Ammonium metatungstate, abbreviated as AMT, a white slightly yellowish crystalline powder with good water solubility. As a key intermediate compound in tungsten wet smelting process, ammonium metatungstate plays a crucial role in the preparation of tungsten-based chemical products and metal products. With its wide range of applications across various industries, including petroleum, chemicals, metallurgy, electronics, optics, and ceramics, etc., ammonium metatungstate has become an indispensable and important raw material in modern industry.

In the first half of February 2024, Jiangxi Tungsten Holding Group Company Limited (Jiangxi Tungsten) quoted 123,500 yuan/standard ton for high-grade wolframite concentrate, an increase of 1000 yuan/standard ton compared to the second half of January 2024.

The forecasted average prices for tungsten products in February 2024, as disclosed by Ganzhou Tungsten Industry Association (GZTIA), are as follows: 55% wolframite concentrate priced at 122,000 yuan/standard ton, representing a 2,000 yuan/standard ton increase compared to January 2024; ammonium paratungstate (APT) priced at 182,000 yuan/ton, representing a 1,500 yuan/ton increase compared to January 2024; and medium-grain tungsten powder priced at 276 yuan/kg, representing a 2 yuan/kg increase compared to January 2024.

Nano tungsten trioxide has a large specific surface area and significant surface effect.

As a cathode material, nanometer tungsten trioxide has a high theoretical capacity (693mAhg-1). Compared with cobalt, it is low-cost and environmentally friendly. Its use in the production of lithium-ion battery cathode materials has achieved industrial mass production and has gradually replaced Cobalt becomes the main raw material for lithium-ion batteries, which will significantly reduce the cost of electric vehicles.

The particle size of nano-tungsten trioxide produced by Chinatungsten Online is 50nm, with high purity and stable quality.

If you need customization, please contact sales@chinatungsten.com or call 86 592-5129696.

The tensile strength of tungsten alloy swaging rod is much higher than that of tungsten alloy rods. The tensile strength of tungsten alloy rod is 1050MPa. After tungsten alloy rods are forged, their tensile strength can reach 1200MPa.

Tungsten alloy swaging rod characteristics:

1. high density

2.High melting point

3. small volume

4.High hardness

5.High wear resistance

6. High tensile strength

7.High elongation

8.High temperature resistance

9. Low steam pressure

The uses of tungsten alloy swaging rods include: kinetic energy armor-piercing projectile warheads, rifle bullets, anti-material sniper rifle bullets, etc.

If you need customization, please contact sales@chinatungsten.com or call 0592-5129696.

Tungsten carbide nozzle for 3D printer uses international grade K20. Compared with traditional brass nozzle, tungsten carbide nozzle has the below advantages:

1.Super Wear-Resistance

2.High Temperature Performance

3.Low Pushing Force

4.Faster Extrusion Speed

5.Tight Hole Tolerance (±0.05mm)

6.Longer service life

Regular diameter of nozzle: 0.4mm, 0.6mm, 0.8mm

Chinatungsten can customize with drawings!

If you need customization, please contact sales@chinatungsten.com or call 0592-5129696.

Tungstic acid is yellow and shiny flaky crystal or crystalline powder, soluble in water, insoluble in ethanol, and slightly soluble in ammonia. Weathering in the air. When heated to 100°C, it loses crystal water and becomes anhydrous. It reacts with strong acids (except hydrofluoric acid) to form water-insoluble yellow tungstic acid. It reacts with phosphoric acid or phosphate to form phosphotungstic heteropoly acid complex. It reacts with organic acids such as tartaric acid, citric acid, and oxalic acid to form corresponding organic acid complexes. compound.

Preparation

Tungsten trioxide reacts with sodium hydroxide, or tungsten concentrate and sodium hydroxide are pressure-cooked to generate a tungstic acid solution. After refining, filtration, ion exchange and other processes, the impurities are separated, and then evaporated and crystallized to obtain a tungstic acid product.

The uses of tungstic acid include the following aspects:

1. Tungstic acid is an important chemical raw material that can be used to manufacture metal tungsten, tungsten wire, tungstate, etc.

2. Due to the rich color of tungstic acid, it can be used as mordant, pigment, dye and ink.

3. Tungstic acid is used as a fabric weighting agent or fabric auxiliary in the textile industry. A mixture of tungstic acid, ammonium sulfate, ammonium phosphate, etc. can be used to make fibers fireproof and waterproof. This fiber can be used to make fireproof rayon and rayon. Can also be used for leather tanning.

4. Used for electroplating coating anti-corrosion.

5. Used as a co-solvent to introduce enamel color materials, which can reduce the firing temperature and complement the color.

6. Used in the petroleum industry and the manufacturing of aviation and aerospace materials.

Violet tungsten oxide, named for its violet appearance, is a violet or blue-violet fine crystal-like powder.

Violet tungsten oxide is usually produced by controlling certain reduction conditions using ammonium paratungstate, tungstic acid or tungsten trioxide as raw materials. The preparation methods of violet tungsten usually include APT wet hydrogen direct reduction method, hydrogen tungstate reduction method, APT mild reduction method, etc.

Due to the special needle-like or fine columnar crystal structure of violet tungsten oxide, and its more abundant cracks than other tungsten oxide particles (all tungsten oxide particles have abundant cracks inside), this structure has large gaps, making Its bulk density is low, which is beneficial to reduction or other reactions. The uses of violet tungsten oxide are as follows:

1. Preparation of tungsten powder, especially the preparation of nanometer, submicron or ultra-fine tungsten powder;

2. Used in gas sensors, showing good gas sensitivity to nitrogen dioxide (NO2) at room temperature;

3. Preparation of tungsten carbide powder and ultrafine WC-Co powder.

4. Raw materials for the production of glass thermal insulation coating dispersions.

5. Additives for lithium battery cathode materials.

Blue tungsten oxide is the product of the interaction between reducing agent and tungsten compound, usually called blue tungsten. The composition of blue tungsten is very complex, and there are also intermediate oxides such as WO2 and W4. If the composition of blue tungsten is calculated as WO, the tungsten content is 82.13%, while the tungsten content in WO is 79.30%. That is to say, the tungsten content in blue tungsten oxide is greater than tungsten trioxide. According to the blue tungsten oxide product standard requirements, its purity is 99.95%, and the tungsten content should reach 80%~80.8%.

The preparation methods of blue tungsten oxide include: APT sealed calcination method, APT hydrogen mild reduction method, intrinsic reduction method, ion exchange method, etc. Among them, the ion exchange method is the most common and economical preparation method.

Blue tungsten oxide can be used to produce tungsten powder, and then produce tungsten products such as cemented carbide, pure tungsten and tungsten alloy products. In recent years, blue tungsten oxide has been used in emerging industries such as lubricants, catalysts, thin film substrates for semiconductor equipment, radiation protection products, electronic components, raw materials for glass thermal insulation coating dispersions, etc.

Ammonium metatungstate is an important intermediate compound in the tungsten wet smelting process. It appears as a white slightly yellow crystalline powder. Soluble in water, at 25℃, the solubility is greater than 300grams in 100ml water.

The main preparation methods are: acid neutralization method, thermal separation method, electrodialysis method, ion exchange method, solvent extraction method and preparation method using ammonium paratungstate as raw material. Among them, the acid neutralization method is the main process, which can use organic acids (formic acid, acetic acid, citric acid, lactic acid, etc.) or inorganic acids (tungstic acid, nitric acid, etc.). Organic acids are mild in acidity and easy to operate, but they are more expensive and affecting costs is a major drawback. Among inorganic acids, nitric acid is easy to obtain and cheap. The nitric acid neutralization method for preparing ammonium metatungstate has simple process and equipment, which has attracted people's attention and has been widely used in industrial production.

The purity of ammonium metatungstate provided by Chinatungsten Online is generally above 90.00% or 91.00%.