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顯示從 8月, 2021 起發佈的文章

The physical and chemical properties of tungsten oxide and its preparation method

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  Tungsten trioxide   is a powder metallurgical raw material for the production of cemented carbide and tungsten products. According to the national standard (GB/T 3457-1998), it is divided into two types: tungsten trioxide (yellow tungsten for short), with the molecular formula WO3, and blue tungsten oxide (blue tungsten for short, which is a mixed tungsten oxide). W20O58. Yellow tungsten is light yellow crystalline powder, and blue tungsten is dark blue or blue-black crystalline powder. The physical and chemical properties of tungsten oxide Tungsten trioxide  is a light yellow triclinic powder crystal. When the temperature is higher than 740°C, it turns into orange tetragonal crystals, and returns to the original state after cooling. It is stable in the air, the melting point is 1473°C, the boiling point is higher than 1750°C, and the relative density is 7.16. Tungsten trioxide is the most stable kind of tungsten oxide. It is insoluble in water and inorganic acids except hydrofluoric

The main use of boron carbide B4C powder

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  Overview of Boron Carbide B4C Powder Boron carbide B4C powder  has the characteristics of low density, high strength, good high temperature stability, and good chemical stability. Therefore, it is widely used in wear-resistant materials, ceramic reinforcement phases, especially lightweight armor, reactor neutron absorbers, etc. In addition, compared with diamond and cubic boron nitride, boron carbide is easy to manufacture and low in cost, so it is more widely used. In some places, it can replace expensive diamonds, usually used for grinding, grinding, drilling, etc. Boron carbide B4C powder has the characteristics of high purity, small particle size distribution, and large specific surface area. B4C powder is a synthetic superhard material with a hardness of 9.46; a microhardness of 56-6200Kg/mm2, a ratio of 252g/cm3, and a melting point of 2250 degrees Celsius. Application of Boron Carbide B4C Powder 1. Control nuclear fission Boron carbide B4C powder  can absorb a large number of

The properties and application of calcium dodecyl stearate

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  Overview of calcium dodecyl stearate Calcium dodecyl stearate , chemical formula: (C18H35O3) 2CA molecular weight: 638.5, white to light yellow fine powder. Calcium dodecyl stearate is a flaky or needle-like crystal chemical substance with a melting point of 82-93°C. Flammable and low toxicity. Insoluble in water, soluble in ethanol, ether and chloroform. Application of calcium dodecyl stearate The main use of calcium dodecyl stearate: widely used in lubricants, stabilizers, plastics and rubber additives. Calcium lauryl stearate is used as a lubricant and release agent for constant temperature and various plastic processing, and is an excellent rubber and plastic additive. Calcium dodecyl stearate is also used in organic synthesis. Calcium dodecyl stearate price The price of  calcium dodecyl stearate  varies randomly with factors such as production cost, transportation cost, international situation, exchange rate, and market supply and demand of calcium dodecyl stearate. Tanki New Ma

An ultra-high temperature structural ceramic material: zirconium diboride ceramics

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  Overview of Zirconium Diboride ZrB2 Powder Zirconium diboride (ZrB2)  is a highly covalent refractory ceramic material with a hexagonal crystal structure. It is an ultra-high temperature ceramic (UHTC) with a melting point of 3246°C. Its relatively low density is about 6.09 g/cm3 (due to hafnium impurities, the measured density may be higher) and good high-temperature strength make it a candidate material for high-temperature aerospace applications, such as hypersonic flight or rocket propulsion systems. It is an unusual ceramic with high thermal and electrical conductivity, and has the same characteristics as the same structure of titanium diboride and hafnium diboride. Zirconium boride is a chemical substance and its molecular formula is ZrB2. Nature gray hard crystals. Zirconium boride has three components: zirconium monoboride, zirconium diboride, and zirconium triboride. Only zirconium diboride is stable in a wide temperature range. Industrial production is mainly based on zirco

The efficacy and role of potassium myristate in skin care cosmetics

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  Many consumers see the chemical substance "potassium myristate" in some cosmetics, but don't know the efficacy and function of this substance, and want to know if products containing potassium myristate are good. This article introduces the effects, effects and effects of potassium myristate on the skin. Potassium myristate , the English name is POTASSIUM MYRISTATE, alias: potassium myristate. The main functions of potassium myristate in cosmetics and skin care products are detergents, foam boosters, and surfactants. The risk factor is 1, which is relatively safe and can be used with confidence. Generally, it has no effect on pregnant women. Potassium myristate is not acne-causing.  Potassium myristate has a good cleansing effect and has a certain stimulating effect on dry and sensitive skin. It has a certain stimulating effect on eyes and skin, and has good decontamination, dispersion, emulsification, lubrication and foaming capabilities. Overview of Potassium Myristat

Preparation method of spherical AlSi7Mg powder

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  The spherical powder AlSi7Mg mainly  has the characteristics of high spherical shape, smooth surface, fewer satellite spheres, low oxygen content, uniform particle size distribution, good fluidity, and high bulk density and tap density. The particle size is generally 0-45μm, 0-53μm, 15-45μm, 15-53μm, 45-105μm. Tanki New Materials Co., Ltd. can also customize the required particle size according to customer needs. At present, the preparation methods of spherical AlSi7Mg powder can be divided into: reduction method, electrolysis method, carbonyl decomposition method, grinding method, atomization method, etc. according to the preparation process. Among them, spherical AlSi7Mg powder produced by reduction, electrolysis and atomization methods is more commonly used in the powder metallurgy industry as a raw material. However, the electrolysis method and the reduction method are limited to the production of elemental metal powders and are not applicable to alloy powders. The production of

Prospects for the development of aluminum-aluminum ceramics

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  The Development Prospect of Aluminum Nitride AlN Ceramics Aluminum nitride  has excellent thermal, electrical and mechanical properties. Aluminum nitride ceramics have attracted widespread attention from researchers at home and abroad. With the rapid development of modern science and technology, higher requirements have been placed on the properties of the materials used. Aluminum nitride ceramics will also be more widely used in many fields! Despite the unremitting efforts of many researchers over the years, great progress has been made in the research of powder preparation, forming, and sintering. However, as of April 2013, the commercialization of aluminum nitride is not high, which is also a key factor affecting the further development of aluminum nitride ceramics. In order to promote the further development of aluminum nitride research and application, the following two research tasks must be done. Research low-cost powder preparation technology and methods! The main factor rest

In-situ synthesis of cobalt boride nanoarrays: a highly efficient electrocatalytic catalyst for total water splitting

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  The global energy crisis and environmental pollution caused by the burning of fossil fuels have prompted researchers to search for clean and renewable energy. Electrocatalytic decomposition of water to produce hydrogen and oxygen is a potential strategy to solve this energy and environmental problem. However, the decomposition of water is a very difficult reaction process in thermodynamics. It usually requires a higher overpotential to achieve the complete water splitting process of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the same time, which greatly hinders The development of electrocatalytic total water splitting. Therefore, the development of a dual-functional water splitting catalyst with high efficiency and abundant earth resources is highly attractive. In recent years, the research on transition metal-based dual-functional catalysts (including alloys, oxides, hydroxides, sulfides, phosphides, etc.) has achieved great success and is considered to

The main application of dysprosium oxide Dy2O3 products

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  Overview of dysprosium oxide Dy2O3 Dysprosium oxide Dy2O3  is a white crystalline powder with strong magnetism, and its magnetic force is 12.8 times that of ferric oxide. The relative density is 7.81 (27/4°C), and the melting point is 2391°C. It is insoluble in water, but soluble in acid to generate the corresponding acid dysprosium salt solution. It is easy to absorb carbon dioxide from the air and become dysprosium basic carbonate. It is obtained by burning dysprosium hydroxide, dysprosium carbonate or dysprosium nitrate at 900°C. Used in industrial sectors such as electronics, radio and atomic energy. Application of Dysprosium Oxide Dy2O3 Dysprosium oxide  is a white powder, slightly hygroscopic, and can absorb moisture and carbon dioxide in the air. Dysprosium oxide is an important rare earth material with a wide range of uses. In addition to the nuclear reactor control rod used in the atomic energy industry, it can also be used for metal halide lamps, magneto-optical memory mate

Physicochemical properties and application of molybdenum disilicide MoSi2

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  Molybdenum disilicide MoSi2 powder overview Molybdenum disilicide  is an inorganic compound with the chemical formula MoSi2, which is a gray metallic solid. Insoluble in most acids, but soluble in nitric acid and hydrofluoric acid. The radii of the two kinds of atoms are not much different, the electronegativity is relatively close, and they have properties similar to those of metals and ceramics. Molybdenum disilicide is conductive and can form a passivation layer of silicon dioxide on the surface at high temperatures to prevent further oxidation. It is used in high-temperature anti-oxidation coating materials, electric heating elements, integrated electrode films, structural materials, reinforcing agents for composite materials, wear-resistant materials, and connecting materials for structural ceramics. Physicochemical properties of molybdenum disilicide MoSi2 Molybdenum disilicide MoSi2  is an intermediate phase with the highest silicon content in the Mo-Si binary alloy system, an