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Preparation, characteristics and application of silicon powder

Silicon Powder A special trapping device is used to collect and process smoke and dust that are released with waste gases during the smelting of industrial silicon and iron-silicon in an electric industrial furnace. 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 has a high degree of purity, a white color, 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, eliminating internal stress in the cured products and preventing cracking.
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 silicon powder is reasonable. This allows for a reduction in precipitation, delamination, and wear resistance. Improve flame retardant properties.
(5) Silicon powder with silane coupling agent is well suited to various resins. It has good adhesion performance, is easy to blend, and doesn't agglomerate.
(6) Silicon powder The organic resin is filled with this filler, resulting in a product that not only performs better but costs less.
Preparation silicon powder
The preparation of silicon using blocks as the raw material is possible 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 has its advantages and disadvantages.

(aka. Technology Co. Ltd. has over 12 years experience as a supplier & manufacturer of high-quality chemical materials and nanomaterials. The The use of silicon powder Please note that the products produced by our company are of high purity and have low impurity. Please. Contact us if necessary.

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Characteristics and Main Preparation Methods of Spherical Alumina

What is spherical-alumina?

The high-temperature melting spraying method produces spherical alumina. This has the characteristics high sphericity, high content of a phase alumina and high purity. It can be used to fill rubber, plastics, or ceramic raw materials.

Ultrafine spherical aluminum has many excellent characteristics, including high resistance to corrosion and wear resistance, high hardness, high toughness, high strength as well as high resistance against oxidation. It is used widely 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. It is important to explore new methods of producing ultrafine spherical Alumina powder.

Method for preparation of spherical aluminum

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

The spray drying process involves reacting aluminum salt solution and ammonia water to make aluminasol. Next, spray-drying the sol at 150-240°C to produce spherical amounts of alumina.

This method is less energy-intensive than the spray pyrolysis method.


3. Jet melting method

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


Tech Co., Ltd. is a professional spherical supplier of alumina with over 12 years' experience in chemical product development and research. We accept payments via Credit Card and Paypal. We will ship goods overseas via FedEx, DHL and by air or sea to our customers.


Send us an inquiry if you are interested in high quality spherical allumina.

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The Main Preparation Method of Spherical Quartz Powder

What is spherical Quartz Powder?

After being purified from quartz stone, sphere quartz powder is pulverized and ultrafinely pulverized. The powder then goes through a high temperature field so that its phase form, crystal form and shape instantly change, going from solid to molten and then to solid to solid. Amorphous powder is made from irregular angular particles and transformed into regular spherical grains.

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 characteristic of thermal plasma is the fact that the plasma's electron temperature, ion temperature and gas temperature are all almost identical. The thermal plasmas are arc plasma, high frequency and induction plasma.


The high-frequency plasmafusion method 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, so it's a better production method. 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, then collected by gravity and bag dust (nanoscale). In a matter of 1s-2s the spherical and nanoscale SiO2 can be obtained.


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.


Tech Co., Ltd. is a professional spherical powder supplier. It has over 12 years' experience in chemical products development and research. We accept credit cards, T/T and Paypal payments. We will ship goods overseas via FedEx, DHL and by air or sea to our customers.


Send us an inquiry if you're looking for high-quality spherical Quartz powder.

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