Preparation, characteristics and application of silicon powder

Silicon Powder A special trapping device is used to collect and process smoke and dust escaping from an industrial electric furnace during the smelting of industrial silicon and iron-silicon. Silicon fume is the name given to the smoke and dust that escapes from an industrial electric furnace. It contains 90% SiO2, the particles are very small and average size is near nanometers. Performance and usage of silicon powder
The fine processing of silicon powder involves crushing, purifying and grinding quartz (also known as silica dioxide). It is characterized by its high purity, white colour, and a good particle size distribution. It is unique and has a wide range applications.
Silicon Powder Performance
(1) Good insulation is achieved by silicon powder: Due to its high purity and low impurity levels, as well as the stable performance of the product, it has excellent insulation properties and resistance to arcs.
(2) Silicone powder can reduce exothermic peak temperatures of the curing reaction, and reduce linear expansion coefficients and shrinkage rates of the cured products, thereby preventing cracking and eliminating internal stresses.
Silicon powder does not react easily with other substances. Silicon powder also doesn’t chemically react to most acids or alkalis. The particles are uniformly distributed on the surface and exhibit strong corrosion resistance.
(4) The particle size of the silicon powder is appropriate, which reduces and eliminates precipitation and delamination in use. It also increases the strength, tensile, and compressive of the finished product. Improve flame retardant properties.
(5) Silicone treated with silane coupling is a good wettability for resins of various types, has good performance in adsorption, and can be easily mixed.
(6) Silicon powder The organic resin is filled with this filler, which improves performance while reducing the cost.
Preparation silicon powder
The preparation of silicon using blocks of silicon as the raw material can be done in many ways. There are four methods that produce better results and have a wider application: the Raymond method (also called the roller mill), the disc grinding method and the punching-and-spinning method. The Raymond method is used, as well as the roller mill, disc (also known vertical mill), and the punching and spinning methods. According to the milling principle, the first 3 are extrusion crushers, while the last are impact crushers. The structure of each mill is very different. Each mill has its own unique characteristics and its own advantages and drawbacks.

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Silicon Nitride Ceramic Preparation And Application

Silicon nitride Ceramic is an organic material ceramic that doesn’t shrink when sintered. Silicon nitride is extremely strong, especially when hot-pressed. This is why it is considered one of the strongest materials on the planet. It has high strength and low density.

Silicon Nitride Ceramic Preparation

Si3N4 ceramics can be prepared using a variety of methods, including hot pressing, atmospheric, pressure, and hot press sintering.
Reaction sintering method (RS)
It follows the standard forming procedure. The first step is to press the silicon powder into a desired shape. After that, it is placed in a nitriding furnace, and then subjected pre-nitriding or partial nitriding, and finally sintering. The green pre-nitrided body already possesses a certain strength. There are many mechanical processes that can be done to the green body, including turning, milling and drilling. To obtain a product with minimal dimensional changes, the temperature must be above the melting points of silicon.

Hot Press Sintering
It uses Si3N4 Powder and small amounts of additives (such a MgO or Al2O3, MgF2, F2O3, etc.). It is pressed at above 1916 MPa, and heated to 1600 degrees for hot press molding or sintering. Si3N4 ceramics made by hot pressing are superior to those of Si3N4 that has been reaction sintered. They have high strength and density.

Atmospheric pressure-sintering method (PLS).
To increase the pressure of the sintering atmosphere nitrogen atmosphere, it uses the properties Si3N4 for decomposition temperature. Usually, N2 = 1atm is used, with a minimum of 1800degC. After atmospheric sintering has been completed at temperatures between 1700-1800 degC, air pressure sintering can be done at temperatures between 1800 and 2000degC.

Air pressure sintering technique (GPS).
At a pressure of 1-10 MPa and at temperatures of approximately 2000°C, silicon nitride can be air pressure sintered. High nitrogen pressure prevents silicon nitride from undergoing high temperatures. It is possible to produce a high toughness ceramic by using high temperature sintering with less sintering tools.

Silicon Nitride Ceramic Application

Silicon nitride Ceramics have exceptional mechanical properties, wear resistance corrosion resistance and other outstanding properties. This makes them widely used in many industrial areas such as metallurgy machinery energy and energy: semiconductor, chemical, aerospace and so forth.

Silicium nitride ceramics in mechanical engineering can be used to produce bearings. Cutting tools, high-temperature bolts. Drawing dies. Ball valves. Plungers. Sealing materials. Nozzles.

Hot-pressed silicon nitride ceramic tool have 5-15x higher durability than cemented carbide and 3-10x higher cutting speeds. Dispersion strengthening can be used to increase the performance and longevity of silicon-nitride tools by compounding TiC or ZrC.

Silicon nitride clay has excellent mechanical properties. It is both wear-resistant and self-lubricating. It is a good bearing material with a longer service life than other ceramic ones. It is resistant to corrosion and high temperatures, and can be used in harsh environments.

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The Main Preparation Method of Spherical Quartz Powder

What is spherical Quartz Powder?

After being purified from quartz stone, spherical quartz powder is pulverized and ultrafinely ground. The powder then goes through a certain temperature field so that its phase form, crystal form and shape change instantaneously from solid state to liquid state. Amorphous powder is made from irregularly angular particles and transformed into regular spherical pieces.

The main preparation method for spherical powder quartz is

1. Flame melting is used primarily to mass produce spheroidized quartz dust. This technology has a key feature: the heating device must have a stable temperature field, a temperature range that can be adjusted easily, and there must be no secondary pollution to quartz powder. The ball-forming principle is that the high-temperature fire spray gun produces a high temperature flame between 1600 and 2000. The powder enters the high heat flame zone and its angular surface absorbs heat. This heat is then transferred to the powder’s interior, where it is completely molten. The action of surface tension means that objects tend to be stable. Spherical is the best state for forming a ball.


2. The local thermodynamic equilibrium (or thermal plasma) is another name for this plasma. The main feature of thermal plasma is the fact that the local electron temperature, ion temp (Ti), and gas temperature in the plasma are almost identical. The thermal plasmas are arc plasma, high frequency and induction plasma.


High-frequency plasmafusion is used for the preparation of spherical quartz. This method has a moderate range, stable control, high output and can achieve a high rate of spheroidization, making it more suitable for production. The principle and procedure are similar to that of flame melting. This mainly transforms the high-temperature heat source into an plasma generator.


The working gas is compressed gas. The volume of the working gases is 10m3/h. The high-frequency generator generates heat by generating high-temperature gas at 4000-7000. The silica is carried from the top of the plasma reactor furnace to the arc region by the feeder. After melting and gasifying, the powder is then transported through the feeder. The powder is quenched using a special quencher and then collected by gravity and bag dust (nanoscale). In a matter of 1s-2s the spherical and nanoscale SiO2 can be made.


3. Chemical synthesis

To obtain silica sol, heat the silica emulsion with ammonia or ammonium bicarbonate. The gel is then treated with acid to produce hydrated spherical silica. This product has a low uranium level, which is a characteristic. However, it is also easy to agglomerate.


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The Main Preparation Methods of 3D Printing Metal Powder

3D printing represents a new form of printing technology. 3D printing metal powder, the most important material for 3D-printing metal parts, is 3D printing. The main 3D powder materials currently available are nickel-titanium alloy powder Steel, stainless, industrial, steel, bronze, titanium, nickel-aluminum, and cobalt-chromium allision, etc.
3D printing of metal powder requires good plasticity.

Three types of preparation for 3D printing metal powder are available: reduction method, electrolysis, grinding method, and atomization method. The two most common pulverizing techniques in China today are the argon-atomization method or plasma rotating electrode.
1. Argon atomization
The argon atomization method uses the fast-flowing argon gases flow to impact the metallic liquid, then break it into small particles and finally condense into a solid powder.

2. Method using a plasma rotating electrode
Plasma state is also known as the fourth state. The process of plasma rotating electro atomization (prep) is simple: The metal or alloy is made into a consumable electrode. The end of the consumable electrode melts in coaxial plasma heating source to create liquid film. The liquid film is then thrown out at high speeds to form droplets. Under the action shear stress, the molten liquid droplet is broken down further and cools to become spherical powder.

The following are some of the benefits of plasma rotating electrode metal powder:

High sphericity with a smooth surface and high loose densities, which means that the uniformity of powder spread is excellent and printing products have a high density.

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Characteristics and Main Preparation Methods of Spherical Alumina

What is spherical-alumina?

The high-temperature melting spraying method produces spheres of alumina that have high sphericity. Also, it has high levels of a phase alumina. It can be used to fill rubber, plastics, or ceramic raw materials.

Ultrafine spherical aluminum has many excellent characteristics, including high corrosion resistance, high temperatures resistance, high hardness and strength, wear resistance as well as oxidation resistance. It is widely used in metallurgy as well as electronics, national defense and aerospace, nuclear industry, and other areas. High-tech field. Presently, there is a rising annual rate of demand for ultrafine spherical allumina on both domestic and foreign markets. Therefore, it is important to explore new methods of making ultrafine powder spherical aluminum alumina.

Preparation of spherical-alumina

The spray method is used to prepare spherical aluminum. It achieves phase transition in a very short time. The product will become spherical by using the surface tension. The phase transition can be classified according to its characteristics into spray pyrolysis and spray drying or spray melting. Law.


1. Spray pyrolysis

Spray pyrolysis uses Al(SO4)3, Al[NO3]3 and AlCl3 to make spherical droplets via atomization. Then, spherical powders of alumina are formed through high-temperaturepyrolysis. This method is very energy-intensive and requires temperatures of 900°C.


2. Spray drying

Spray drying is a method that reacts aluminum salt solution and ammonia water to create alumina sol. Next, spray-drying at 150-240 degrees C to prepare spherical amounts of alumina.

This method has the advantage over spray pyrolysis in terms of energy consumption.


3. Jet melting method

Plasma flame is used to melt aluminum powder or aluminum oxide directly. Then, the plasma flame is used to anneal the powder. Adjusting the DC arc’s power and composition can control the level of spheroidization. This will allow you to create a hollow structure.


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Preparation of Al – Mg – B Ceramic Materials

Technical Background Ceramic materials made from aluminum-mgb are known for their high hardness, good resistance to abrasion and chemical stability. These characteristics make them a popular choice in both military and high-tech equipment. The limited application of aluminum-MgB ceramic materials is due to their weak toughness. There are currently several preparation methods for aluminum magnesium-boron ceramics. These include heat treatment, hot pressing sintering and mechanical alloying. High energy consumption is a result of mechanical alloying hot press sintering. Iron pollution can be caused by ball grinding and quenching steel. The process can also cause iron contamination. High energy and cost are the main drawbacks of heat treatment. It is also easy to introduce impurities. Crystal evolution deposition and metal salt preparation methods are high-purity and can eliminate the formation of phase due to heat treatment. But they also have high energy costs, long cycles, and high prices. These methods may also be used to prepare aluminum magnesium boren ceramics. But there are technical drawbacks and shortcomings.

The preparation method

Aluminum powder, magnesium powder, boron and powdered raw materials are used to prepare boron. Rmcplant (aka. Advanced material by Rmcplant . Global chemical supplier and manufacturer, Rmcplant has over 12 years of experience in manufacturing super-high quality chemicals. High purity, small particles size, and low impurity are the hallmarks of the Aluminum Magnesium BoridePowder that our company produces. We can help you if the price is lower.
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