Crystalline Ammonium Tungsten Bronze by Thermal Decomposition of Ammonium Paratungstate (APT)

DTG curves of decomposition of APT

The metastable phases of tungsten oxides or oxide bronzes, such as the hexagonal and the pyrochlore-types AxWO3, have caught much attention because of their one- or three-dimensional opened-tunneling structures. They have been used in the fields of electrochromic devices, humidity and gas sensors and secondary battery.

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Preparation of WC Based Cemented Carbide by Using Ammonium Paratungstate as Binder

SEM image of nonmagenetic cemented carbide

Non-magnetic tungsten carbide (WC) is a kind of hard alloy material with no magnetism or weak magnetism.  It has excellent properties of high hardness, high T.R.S. and high corrosion resistance.  Its applications include the production of standard parts, cold heading, cold punch, and cold mold. It can also be used in non-magnetic wear parts.

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N−Doped WO3 Photocatalyst by Thermal Decomposition of Ammonium Paratungstate (APT)

Image of Diffuse reflectance UV–vis absorption spectra

Titanium dioxide (TiO2) might have wider applications in our daily life than you think. It has been applied in daily products, such as paints, toothpaste, food additive, dyes, sun creams, varnishes, textiles, paper and plastics. Another important application of TiO2 is as a semiconductor. It has the function to purify air, water and soil polluted with various hazardous chemicals.

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Production Method of Nanostructured W–Co Powder by Thermal Reduction of Cobalt Doped Ammonium Paratungstate

The XRD spectra of the powders reduced at 650 °C for 30 min

Tungsten carbide-cobalt (WC–Co) is an alloy of hard, ceramic tungsten carbide and the ductile cobalt, often known as cemented carbide. Some of the noteworthy properties of this alloy are strength, hardness, high electrical and thermal conductivity and high malleability and ductility.

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Cobalt Doped Ammonium Paratungstate (APT) Precursor by Thermochemical Decomposition

Image of Cobalt

Tungsten carbide cobalt (WC-CO) is an alloy of a hard ceramic phase, tungsten carbide (WC) and a ductile metallic phase, the cobalt (Co). Significant properties of WC-Co are hardness, strength, high breaking and beating ductility as well as high electrical and thermal conductivity. By varying the cobalt content between 0 and 20 mass per cent, hard metals can cover a hardness range from tempered steel to super-hard alloys. From hard metals, mainly tools are produced for chipping (turning, milling, drilling) or non-chipping shaping (drawing, rolling, spinning), as well as for cutting or breaking of metals, wood, stone, and ores. Applications of WC-Co in life include surgery equipment, nozzles or reinforcements, small balls in ball pens, hard metal driller, and hard metal coated circular saw blades.

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