A NEW PROCESS FOR PRODUCTION OF TUNGSTEN, TUNGSTEN CARBIDE AND TUNGSTEN OXIDE POWDERS

Fine cemented carbide in the diameter of less than 1 μm is obtained activated tungsten oxide. The samples are characterized by laser particle size analyze, electron microscope and sclerometer. The experimental results show that the size of tungsten particles and tungsten carbide prepared with activated tungsten becomes small remarkably, and coarse tungsten particles decrease. The properties of cemented carbide prepared with activated tungsten oxide are better than those of cemented carbide made with blue tungsten oxide. Especially, the hardness of cemented carbide prepared with activated tungsten oxide increases by about 7 %.

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Investigations of the influence of tungsten carbide and tungsten oxide nanopowders on the radiation protection properties of cement matrix-based composite materials

Journal of Physics Conference Series ◽

10.1088/1742-6596/1652/1/012008 ◽

2020 ◽

Vol 1652 ◽

pp. 012008

Author(s):

V Gavrish ◽

N Cherkashina ◽

T Chayka

Keyword(s):

Composite Materials ◽

Tungsten Carbide ◽

Tungsten Oxide ◽

Radiation Protection ◽

Cement Matrix ◽

And Tungsten

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Specification for rotary drill rods and tungsten carbide tipped rotary drill bits

10.3403/00115410 ◽

1974 ◽

Keyword(s):

Tungsten Carbide ◽

Drill Bits ◽

And Tungsten

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Detailed Assessments of Tribological Properties of Binder Jetting Printed Stainless Steel and Tungsten Carbide Infiltrated with Bronze

Wear ◽

10.1016/j.wear.2021.203788 ◽

2021 ◽

pp. 203788

Author(s):

Shaogang Cui ◽

Shenglu Lu ◽

Kiet Tieu ◽

Ganesh Kumar Meenashisundaram ◽

Long Wang ◽

...

Keyword(s):

Stainless Steel ◽

Tungsten Carbide ◽

Tribological Properties ◽

Binder Jetting ◽

And Tungsten

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Conversion of Methanol on Rutile TiO2 (110) and Tungsten Oxide Clusters: 1. Population of Defect-Dependent Thermal Reaction Pathways

Physical Chemistry Chemical Physics ◽

10.1039/d1cp01175h ◽

2021 ◽

Author(s):

Lars Mohrhusen ◽

Katharina Al-Shamery

Keyword(s):

Tungsten Oxide ◽

Single Crystals ◽

Model System ◽

Thermal Reaction ◽

Reaction Pathways ◽

Bifunctional Catalysts ◽

Rutile Tio2 ◽

Reaction Routes ◽

And Tungsten

Tungsten oxide clusters deposited on rutile TiO2 (110) single crystals were used as a model system for heterogenous oxide-oxide bifunctional catalysts. The population of different thermal reaction routes in methanol...

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ZnWO4 Nanoparticle Scintillators for High Resolution X-ray Imaging

Nanomaterials ◽

10.3390/nano10091721 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1721

Author(s):

Heon Yong Jeong ◽

Hyung San Lim ◽

Ju Hyuk Lee ◽

Jun Heo ◽

Hyun Nam Kim ◽

...

Keyword(s):

Particle Size ◽

Zinc Oxide ◽

High Resolution ◽

Tungsten Oxide ◽

Spatial Resolution ◽

High Spatial Resolution ◽

X Ray ◽

X Ray Imaging ◽

Average Size ◽

And Tungsten

The effect of scintillator particle size on high-resolution X-ray imaging was studied using zinc tungstate (ZnWO4) particles. The ZnWO4 particles were fabricated through a solid-state reaction between zinc oxide and tungsten oxide at various temperatures, producing particles with average sizes of 176.4 nm, 626.7 nm, and 2.127 μm; the zinc oxide and tungsten oxide were created using anodization. The spatial resolutions of high-resolution X-ray images, obtained from utilizing the fabricated particles, were determined: particles with the average size of 176.4 nm produced the highest spatial resolution. The results demonstrate that high spatial resolution can be obtained from ZnWO4 nanoparticle scintillators that minimize optical diffusion by having a particle size that is smaller than the emission wavelength.

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