Ammonium Paratungstate (APT) to Synthesis W-A12O3 Nanoscale Composite

SEM image of W-A12O3 Nanoscale Composite

Ammonium paratungstate (APT), as a significant starting material for tungsten, which can be derived into the majority of tungsten products. Wolframite or scheelite (CaWO4) concentrates are the two common materials are APT. There are two important steps in production of metallic tungsten from APT. The first step is thermal reduction of APT powder by heating at 400–900 °C, which leads to ammonia and water elimination as well as the crystallization of tungsten trioxide (W03). In the second step, an even higher temperature is required. WO3 powder was heated under H2 at 600–1100 °C, and metallic tungsten is then prepared.

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Tungsten Alloy Door Applied for X-ray Department

tungsten alloy door applied for X-ray department picture

Tungsten alloy door is a new shielding door for medical applications such as X-ray department. In X-ray department, routine CT examination, MR examination interventional radiation diagnosis and treatment are undergoing. These departments use X-rays and other medical rays to assist diagnosis and treatment. Tungsten alloy protective door having strong absorption and shielding properties to X-rays and other radiation can play a good radiation shielding effect.

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Radiation Protection Tungsten Alloy Plate

radiation protection tungsten alloy plate picture

Radiation protection tungsten alloy plate has strong and stable radiation shielding performance by absorbing X-ray, and γ-ray, etc. It is non-toxic, non-polluting, anti-wear and long-lasting. Also, it has good acid resistance, alkali resistance, and corrosion resistance. Therefore, it is mainly used in X-ray room, CT room of the hospital's radiology department, the dental clinic of the stomatological hospital, and the laboratories of some scientific research units, etc.

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New Medical X-ray Protection Material: W-Ni-Cu Alloy

new medical X-ray protection material: W-Ni-Cu alloy image

As a new medical X-ray protection material, W-Ni-Cu alloy (tungsten-based alloy), is lead-free, environmentally-friendly and non-magnetic, and has high density (~18.8g/cm3), strong ability to absorb high-energy rays. Also, it is machinable and weldable. Besides, it has properties of high hardness, high strength and low coefficient of thermal expansion. Therefore, W-Ni-Cu alloy is widely used in the field of medical radiation shielding sensitive to the magnetic environment.

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Movable Tungsten Alloy Protective Screen

movable tungsten alloy protective screen picture

Movable tungsten alloy protective screen is made of high-performance tungsten alloy material - a new shielding material (traditional shielding material - lead) with excellent radiation shielding performance, so it is often for shielding protection in X-ray imaging rooms, dental clinics, wards and operating rooms, to protect patients from X-rays and other radiation.

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Tungsten Alloy Radiation-proof Foil

tungsten alloy radiation-proof foil picture

Tungsten alloy radiation-proof foil is the first choice for medical radiation shielding as it has strong ability to absorb radiation such as gamma ray and X ray. Compared with foils made of traditional shielding materials such as lead, the shielding performance of tungsten alloy foils is much better than others. Due to its high density, the volume of tungsten alloy foil is 1/3 smaller than lead foil, but shielding function is equivalent.

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Tungsten Alloy Vial Shield

tungsten alloy vial shield image

Tungsten alloy vial shield is made of high quality tungsten alloy with a thickness of 6 mm in every direction (Eq to 10 mm lead at 150 KeV), which is suitable for storage and use of vials containing radiopharmaceuticals. And the vial shield is equipped with a threaded cap for the introduction of the vial, and with a magnetic cap for the access to the vial "cap".

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Medical Radiation-proof Tungsten Alloy Screen

medical radiation-proof tungsten alloy screen picture

Medical radiation-proof tungsten alloy screen is new type of protective screen that has excellent radiation shielding performance (which is better than that of lead screen) and is environmentally friendly, so it is expected to replace the traditional lead screen for use in CT rooms and dental hospitals.

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X-ray Protective Tungsten Alloy Screen

X-ray protective tungsten alloy screen picture

X-ray protective tungsten alloy screen is made of high quality tungsten based alloy with excellent X-ray radiation shielding performance, which is mainly applied for enhancing the protective effect of patients’ radiology diagnosis and treatment. Also, such a screen can be used in industrial radiation protection.

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Carburization of Ammonium Paratungstate (APT) by Methane

Image of tungsten carbie rods

Fabrication of cemented carbides is the main use of tungsten carbide (WC). This application uses powders with a wide range of mean particle size. Submicron grained cemented carbides use very tiny tungsten carbide powders, which is very useful as catalyst. Cemented carbides of submicron carbide grains show an improved toughness to hardness ratio.

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