Preparation of tantalum metal powder by magnesium gas reduction of tantalum pentoxide with different initial particle size

2021 ◽  
pp. 105620
Author(s):  
Seon-Min Hwang ◽  
Su-Jin Park ◽  
Jei-Pil Wang ◽  
Yong-Ho Park ◽  
Dong-Won Lee
Keyword(s):  
Particle Size ◽  
Metal Powder ◽  
Tantalum Pentoxide ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Tantalum Metal

scholarly journals Effect of initial particle size and various composition on the spark plasma sintering of binderless tungsten carbide

2021 ◽  
Vol 1758 (1) ◽  
pp. 012022
Author(s):  
E A Lantsev ◽  
N V Malekhonova ◽  
V N Chuvil`deev ◽  
A V Nokhrin ◽  
M S Boldin ◽  
...  
Keyword(s):  
Particle Size ◽  
Tungsten Carbide ◽  
Spark Plasma Sintering ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Plasma Sintering ◽  
Spark Plasma

Factors Influencing Flocculation and Precipitation. Influence of Initial Particle Size

1941 ◽  
Vol 11 (3) ◽  
pp. 139-153 ◽  
Author(s):  
Ellington M. Beavers ◽  
James E. Magoffin ◽  
Frank K. Cameron
Keyword(s):  
Particle Size ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Factors Influencing

scholarly journals Investigation of hydrate slurry flow behaviors in deep-sea pipes with different inclination angles

2019 ◽  
Vol 74 ◽  
pp. 48 ◽  
Author(s):  
Shupeng Yao ◽  
Yuxing Li ◽  
Wuchang Wang ◽  
Guangchun Song ◽  
Zhengzhuo Shi ◽  
...  
Keyword(s):  
Particle Size ◽  
Flow Rate ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Pipeline Transportation ◽  
Slurry Flow ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Inclination Angles ◽  
Slurry Transport

The marine area is the main direction of the development of oil and gas resources in the world. The pipeline transportation technology of natural gas hydrate slurry plays an important role in the exploitation of marine oil and gas and the exploitation of marine gas hydrate resources. In order to study the influence of pipe inclination on pipeline transportation, population balance model based on hydrate particle aggregation dynamics was coupled with the Eulerian–Eulerian two-fluid multiphase flow model to simulate the flow behaviors of hydrate slurry flow in pipes with different inclination angles. In the study, three variables of inclination, flow rate and initial particle size were considered. The results show that tilted pipes are beneficial to hydrate slurry transport rather than harmful. Meanwhile, higher flow rates and lower initial particle sizes are beneficial for promoting the flow safety of hydrate slurry transport. However, the flow pressure drop of the hydrate slurry increases with the increase of the flow rate and the decrease of the initial particle size, which is not conducive to the economics of mining. The research results in this paper can provide reference for the research of hydrate slurry flow safety and parameter guidance for hydrate solid fluidized mining.

Influences of Initial Particle Size on Preparation of Monodisperse CdS Nanoparticles with Size-Selective Photoetching

1999 ◽  
Vol 28 (5) ◽  
pp. 379-380 ◽  
Author(s):  
Tsukasa Torimoto ◽  
Hironori Kontani ◽  
Takao Sakata ◽  
Hirotaro Mori ◽  
Hiroshi Yoneyama
Keyword(s):  
Particle Size ◽  
Cds Nanoparticles ◽  
Initial Particle ◽  
Initial Particle Size

scholarly journals Effects of Initial Particle Size and Wet and Dry Grinding on Mullite Formation in Sintered Bodies.

1997 ◽  
Vol 30 (5) ◽  
pp. 961-963
Author(s):  
Mitsuru Nikaido ◽  
Shigeru Sano ◽  
Yu-ichi Yoshizawa ◽  
Fumio Saito
Keyword(s):  
Particle Size ◽  
Mullite Formation ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Dry Grinding

scholarly journals INFLUENCE OF PULSED DIVISION OF OXIDE SPHEROIDS IN A PLASMA FLOW UPON THE STRUCTURE OF COATINGS

2018 ◽  
Vol 63 (2) ◽  
pp. 161-168
Author(s):  
N. A. Rudenskaya ◽  
M. V. Rudenskaya
Keyword(s):  
Particle Size ◽  
Wear Resistance ◽  
Plasma Flow ◽  
Granulometric Composition ◽  
Ceramic Coatings ◽  
Structural Transformations ◽  
Plasma Stream ◽  
Initial Particle ◽  
Initial Particle Size ◽  
Structure Of Coatings

The purpose of this part of the research was to study the structural transformations at the transition of particlemicrocomposites from plasma flow into sprayed layer, taking into account grinding of spheroids. The results of investigations of the impulse fission of oxide spheroids in a plasma flow, the granulometric composition of microcomposites of two compositions: SiO2–TiO2, SiO2–TiO2–Al2O3 with an initial particle size of 40–50 μm, 50–63, 63–71 μm and the structure of plasma coatings from them are presented. The process of pulsed fission of spheroids in a plasma stream is found in all the compositions under study and is most intensive in systems of: SiO2–TiO2 (with initial particle size of 40–50 μm and 50–63 μm), SiO2– TiO2–Al2O3 (with initial particle size 40–50 μm). The features of the formation of structural fragments of coatings of various shapes (spheroidized and melted) and composition (completely amorphous, with multilayer shells, including amorphous ones) are studied. It is shown that the proposed technology makes it possible to obtain ceramic coatings with amorphous-crystalline structure, which features are determined by size and composition of initial microcomposites grinding of them directly in the sputtering process allows formation of finer structures in the coatings and, accordingly, significantly changing their performance characteristics and quality (adhesion strength, wear resistance is 3 times higher than that of corundum coatings, porosity is less than 1 %).

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