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Preparation method of tungsten oxide

Russia's insistence on paying for Russian gas in rubles has rattled European countries: Greece held an emergency meeting of suppliers, the Dutch government would urge consumers to use less gas, and the French energy regulator told consumers not to panic. Russian gas meets one-third of Europe's annual energy needs.

Russia said they could expand their demand for ruble payments for other commodities, including oil, grain, fertilizer, coal, and metals, which raised the risk of recession in Europe and the US. 

Moscow is expected to unveil its ruble payment plan in early April, but it said it would not immediately ask buyers to pay for gas in rubles.  

Western countries have said paying in rubles would be a breach of contract, and renegotiation could take months or longer. This uncertainty has pushed commodity market prices higher.

The supply and prices of other commodities like the tungsten oxide, tungsten oxide overview, tungsten oxide application, tungsten oxide supplier, tungsten oxide price could also be affected.

Tungsten oxide overview

Tungsten trioxide is a powder metallurgy 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, namely tungsten trioxide (referred to as yellow tungsten), molecular formula is WO3, and blue tungsten oxide (referred to as blue tungsten, is a mixed tungsten oxide), molecular formula W20O58. Yellow tungsten is light yellow crystalline powder, blue tungsten is dark blue or blue-black crystalline powder.

Preparation method of tungsten oxide

1. Ammonium tungstate method: The tungsten concentrate is hydrolyzed by sodium hydroxide, neutralized with hydrochloric acid, and then reacted with ammonium chloride to generate ammonium tungstate, which is then added with hydrochloric acid for acid hydrolysis to generate tungstic acid, which is then decomposed by roasting. , pulverized to obtain tungsten trioxide.

2. Hydrochloric acid decomposition method of tungstate. The saturated aqueous solution of sodium tungstate Na2WO4, calcium tungstate CaWO4 and other tungstate salts is heated, and the solution is slowly added dropwise into 2-3 times excess boiling concentrated hydrochloric acid by molar ratio. According to the above reaction, yellow tungstic acid is precipitated. At this time, if the dripping speed is too fast or the liquid temperature drops, suspension or colloidal precipitation is likely to be formed, which brings difficulties to the next treatment. After the dropwise addition, heating was continued on a water bath for 1 h, and the precipitate became easy to filter. After standing, it was washed several times with 5% ammonium nitrate aqueous solution to completely remove Cl-. After filtration, it is dried at 120 °C, and finally heated to 600 °C, the tungstic acid is completely dehydrated and becomes tungsten trioxide.

3. Thermal decomposition of ammonium paratungstate. Put ammonium paratungstate (NH4) 10W12O41·11H2O purified by recrystallization method into a porcelain crucible, and when heated to above about 400 ℃, ammonia volatilizes to obtain tungsten trioxide.

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Application of tungsten oxide WO3 powder

Tungsten oxide has a variety of uses in daily life. It is commonly used in the manufacture of phosphors for industrial X-ray screens and tungstates for fire-resistant fabrics. Due to its rich yellow element, tungsten oxide is also used as a pigment in ceramics and paints. In addition, other application examples of tungsten trioxide are as follows:

Tungsten oxide is mainly used in the production of tungsten powder and tungsten carbide powder by calcination reduction, and is further used in the production of cemented carbide products, such as the manufacture of tools and molds.

Tungsten oxide can also be used to manufacture pure tungsten products, tungsten rods, tungsten wires, tungsten electrodes; and use counterweights and radiation shielding materials.

In industrial production, a small amount is also used as a colorant for yellow ceramics. In the shipbuilding industry, tungsten oxide is used as an important anti-corrosion paint and coating material.

Tungsten oxide has been used to produce electrochromic windows, smart windows. These windows are electrically switchable glass that varies in light transmittance and applied voltage. This allows users to tint their windows by changing the heat or light.

Tungsten oxide WO3 powder price

The price of tungsten trioxide powder will change randomly with the production cost of tungsten trioxide powder, transportation cost, international situation, exchange rate, market supply and demand and other factors. Tanki New Materials Co.,Ltd aims to help various industries and chemical wholesalers find high-quality, inexpensive nanomaterials and chemicals by providing turnkey custom manufacturing services. If you are looking for tungsten oxide WO3 powder, please feel free to send an inquiry to get the latest price of tungsten oxide WO3 powder.

Tungsten Oxide WO3 Powder Supplier

As a global tungsten oxide WO3 powder supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, structural devices, and can provide OEM services.

More information about Tungsten Oxide WO3 Powder

Tungsten Trioxide Properties (Theoretical)

Compound Formula

WO3

Molecular Weight

231.85

Appearance

Yellow Powder

Melting Point

1473 °C (2683 °F)

Boiling Point

1700 °C ( 3092 °F)

Density

7.16 g/cm3

Solubility in H2O

Insoluble

Crystal Phase / Structure

Monoclinic

Exact Mass

231.936 g/mol

Monoisotopic Mass

231.935644 Da

Charge

-6


The United States urges the U.N. Security Council to impose additional sanctions on North Korea in response to its latest ballistic missile launch, including a ban on tobacco and oil exports to North Korea and a blacklist of the Lazarus hacking group.  

The United States circulated the draft to the 15 members of the Security Council this week. It was not immediately clear if or when a vote would take place. A resolution requires nine "yes" votes and no vetoes from Russia, China, France, Britain, or the United States.  

Russia and China have already voiced opposition to tightening sanctions in response to Pyongyang's launch of an intercontinental ballistic missile last month -- the first since 2017.  

U.S. and South Korean officials and analysts also say there are growing indications that North Korea may soon conduct its first nuclear weapons test since 2017, too.  

The U.S. -drafted U.N. resolution would expand the ban on ballistic missile launches to include cruise missiles or "any other delivery system capable of delivering a nuclear weapon."  

The deal would halve crude oil exports to North Korea to 2 million barrels a year and refined oil exports to 250,000 barrels a year. The resolution also seeks to ban North Korea's export of "fossil fuels, mineral oils, and their distilled tungsten oxide, tungsten oxide overview, tungsten oxide application, tungsten oxide supplier, tungsten oxide price are estimated to be influenced by international political situation changes.

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