard and custom sizes in the shortest possible time from warehouses located on the territory of Russia and Ukraine. High quality, affordable prices and a wide range of products define the face of our company. Becoming our regular customer, You will be able to rely on the system of discount discount. Cooperation with us will help You to implement any engineering plans. Waiting for Your orders on the website evek.org.