Comparing Thermal and Mechanochemical Decomposition of Ammonium Paratungstate (APT)

APT image

Ammonium paratungstate (APT) is common starting material in the synthesis of tungsten products. Thermal decomposition of ammonium paratungstate (APT) in air leads to production of tungsten trioxide (WO3) which can be used as a catalyst. WO3 is also a common precursor material for manufacture of tungsten metal powder, which has been applied in the fields of lightings, electronics, and high-temperature resistant material.


Impact of Synthesis Conditions on WO3 Powders from Ammonium Paratungstate

SEM image of WO3

Transition element oxides are of great interest for both fundamental science and technological applications due to their multifunctional properties. Tungsten oxides WOx , where 2 ≤ x ≤ 3, are among the most important substances from this large group. Nowadays they are commonly used as photocatalysts, gas sensors, and electrochromic materials. There are also some new applications of WOx for dyesensitized solar cells, optical data storage and field-emission displays. Besides, cation-doped WOx is considered as high-Tc superconductor


Recovery of High-grade Ammonium Paratungstate from Alkaline Leach Liquor

Image of APT

Tungsten products are excellent material having widely applications in different fields such as catalyst, alloys, and hard tools, due to its various characteristics. Ammonium paratungstate (APT) is the precursor material for most tungsten products.


Dissolving Behavior of Ammonium Paratungstate

SEM image of APT

Ammonium paratungstate (APT) is an important intermediate in the process of tungsten metallurgy. With APT, most tungsten products can be produced. The conventional methods for most of the commercial production of APT are caustic soda leaching and soda ash leaching.


Synthesis of Tungsten Oxide Nanobricks Using Ammonium Paratungstate

Image of hydrothermal synthesis

WO3 is a popular and least bothered an n-type semiconductor with promising electrochemical properties, a high surface area, a small pore-size distribution, with several exciting chemical and physical properties, which have made it a appropriate material for various applications such as catalysts, gas sensors, and energy storage applications[5]. Up till, myriads of chemical and physical preparation methods like thermal evaporation, chemical vapor deposition, the sputtering, and colloidal suspension, have been applied for the synthesis of WO3 nanostructures of different phases and morphologies; nanoparticles, nanofiber, nanorods and nanowires. All reported synthesis methods could be either expensive, time consuming or tedious, with huge hazardous waste as toxic byproducts.


Tungsten Granule for Carbon Sulfur Analyzer

tungsten granule image

Tungsten granule is widely used as accelerator and catalyst in carbon sulfur analyzer to test the content of carbon and sulfur.


Tungsten Alloy Shielding

tungsten alloy shielding image

Tungsten alloy shielding is made by tungsten nickel copper alloy or tungsten nickel iron alloy instead of lead or steel, and used to shield the radiations.


Tungsten Alloy Application in Civil Industry

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Tungsten alloy application in civil industry including mechanical industry, instrument industry, electricity industry, metallurgy, oil and chemical industry, sport industry, radiation shielding in medical and nuclear industry.


How to Weld Copper Bonded Tungsten Copper Electrode

pressure weld image

The welding method of copper bonded tungsten copper electrode is silver brazing, which is the most popular method in our workshop. The silver welding material is used, so that the electricity conductivity can be maintained.


W–A12O3 Nanoscale Composite Using Ammonium Paratungstate (APT) And Al Powder Mixture

SEM image of tungsten-Aluminium composite

In recent years, nanometered-scale tungsten and its compounds have attracted much focus because of their superior physical and mechanical properties. A wide variety of methods such as mechanical alloying, combustion synthesis, physical vapor deposition (WD), electric wire explosion etc. have been used to synthesize nanostructured tungsten. Among these techniques, mechanical alloying and mechanochemical synthesis (CS) are very attractive. Simple and inexpensive equipments are required, and it can be conducted at ambient temperature. Indeed MCS uses mechanical energy to active chemical reactions.




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