What are the products of high temperature calcined alumina coarse powder?

High-temperature calcined alumina powder is widely used in industries such as electronic equipment, structural ceramics, refractory materials, wear-resistant materials, polishing materials, etc., how is it classified?

According to different physical and chemical indicators, high-temperature calcined alumina powder products are mainly divided into five categories: boron fluorine (BF2:1), boron fluorine (BF5:1), pure fluorine (F), pure boron (B), and non-mineralizing agent according to the mineralizer formula, as well as special alumina such as boron chlorine (BL) and fluorine chlorine (FL); Alumina powder products are divided into 325 mesh, 500 mesh, 600 mesh, 800 mesh powder, fine grain powder.

According to different use needs, five series of products have been formed, such as dry pressing and isostatic pressing process series, hot die casting, grouting molding series, refractory material series, pouring destined series, and alumina structure ceramic granulation powder.

Dry pressing, isostatic pressing process series:

This series of products are refined by advanced formula and strict technology, with reasonable particle size distribution, good particle fluidity, loose intergrain bonding, good grindability, and easy sintering. Its porcelain parts are dense, the surface is smooth, the mechanical strength is high, and the electrical insulation is good, which is an ideal raw material for the manufacture of special ceramics.

Hot die-casting, grouting molding series:

This series of products has a large original grain size, stable performance, good molding performance, small shrinkage of products, and a wide range of use, especially suitable for hot die-casting and grouting molding series, and can be used for various high-temperature resistant porcelain parts (spark plugs, etc.), wear-resistant porcelain parts (mortar pump shaft plug pump lining, impeller, grinding medium ball, etc.), electronic substrates, electronic vacuum tubes, etc.

Refractory series:

The product crystal form is stable, which can improve the refractory degree and mechanical properties of the product, and is suitable for the production of amorphous refractories (various high-alumina castables), shaped refractories (corundum bricks, etc.), furnace materials, etc., to meet customers' requirements for higher temperature, excellent thermal shock stability and processing characteristics, and prolong the service life of refractories.

Pouring destined series:

The product has uniform grains, good filling performance and pouring activity, which can improve the sintering density and high temperature flexural and compressive strength of the castable, and enhance the wear, corrosion and erosion resistance of the castable. It can be used for low cement, ultra-low cement or cement-free castables, shaped refractories and precision polishing.

Alumina ceramic granulation powder:

It is made by scientific research ingredients, automatic grinding, pulping and spray drying. The particle size distribution is uniform, the fluidity is good, and the strength is moderate; The billet body has high strength, excellent demoulding performance and low firing temperature; The surface of the product is smooth and the structure is dense. It can meet the process needs of rapid dry pressing molding of precision ceramics, and is an ideal raw material for the production of electronic ceramics and structural ceramic components.

High-temperature alumina has good hardness, high density, and stable performance, so it is widely used in many industries, especially suitable for ceramics, refractories and other industries, which makes it have different types of division.

Class.

1. High-temperature alumina (A-AI2O3) for ceramic industry

1) Calcined alumina powder Na2O < for ordinary ceramics, there are many manufacturers of this type of product, and the production is easier, and the product is average.

2) For structural ceramics such as spark plugs, this kind of products are generally made of industrial aluminum hydroxide or non-metallurgical grade alumina as raw materials, and the Na20 content in industrial alumina is reduced by adding sodium removal agent, because spark plugs and other structural ceramics have strict requirements for Na20 content and shrinkage, so there are higher requirements for production technology and high-temperature calcination process.

3) For new ceramics such as electronic substrates, this kind of products not only require low sodium and stable shrinkage, but also require small original grain size, good grindability and easy sintering.

Class.

2. Abrasives and abrasives can be divided into two categories

1) Ordinary abrasives, general high-temperature alumina powder can even be worse.

2) High-grade abrasives mainly require high calcination temperature, high product hardness, sufficient cutting force and reasonable particle size distribution. Now there are sand mills and jet mills to produce higher product quality, more stable and better to use.

Class.

3. High-temperature alumina for refractory materials (A-AI203).

1) Ordinary refractories are combined with high-alumina cement combined with A-A1203, such products are generally burned with inverted flame kilns, because of their high-temperature calcination cylinders, flexible production, so there are many manufacturers of such products.

2) A-AI203 for high-grade refractories, with the development of the iron and steel industry, higher and higher requirements have been put forward for refractories, low water absorption and reasonable crystalline phase particle size distribution are the key indicators to improve the quality of high-temperature alumina for refractories, with the development of A-AI203 in recent years, its dosage is also increasing.

Different kinds of high-temperature alumina products have different quality and performance, so they can be applied to different industries, so when choosing, we must also choose the type according to the actual required industry.

White fused alumina powder and alumina powder seem to be the same, but they have different properties and uses, so let's take the time to sort out the differences between them.

1. Alumina powder1. Appearance: white powder, crystalline phase;

2. Average particle size nm, :20 5;

3. Content %: greater than;

4. Melting point: 2010 -2050;

5. Boiling point: 2980;

6. Relative density water = 1, :;

7. Color: white, dark blue after calcination. White fused alumina powder and alumina powder seem to be the same, but they have different properties and uses, so let's take the time to sort out the differences between them.

1. Alumina powder1. Appearance: white powder, crystalline phase;

2. Average particle size nm, :20 5;

3. Content %: greater than;

4. Melting point: 2010 -2050;

5. Boiling point: 2980;

6. Relative density water = 1, :;

7. Color: white, dark blue after calcination.

Please describe the problem in detail.

Summary. Hello, how to reduce the impurity content in calcined alumina and improve its purity? In general, there are several methods, such as through solution refining, controlling the neutralization rate, neutralizing the pH value, filtering the heating medium, and adding complexing agents.

Hello, how to reduce the impurity content in calcined alumina and improve its purity? In general, there are several methods, such as through solution refining, controlling the neutralization rate, neutralizing the pH value, filtering the heating medium, and adding complexing agents.

Related information, 1High-purity raw materials are used to purify high-temperature alumina powder. 2.It is processed by low-iron pollution crushing equipment. 3.Increase smelting capacity. 4.The melting furnace needs to have good heat retention and air permeability. <>

The production process of alumina powder is getting higher and higher, and it can already produce alumina powder below 1 micron. Nano alumina transparent liquid XZ-LY101 body color colorless and transparent. The nano alumina transparent dispersion is used in 5-10 nano alumina, the alumina is the alumina screened out by layers of deep processing of nano alumina, added to various acrylic resins, polyurethane resins, epoxy resins, melamine resins, silicon acrylic emulsions and other resins of water-based liquids, the addition amount is 5% to 10%, can improve the hardness of the resin, the hardness can reach 6-8h, completely transparent, the nano alumina liquid can be water-based or oil-based any solvent, At the same time, it can make all kinds of glass coating materials, gemstones, precision instrument materials, etc.

Dispersant Properties: Appearance: White Powdery Solvent: Water Dissolved Properties: Colorless Transparent Molecule Weight: 10,000 Drying Water Loss: Content Added.

Quantity packing: 20kg plastic bag packing.

Alumina powder appearance: white powdery solvent: water dissolved properties: colorless transparent molecule weight: 10,000 drying water loss: content added.

Quantity packing: 20kg plastic bag packing.

Calcined alumina is calcined at a high temperature of more than 1400, and the gamma crystal form is converted into an alpha crystal form, and the conversion rate of alpha alumina is generally more than 95%, and the higher the alpha conversion rate value, the more complete the calcination and the higher the calcination temperature. The calcined alumina needs to be finely ground to the level of fine powder as a raw material for ceramics or refractories, and the calcined alumina processing methods mainly include the following ways.

1. The most common is the ball mill, the ball mill processing calcined alumina is the most economical and simple way, the operation is simple and flexible, and the production cost is low. However, there is a relatively large difficulty in processing fine products.

2. Mechanical grinding: It is also a more common processing method, mainly producing high-grade ultrafine powder products.

3. Jet mill: It is a very ideal equipment for processing raw materials for fine products. The disadvantages are high energy consumption, low output, high production cost, and high equipment.

Huake Refractory XZ-L690 is used to make cement, porcelain, paint fillers, mordants, metal aluminum, etc. It can be added to various water-based resins, oily resins, epoxy resins, acrylic resins, polyurethane resins, plastics, rubber, with an addition amount of 3%-5%, which can significantly improve the hardness of the material, and the hardness can reach 6-8h or even higher. It can also be used in thermal conductivity, polishing, electroplating, catalysts, etc.

Alumina aqueous system dispersant.

Model: HFXZ-802

Overview: Self-developed and produced dispersant HFXZ-802 for alumina water dispersion, according to customer needs, after a large number of experiments verified, can completely prevent alumina powder sedimentation in the water system composite formula, the dispersant is a composite formula system, powder particle size can be 80 mesh to 1000 mesh.

According to different physical and chemical indicators, high-temperature calcined alumina powder products are mainly divided into boron fluoride (

BF2:1), boron fluorine (BF5:1), pure fluorine (F), pure boron (B), no mineralizing agent, and special alumina such as boron chlorine (BL), fluorochlorine (FL), etc.; Alumina powder products are divided into 325 mesh, 500 mesh, 600 mesh, 800 mesh powder, fine grain powder.

According to different use needs, five series of products have been formed.