Tungsten Oxide

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【Know Tungsten】What Is Tungsten Boride? 76

??????? The compound formed by boron and an element with a smaller electronegativity than it is called a boride. Borides are generally very hard, chemically inert, and often have special physical and chemical properties. They are very important modern new non-metallic materials. Tungsten boride is usually made by directly sintering tungsten powder and boron. All tungsten boride materials are hard and brittle and have conductive properties. The main uses of tungsten boride are: Pharmaceutical intermediates Military hard metals Superhard material…

Tungsten Oxide
【Know Tungsten】Tungsten Hexachloride 378

?????? Tungsten hexachloride is a compound of tungsten and chlorine. Under standard conditions, this dark purple-blue substance exists as a volatile solid. Tungsten Hexachloride Uses. Catalyst for synthesizing engineering plastics PDCPD. Refining high purity tungsten and preparing WC. Driving precursor of nanometer tungsten. Safety Precautions: Tungsten hexachloride is a corrosive oxidizing agent and will hydrolyze to release hydrogen chloride.

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【Know Tungsten】Orange Tungsten Oxide 308

????? Orange tungsten oxide is a compound usually referred to as a non-stoichiometric oxidation state of tungsten oxide with the chemical formula WO3. However, it is orange in color. This orange color originates from defects or impurities in the crystal structure of tungsten oxide, or from the presence of low valence tungsten ions due to partial reduction. Tungsten oxide is usually yellow or green, but under certain conditions (e.g. heat treatment or partial reduction) it can take on an orange,…

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Single-crystal Ammonium Paratungstate 5,068

Single-crystal ammonium paratungstate has properties of good fluidity, high bulk density, small and uniform grain gaps in the blank, few mechanical defects and high compaction density. It also has excellent physical properties such as good compression resistance, tensile resistance, impact resistance, shear resistance and fracture strength. Therefore, single-crystal ammonium paratungstate is an ideal raw material for the production of high-performance tungsten materials such as tungsten powder, tungsten wire, tungsten carbide microdrill, tungsten carbide tool, and tungsten alloy ammunition. More details,…

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Spherical Ultrafine Ammonium Paratungstate 2,142

Spherical ultrafine ammonium paratungstate, or spherical single crystal ultrafine ammonium paratungstate (APT), is the key powder material for fabricating high-density alloys with high performance. More specifically, the spherical ultrafine APT is calcined to obtain tungsten oxide, and spherical tungsten powder is prepared after hydrogen reduction of tungsten oxide. The prepared spherical W powder has the advantages of high bulk density, good fluidity and easy filling of film cavity. Also, it makes the compact have uniform density. So it can be…

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Coarse Crystalized Ammonium Paratungstate 2,275

Coarse crystalized ammonium paratungstate (APT) is a flaky or needle-like white crystal that is slightly soluble in water and insoluble in alcohol. As a raw material for the powder metallurgy industry, coarse crystalized APT has the characteristics of simple production process, high purity, high bulk density, good fluidity, and easy storage and transportation. More details, please visit: http://ammonium-paratungstate.com/index.html The particle size of ammonium paratungstate crystals has a great influence on the particle size of subsequent tungsten powders. It has been…

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Ammonium Paratungstate Tetrahydrate 2,631

Ammonium paratungstate tetrahydrate, or APT·4H2O, is an important intermediate product in the production of tungsten powder. It has been reported that it is a key process to crystallize APT·4H2O from an aqueous solution of ammonium tungstate in the current preparation method of tungsten powder. More details, please visit: http://ammonium-paratungstate.com/index.html According to the literatures, ammonium paratungstate tetrahydrate is an intermediate for the production of metal tungsten, tungsten-containing catalysts or hard materials based on tungsten (such as tungsten carbide) or sputtering targets.…

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Ultrafine Ammonium Paratungstate 404

Ultrafine ammonium paratungstate is an important raw material for the production of nano tungsten powder. Since the 1990s, nano tungsten powder has been generally concerned by researchers all over the world, and ultrafine APT, as an important raw material for preparation of W powder, is also receiving much attention. More details, please visit: http://ammonium-paratungstate.com/index.html However, the particle size of common ammonium paratungstate is 25-45 μm, which is difficult to meet the requirements of producing nano tungsten powder, so the preparation…

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98% Sodium Tungstate Dihydrate 1,034

98% sodium tungstate dihydrate may be studied by TG-DTG technology to know its dehydration process. And the non-isothermal kinetic data of the dehydration process is analyzed using the thermal analysis kinetic data processing method proposed by Malek et al. Processing Methods of Kinetic Data Malek et al. proposed a relatively complete set of kinetic data processing methods. The steps are as follows: 1. Activation energy E was calculated using Ozawa method and Kissiger method among the multiple scanning rate method.…

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Industrial Grade Sodium Tungstate Dihydrate 1,097

Industrial grade sodium tungstate dihydrate is also known as technical grade sodium tungstate dihydrate with molecular formula of Na2WO4?2H2O. The thermal decomposition of Na2WO4?2H2O and its kinetics was studied in a static air by TG-DTG. The thermal decomposition process of the Na2WO4?2H2O occurred in one stage. By the kinetic method of processing thermal analysis data put forward by Malek et al, it is defined that the kinetics model for the dehydration process in SB (m, n). The activation energy E…

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