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Tungsten Alloy PET Shield 216

Tungsten alloy PET shield has good radiation absorption ability for radiation. It is widely used in the medical field, including tungsten alloy PET drug extraction protection parts, tungsten alloy PET drug extraction protection parts, 30ml tungsten alloy PET protective cans, 3/5cc tungsten alloy PET Protective parts, tungsten alloy PET protective bricks and so on. Tungsten alloy PET drug extraction protection can provide medical personnel with the best radiation protection when carrying out radioactive PET drug extraction without using an expensive…

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Tungsten Stopper 238

Tungsten stopper has excellent radiation shielding and performance properties. It is widely used in PET chambers, linear accelerators, HDR rooms, gamma knives and nuclear power plants. Characteristic Tungsten stopper has strong radiation shielding, higher density, good corrosion resistance and mechanical processing performance. It is non-toxic and environmentally friendly. Compared to the same volume of shields, tungsten stopper has better radiation shielding than lead. Applications Tungsten stopper can be used as radioactive source shielding containers, gamma ray shielding shields, shield blocks,…

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Tungsten Alloy Generator Shield 333

Tungsten alloy generator shield contains radioactive nucleus and has incomparable shielding performance of other material radiation source shield. It is widely used in the medical field, which helps medical diagnosis more efficient and safe. Characteristic Tungsten alloy generator shield is higher than lead generator shield. It has high density and strength, good mechanical and corrosion resistance, strong radiation absorption ability and other excellent characteristics. Applications Medi-Ray TM is widely used in the medical field. It can be fitted with tungsten…

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Hollow Ammonium Metatungstate Sphere 547

Hollow ammonium metatungstate sphere may be prepared by spray drying method. The average diameter of the hollow ammonium metatungstate ball is 1.03μm, and the wall thickness is about 100nm. The preparation process is divided into 3 stages: atomization, shell formation during flash evaporation and hollow structure formation. The initial temperature in hot air drying tower is 130°C, which is far higher than the boiling point of water, leading to rapid evaporation of droplet surface water. The fast evaporation speed leads…

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High-purity Ammonium Metatungstate 552

High-purity ammonium metatungstate may be prepared by a coupling process of neutralization-nanofiltration-crystallization. AMT solution is obtained by neutralization-nanofiltration, which can not only reduce cost as high concentration of AMT solution is obtained for the subsequent crystallization process, but also ensure to prepare high purity AMT as the impurity content is low. In the above figure, 1. High pressure pump; 2. Primary liquid tank; 3. Nanofiltration membrane device; 4. Valve; 5. Valve. The neutralization-nanofiltration-crystallization process consists of the following three steps:…

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Ammonium Metatungstate Microsphere 584

Ammonium metatungstate microsphere may be prepared by two different spray drying methods. Ammonium metatungstate (AMT) is usually used as one of the precursors of tungsten carbide (WC) catalysts. And the morphology and particle size distribution of WC microsphere are affected by the properties of precursor. In other words, AMT properties will have an important influence on morphology and particle size distribution of WC microsphere and have a finally effect on the catalytic activity of WC catalyst. Therefore, it is necessary…

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Ammonium Metatungstate Solution 363

Ammonium metatungstate solution is an aqueous solution of ammonium metatungstate (AMT), which may be prepared using ammonium tungstate solution as raw material by Bipolar Membrane Electrodialysis (BMED). AMT solution may be used as raw material for producing its downstream products by liquid phase process. AMT is extremely easily soluble in water, and its solubility in water increases with the increase of temperature. BMED is a new membrane separation technology, which has been widely applied in the preparation of acid, alkali,…

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Chromium Doped Ammonium Paratungstate 578

Chromium doped ammonium paratungstate may be produced by doping chromium (Cr) in evaporation crystallization process during the production of ammonium paratungstate. Adopting chromium acetate (CH3COO)3Cr (analytical reagent) and ammonium tungstate solution obtained by dissolving high-purity WO3 with ammonia water as raw materials to study the process of preparing APT powder by adding chromium acetate during crystallization. The result showed that: 1. Chromium mainly precipitated in the precipitation form of Cr(OH)3, which is prior to ammonium paratungstate, and the pH value…

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Arsenic Doped Ammonium Paratungstate 606

Arsenic doped ammonium paratungstate may be prepared by adopting simple arsenic, nitric acid solution and ammonium paratungstate (APT) as raw materials and forming in liquid phase, the preparing steps are as below: 1. Dissolve a certain amount of simple arsenic (As) in the nitric acid solution with a certain concentration until it completely dissolves; 2. Add APT powder into the nitric acid solution of simple arsenic, and control the content of arsenic in a certain value; 3. After completely mixing…

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Sodium Doped Ammonium Paratungstate 584

Sodium doped ammonium paratungstate may be used to prepare coarse grain size tungsten trioxide (WO3), and the content of sodium (Na) may affect the particle size of tungsten (W) powder prepared by WO3. APT with high sodium content may be calcined to produce high sodium content of WO3 powder – an upstream raw material for preparing coarse grain size tungsten powder, which is a raw material for tungsten carbide with coarse grain size. And tungsten carbide with coarse grain size…

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