How to obtain high purity molybdenum powder

How to obtain high purity molybdenum powder? A lot of people don't know, here are introduced:

High purity molybdenum powder used for high voltage large current molybdenum wire of semiconductor devices, audio-visual equipment, camera parts and the target gate electrode material in high density of integrated circuit, etc.

To the preparation of high purity molybdenum powder, you must first obtain the high pure molybdenum trioxide or high purity halide. To obtain high pure molybdenum trioxide process are:

Plasma physical vapor deposition method

With common air plasma treatment of molybdenum trioxide, molybdenum trioxide boiling point than most of the characteristics of low impurity, make its in air plasma flame volatilizes quickly, and bring a lot of cold air outside the plasma flame make gaseous molybdenum trioxide chilling, ultra pure molybdenum trioxide powders.

Ion exchange method,

Powder materials will be dissolved in polytetrafluoroethylene container water mixing, and then to the container at a speed of 1 L/h with concentration of 30% H2O2. The solution obtained by H cation exchanger, the solution is heated to 95 ℃ in the container, the suction pressure at about 25 Pa keep 5 hours, forming a precipitate after enrichment, is the high pure molybdenum trioxide.

Chemical purification method

Through recrystallization for many times, to obtain high purity ammonium molybdate, high pure molybdenum trioxide and calcination.

After winning high pure molybdenum trioxide, the traditional hydrogen reduction method and the plasma hydrogen reduction method can obtain high purity molybdenum powder. This several kinds of preparation technology are application, but the specific technical ideas and details are not public.

To obtain high purity halide process principle is: will industrial waste molybdenum oxide or molybdenum metal (such as sintered bar clamp scrap and waste molybdenum wire, molybdenum materials, etc.) get halide halide (generally for molybdenum pentachloride), and then under the condition of the high temperature of 550 ℃ or so fractionation of halogenated molybdenum processing, make the volatile impurities, get deep purification of halogenated molybdenum (allegedly purity can reach 5 N), at last, by hydrogen chloride hydrogen flame or plasma flame reduction, get high purity molybdenum powder.

What is the chromium powder

What is the chromium powder? Have a lot of people may not know, with the introduction of the chromium powder is below:

Chromium powder is to grind metal chromium chromium powder is light, heat resistant coatings, also can be used as abrasive, glass, pottery and porcelain colorants, chemical synthesis catalyst. Chrome alum, dichromate is used as leather tanning, mordant dyeing of fabrics, impregnant and various pigments. Chrome plated and chromizing can make the steel and copper, aluminum and other metal anti-corrosion surface formation, and the bright and beautiful, a large number of used in furniture, automotive, construction and other industries. In addition, also used to produce large amounts of refractory chrome ore.

The purpose of the nickel powder

Nickel powder is mainly used in coating and plastic for shielding electromagnetic conductive paint dry involves the radio frequency interference, make all kinds of high gloss decorative paint and plastic, instead of aluminum powder in aqueous system for anti-corrosion paint, etc., fine particle spherical nickel powder can be used in conductive ink.

In diamond tools, tire body refers to the package, metal diamond sintered body, and the role of the tire body is holding diamond, make its have the effect of cutting, without peeling off prematurely. Tire body generally consists of a variety of metal elements, mainly USES the low melting point metal powder as binder, such as nickel powder, etc.

Construction with diamond drill bit, cut pieces, such as oil and natural gas mining diamond bit, carbide drill the tire body adhesive materials are mostly using nickel powder; Metal material processing, automobile, motorcycle mechanical grinding processing tools mostly USES the diamond abrasives, such as the matrix materials are mostly using nickel powder. Including the carbonyl nickel powder, nickel powder and nickel powder.

What is the Tin-Powder

Tin-Powder, the melting temperature of 231.88 ℃. The boiling point of 2270 ℃. Relative density 7.28. Soluble in concentrated hydrochloric acid, sulfuric acid, nitric acid and aqua regia, hot caustic solution, slowly dissolve in cold heat diluted hydrochloric acid and dilute nitric acid and dilute sulphuric acid, cold caustic solution, in acetic acid to dissolve more slowly. Stability in the air, but tin powder oxidation more easily, especially in the moist air to oxidation. Electronic industrial materials, used for high purity reagent.

Tin is at present our country one of the high degree of development and utilization of minerals in non-ferrous metal, widely used in metallurgy, electronics, electrical, chemical, building materials, machinery and food packaging industries. With the continuous development of utilizing trends on a global scale, electronics makers will be more tin powder material is applied to the products. At the same time, along with the unceasing enhancement of environmental consciousness, tin powder, non-toxic environmental protection properties will make it in the future be continuously applied to medicine, chemical industry, light industry, food, health care, art supplies, and other areas of the packaging. The importance of tin powder has been more and more obvious.

The purpose of the titanium powder

Titanium powder, titanium hydride powder: purity: 95-99.4% of all kinds of sexual shape: titanium powder: the product is silver gray irregular shape powder, have big inspiratory capacity, under the condition of high temperature or edm flammable.

Titanium powder, titanium hydride powder: purity: 95-99.4% of all kinds of sexual shape: titanium powder: the product is silver gray irregular shape powder, have big inspiratory capacity, under the condition of high temperature or edm flammable. Hydrogenated titanium powder: the product is dark gray irregular shape powder. Use titanium powder and titanium hydride powder is a very versatile metal powder. Is powder metallurgy, metal material additives. Shanghai juji agent and metal ceramic, surface, aluminum alloy additives, electric vacuum getter, spray, plating and other important raw materials.

What is the Hydrochloric acid natrium

Hydrochloric acid natrium piece ketone is mainly used for to remove opioids convalescence auxiliary treatment, the drug addicts can make rid of opioid addicts d normal life, prevent or reduce the relapse.

Warm reminder: belong to pregnancy risk class C drug. Experiments show that the dose of 140 times of clinical dosage (according to the weight is about 100 mg/kg), there may be destroying embryos of rabbit and rat, and the rat can obviously increase the proportion of false pregnancy, and to reduce the conception rate of female mice. But there is no effect on fertility in man's report. About whether this product can vent it is unclear how from human breast milk. Have an impact on whether labor is also unknown. So for pregnant women and nursing mothers, it should be careful to use this product.

What is the Trehalose

Trehalose is also called the leak reed, mushroom sugar, sugar, etc. Is a kind of safe and reliable natural sugars. Trehalose is made up of two glucose molecules made up of 1, 1 - glycosidic bond is not a reducing sugar, there are three kinds of isomer trehalose (alpha, alpha), trehalose (beta, beta) and the new trehalose (alpha, beta), and for a variety of bioactive substances with nonspecific protection. Trehalose in nature, there are many edible plants and animals, and microorganisms are widely exist in the body, such as People's Daily life in edible mushrooms, Marine algae, beans, shrimp, bread, and beer yeast fermentation has higher content of trehalose in food.

Application of trehalose in food industry

As with other sugars, trehalose can be widely used in the food industry, including beverages, chocolate and candy, baking products and frozen food.