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by Pan, F and Zhu, QS and Li, SF and Xiang, MQ and Du, Z
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, ISSN 0263-4368, 04/2018, Volume 72, pp. 315 - 322
In this study, the reduction-carbonization property of WO3 obtained by thermal decomposition of ammonium paratungstate (APT) under N-2 and air atmosphere in a... 
TETRAHYDRATE | Nano-sized WC | Monoclinic WO3 | Thermal decomposition | MATERIALS SCIENCE, MULTIDISCIPLINARY | METALLURGY & METALLURGICAL ENGINEERING | TUNGSTEN CARBIDE POWDERS | AIR | XRD | THERMAL-DECOMPOSITION | ATMOSPHERES | Ammonium paratungstate (APT) | Fluidized bed
Journal Article
International Journal of Refractory Metals and Hard Materials, ISSN 0263-4368, 04/2018, Volume 72, pp. 315 - 322
In this study, the reduction-carbonization property of WO obtained by thermal decomposition of ammonium paratungstate (APT) under N and air atmosphere in a... 
Ammonium paratungstate (APT) | Nano-sized WC | Monoclinic WO3 | Thermal decomposition | Fluidized bed | Monoclinic WO
Journal Article
Thermochimica Acta, ISSN 0040-6031, 08/2016, Volume 637, pp. 38 - 50
The thermal decomposition of ammonium paratungstate tetrahydrate has been studied in oxidising atmosphere at four heating rates employing the analytical... 
Ammonium paratungstate tetrahydrate | Thermochemistry | Kinetics | Tungsten trioxide | VACUUM | CHEMISTRY, ANALYTICAL | VERMICULITE SINGLE-CRYSTALS | APT | CHEMISTRY, PHYSICAL | TG/DTA-MS | AIR | XRD | ISOTHERMAL DEHYDRATION | THERMODYNAMICS | REDUCTION | EGA | TG-FTIR
Journal Article
Inorganica Chimica Acta, ISSN 0020-1693, 04/2016, Volume 444, pp. 29 - 35
Ammonium paratungstate (APT, (NH ) [H W O ]· H O ( = 4, 10)) was prepared with the solid–gas phase heterogeneous reaction between tungsten oxide powder,... 
Tungsten-oxide | Ammonium paratungstate | Nanoparticle | Solid–gas phase | Heterogeneous reaction | TETRAHYDRATE | TG/DTA-MS | XRD | WC | THERMAL-DECOMPOSITION | CHEMISTRY, INORGANIC & NUCLEAR | HEXAGONAL TUNGSTEN-OXIDE | CARBIDE | REDUCTION | Solid-gas phase | TG-FTIR
Journal Article
Environmental science and pollution research international, ISSN 0944-1344, 06/2019, Volume 26, Issue 16, pp. 16105 - 16114
To reduce the environmental pollution caused by ammonium paratungstate (APT) production in the Ganzhou area in China, simulated experiments in laboratory and... 
Arsenic | Sulfides | Kilns | Residues | Ammonium | Clinker | Migration | Pollution control | Leaching | Feeding rates | Mass balance | Flue gas | Cement | Field tests | Hydrometallurgy | Index Medicus
Journal Article
by Li, XB and Gao, CH and Zhou, J and Zhou, QS and Qi, TG and Liu, GH and Peng, ZH
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, ISSN 1003-6326, 07/2018, Volume 28, Issue 7, pp. 1456 - 1464
The effects of temperature, ammonia concentration and ammonium carbonate concentration on the dissolving behavior of ammonium paratungstate were studied in... 
pyrochlore-type tungsten trioxide | APT | KINETICS | METALLURGY & METALLURGICAL ENGINEERING | ammonia | TUNGSTEN-CONTAINING MATERIALS | dissolving behavior | ammonium paratungstate | ammonium carbonate | SCHEELITE CONCENTRATE | SODA
Journal Article
Thermochimica Acta, ISSN 0040-6031, 03/2008, Volume 469, Issue 1-2, pp. 12 - 22
The thermal decomposition of ammonium paratungstate tetrahydrate (APT·4H O), (NH ) [H W O ]·4H O, in air to tungsten trioxide, WO , was investigated under... 
Ammonium paratungstate | Thermal decomposition | Tungsten trioxide | Ammonium metatungstate | OXIDATION | CHEMISTRY, ANALYTICAL | METHANOL | thermal decomposition | APT | CRYSTAL-STRUCTURE | CHEMISTRY, PHYSICAL | TG/DTA-MS | XRD | CATALYST | ammonium paratungstate | ammonium metatungstate | REDUCTION | tungsten trioxide | TG-FTIR
Journal Article
Transactions of Nonferrous Metals Society of China, ISSN 1003-6326, 07/2018, Volume 28, Issue 7, pp. 1456 - 1464
The effects of temperature, ammonia concentration and ammonium carbonate concentration on the dissolving behavior of ammonium paratungstate were studied in (NH... 
ammonia | dissolving behavior | pyrochlore-type tungsten trioxide | ammonium paratungstate | ammonium carbonate
Journal Article
International Journal of Refractory Metals and Hard Materials, ISSN 0263-4368, 2012, Volume 30, Issue 1, pp. 177 - 179
Journal Article
Thermochimica Acta, ISSN 0040-6031, 06/2016, Volume 633, pp. 77 - 81
The interaction of ammonia, liberated during thermal decomposition of ammonium paratungstate tetrahydrate in oxidising atmosphere, with tungsten has been... 
Polyoxometalates | Thermochemistry | Photoelectron spectroscopy | Tungsten | CHEMISTRY, ANALYTICAL | THERMODYNAMICS | CHEMISTRY, PHYSICAL | DIFFRACTION | AIR | OXIDES | Ammonia | Oxides
Journal Article
Inorganica Chimica Acta, ISSN 0020-1693, 2016, Volume 444, pp. 29 - 35
The solid-gas phase heterogeneous reaction between tungsten oxide powder, ammonia and water vapors was studied with the aim of preparing ammonium paratungstate... 
Tungsten-oxide | Ammonium paratungstate | Nanoparticle | Heterogeneous reaction | Solid-gas phase
Journal Article
International Journal of Refractory Metals and Hard Materials, ISSN 0263-4368, 03/2014, Volume 43, pp. 13 - 18
W–Al O nanostructured composite has been produced by mechanical milling of ammonium paratungstate (APT) and Al powder mixture at room temperature. The milled... 
X-ray diffraction | Scanning electron microscopy | Mechanical milling | Ammonium paratungstate | ROOM-TEMPERATURE | PARTICLES | MATERIALS SCIENCE, MULTIDISCIPLINARY | METALLURGY & METALLURGICAL ENGINEERING | MECHANOCHEMICAL REDUCTION | THERMAL-DECOMPOSITION | ALUMINUM | WO3 | FABRICATION | NANOCOMPOSITE
Journal Article
Canadian Metallurgical Quarterly, ISSN 0008-4433, 10/2018, Volume 57, Issue 4, pp. 439 - 446
Scheelite could be digested with an aqueous diammonium phosphate and ammonia solution in an autoclave. However, unexpected ammonium paratungstate (APT)... 
ammonia | Scheelite | solubility | ammonium paratungstate | diammonium phosphate | CONCENTRATE | ACID | APT | METALLURGY & METALLURGICAL ENGINEERING | WOLFRAMITE | TUNGSTEN
Journal Article
Materials Science Forum, ISSN 0255-5476, 07/2017, Volume 899, pp. 31 - 35
The carbides of refractory metals like tungsten carbide (WC), tantalum carbide (TaC) and niobium carbide (NbC), has been extensively studied due to their... 
Tungsten carbide | Crystallite size | Rietveld refinement | Methane | Scanning electron microscopy | Refractory metals | Melting | Alloys | Electrical resistance | X-ray diffraction | Hardness | Gas-solid reactions | Niobium | Ammonia | Synthesis | Electrical resistivity | Reaction time | Cemented carbides | Oxidation | Wear resistance | Carburizing
Journal Article
Archives of Metallurgy and Materials, ISSN 1733-3490, 06/2015, Volume 60, Issue 2, pp. 1403 - 1405
Typical oxidation process of tungsten scraps was modified by the rotary kiln with oxygen burner to increase the oxidation rate of tungsten scraps. Also to... 
Tungsten scraps | Extraction | Recycling | Raw material | Ammonium paratungstate | OXIDATION | WC-CO | METALLURGY & METALLURGICAL ENGINEERING | COBALT BINDER
Journal Article
International Journal of Refractory Metals and Hard Materials, ISSN 0263-4368, 03/2013, Volume 37, pp. 106 - 116
In this study, the thermal decomposition of ammonium paratungstate hydrate was investigated in dynamic air and inert gas (nitrogen and argon) atmospheres by... 
Tungsten oxide | Tungsten suboxide | Ammonium paratungstate hydrate | Ammonium tungsten oxide bronze | Thermal analysis | Keywords | TETRAHYDRATE | APT | MATERIALS SCIENCE, MULTIDISCIPLINARY | METALLURGY & METALLURGICAL ENGINEERING | TG/DTA-MS | XRD | REDUCTION | TUNGSTEN BLUE OXIDE | TG-FTIR | Dehydration (Physiology) | Hydrogen | Tungsten compounds | Analysis
Journal Article
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