Tungsten Oxide

Ammonium metatungstate (AMT) can be used as a thermal insulating material due to its unique thermal properties. When AMT is heated, it decomposes to form tungsten oxide, which has excellent thermal stability and a high melting point. This makes it an ideal material for use in high-temperature applications. AMT can be used as a thermal insulating material in a variety of forms, including coatings, fibers, and composites. For example, AMT can be applied as a coating on the surface of a substrate to provide thermal insulation. It can also be used as a filler material in polymer composites to improve their thermal properties. One advantage of using AMT as a thermal insulating material is its low thermal conductivity. AMT has a thermal conductivity of around 0.06 W/m·K, which is much lower than most metals and other common insulating materials. This means that AMT can provide excellent thermal insulation while also being lightweight and easy to handle. Overall, AMT ca...

Ammonium metatungstate (AMT) is a white crystalline powder that is used as a precursor to make tungsten metal and tungsten alloys, as well as a catalyst and a pigment in various industrial applications. AMT is generally considered to be relatively low in toxicity and not a significant environmental hazard, as long as it is handled and disposed of properly. However, as with any chemical, prolonged or excessive exposure can potentially be harmful. In terms of human health, ingestion or inhalation of AMT can cause irritation of the respiratory tract, eyes, and skin. It may also cause gastrointestinal distress, such as nausea, vomiting, and diarrhea. However, the risk of exposure to AMT is generally considered to be low, as it is not commonly found in consumer products or in the environment. In terms of environmental hazards, AMT is not considered to be toxic to aquatic life, but it may have harmful effects on soil microorganisms and plant growth if it is released...

  Ammonium metatungstate (AMT) is a white crystalline powder that is used in the production of tungsten metal, tungsten carbide, and other tungsten compounds. It is a stable compound under normal conditions, but it can decompose at high temperatures or in contact with strong acids or oxidizing agents. Here are some guidelines for the safe storage and handling of ammonium metatungstate: Storage: AMT should be stored in a cool, dry, well-ventilated area away from incompatible materials such as strong acids, oxidizing agents, and combustible materials. The storage area should be clearly labeled and access should be restricted to authorized personnel only. Handling: When handling AMT, wear appropriate personal protective equipment such as gloves, goggles, and a lab coat. Avoid direct contact with skin, eyes, and clothing. AMT should be handled in a fume hood to prevent inhalation of the powder. Use a dust mask or respirator if necessary. Transportation: AMT...

Ammonium metatungstate (AMT) can be synthesized by reacting sodium tungstate with ammonium chloride in aqueous solution, followed by acidification with hydrochloric acid. The reaction can be summarized by the following equation: Na2WO4 + 2NH4Cl + H2SO4 → (NH4)6H2W12O40·xH2O + 2NaCl + 2H2O In this reaction, sodium tungstate (Na2WO4) and ammonium chloride (NH4Cl) are dissolved in water and then mixed together. Sulfuric acid (H2SO4) is added to acidify the solution, which results in the formation of ammonium metatungstate as a precipitate. The precipitate is then filtered, washed, and dried to obtain the final product. The reaction conditions such as temperature, pH, and reactant concentrations can affect the yield and quality of the final product. The synthesis process can also be modified by using different tungsten sources or different ammonium salts. If you have any inquiry of  tungsten , please feel free to contact us: Email:  sales@chinatungsten.co...

  Basic Trading Condition Product Name Lithium Ion Battery Used Nano Tungstic Acid   Details Purity:99.90% Particle Size: 30~50nm Quantity:1,000.00KG Price:70.00 USD/KG EXW, XIAMEN, CHINA Payment:T/T in advance Delivery Time: in 20 working days Note: Re-check when quantity changed Contact Tel.:+86 592 512 9595  +86 592 512 9696 Fax.:+86 592 512 9797 Email: sales@chinatungsten.com Business WeChat: Disclaimer The above quoted price is for reference only and shall not be used for final order. For detailed inquiry please contact us directly!

  What is Nano Yellow Tungsten Oxide? Yellow tungsten oxide (WO3, Nano Yellow Tungsten Oxide) is an oxide of tungsten with a yellow powder appearance. Two different particles of yellow tungsten oxide are different in size and show different colors. When the crystal size is about 1.5um, it appears yellow; when the crystal size is about 15um, it appears green. Although the appearance is different, the characteristics are similar. Physical Properties Of Nano Yellow Tungsten Oxide: Physical properties: yellow or bright green, finely divided yellow crystal powder, loose specific gravity 2.3~2.8g/cm3. Appearance and characteristics: yellow powder, stable at room temperature, the product passes through 80 mesh screen. Nano Yellow Tungsten Oxide Application: 1. As an important intermediate in tungsten metallurgy industry, yellow tungsten oxide is widely used in metal tungsten powder and tungsten carbide powder, and then used in the production of metal tungsten p...

What Is Purple Tungsten Oxide? Purple tungsten oxide (WO2.72 or W18O49, Purple Tungsten Oxide or Violet Tungsten Oxide, VTO for short) is a kind of tungsten oxide, which is a purple finely divided crystal powder with a molecular weight of 227.36. Physical And Chemical Properties Of Purple Tungsten Oxide: Appearance: purple or blue-purple broken crystal powder Solubility: Insoluble in water, alcohol and most acids, soluble in ammonia and lye. Preparation method of purple tungsten oxide: The preparation of violet tungsten oxide is usually produced by controlling certain reducing conditions using ammonium paratungstate (APT), tungstic acid or tungsten trioxide (WO3) as raw materials. The preparation methods of violet tungsten usually include APT wet hydrogen direct reduction method, hydrogen tungstate reduction method, and APT mild reduction method. Uses of purple tungsten oxide: 1. Preparation of tungsten powder, especially the preparation of nanomet...

  What is Cesium Tungsten Bronze? Cesium tungsten bronze, also known as cesium tungsten oxide, is an inorganic nanomaterial with good near-infrared absorption effect. 780nm) new functional materials with high transmittance. English name: Cesium Tungsten Bronze Molecular formula: Cs0.33WO3 Molecular weight: 276 CAS number: 189619-69-0 Physical and Chemical Properties of Cesium Tungsten Bronze: The molecular structure of cesium tungsten bronze is oxygen octahedral structure, the purity is higher than 99.9%, the bulk density is 1.5g/ml, the particle size is relatively uniform, the primary particle size is about 30nm, the specific surface area is about 50m2/g, and it is not easy to agglomerate, non-toxic , Non-radioactive features. The Production Method of Cesium Tungsten Bronze: Method 1: Preparation of Cs0.33WO3 from Na2WO4•2H2O and Cs2CO3 1. Using sodium tungstate Na2WO4•2H2O as raw material, prepare a sodium tungstate solution with a concentra...