Synthesis of tungsten carbide nanoparticles by hydrothermal method and its Characterization

Sagadevan, Suresh; Das, Isha; Singh, Preeti; Podder, Jiban

doi:10.1007/s10854-016-5638-3

Cited by 28 publications

(20 citation statements)

References 25 publications

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“…On the other hand with the increase of the Co amount in the nano-composite, the initially dielectric loss increment with frequency in the lower region afterward it lowers with frequency in the higher region. This behavior might be due to a high and absolute responsibility of the electric dipoles under the effect of the applied electric field frequency [60][61][62]. Although of these factors above, the loss behavior of the dielectric with frequency appears to be so sophisticated and demands further investigations.…”

Section: Dielectric Loss (ε′)mentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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CuO (S1) Single pure component nanoparticles (SPCNPs), Ag/CuO (S2) binary component hybrid nanoparticles (BCHNPS), Co1/Ag/CuO (S3), and Co2/Ag/CuO (S4) ternary component hybrid nanoparticles (TCHNPS) were synthesized via co-precipitation method. Several spectroscopic methods investigated the characterization of the prepared catalysts. Based on Crystal properties, CuO exhibit a monoclinic phase (tenorite); the grain size of the prepared samples was 28.15 nm, 29.42 nm, 27.86 nm, and 26.67 nm for S1, S2, S3, and S4 respectively. The addition of different content from Co as a dopant to silver decorated CuO gives a clear change to a flake shape. The presence of the IR absorption peaks in the region 400-600 cm −1 matched to the distinctive stretching vibrations of Cu-O bonds in the monoclinic phase structure of CuO. Disappearance of the Raman peaks of CuO and appearing of the new characteristic peaks of cobalt oxide confirms the doping process. Using DRS analysis, arrange of the bandgap values were S1 > S2 > S3 > S4. For the synthetic methyl orange and raw industrial dye, the photodegradation parameters were measured. The results show the excellent activity of Co2/Ag/CuO NPS compared with other samples. Electrical studies of the catalysts show a higher value for the dielectric constant in the higher and lower frequency regions for the sample S4. The hopping process of the charge carrier's improving as a result of the increase of applied field frequency which leads to an increase in the material conductivity.

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Section: Dielectric Loss (ε′)mentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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show abstract

“…The polarizability of metal ions lags behind the external electric field at higher frequencies where the dielectric constants attain constant values. The dielectric loss (tan δ) values decrease with increasing frequency and become almost frequency independent at high frequency zones because the motion of domain walls is inhibited and magnetization is forced to change rotation, revealing the application of these materials in high frequency devices [54]. Materials with high dielectric constants along with low dielectric loss have received exceptional recognition in various applications [55,56].…”

Section: Dielectric Studiesmentioning

confidence: 99%

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Badreddine

Srour

Awad

et al. 2020

Mater. Res. Express

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Zn1−xSmxO nanoparticles, with 0.00 ≤ x ≤ 0.10, were prepared using chemical co-precipitation method. The structure and morphology of the obtained samples were characterized using x-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. However, the mechanical properties were investigated via digital Vickers microhardness tester. Vickers microhardness measurements were carried out at different applied loads, varying between 0.5 and 10 N at dwell time 60 s on pressed discs of average thickness 3 mm. Hv decreased as the Sm-content increased up to 0.02 and then it increased for higher concentrations. Whereas, it increased as the applied load increased, revealing that the samples exhibited a reverse indentation size effect (ISE). The microhardness measurements were interpreted using various models such as Meyer’s law, Hays and Kendall (HK) approach, elastic/plastic deformation (EPD), proportional specimen resistance (PSR) and the indentation-induced cracking (IIC). Mechanical parameters such as Young’s modulus (E), yield strength (Y), fracture toughness (K) and brittleness index (B) were calculated as a function of x. The most adequate model for the true microhardness of these samples is IIC. It was found that the addition of Sm content enhanced the mechanical properties of the prepared samples after x = 0.02. Dielectric measurements were used to compute different parameters such as real and imaginary parts of the complex permittivity, dielectric loss (tan δ) and ac conductivity (σ ac).

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“…Another method for WC powder production was given by Sagadevan, S. et al (2017). Tungsten carbide (WC) nanoparticles were obtained by using the hydrothermal method using reagents of AR grade to obtain the precursors (ammonium metatungstate).…”

Section: Tunsten Carbide Powder Productionmentioning

confidence: 99%

“…Tungsten carbide (WC) nanoparticles were obtained by using the hydrothermal method using reagents of AR grade to obtain the precursors (ammonium metatungstate). The WC powder were obtained by heating the tungsten and carbon precursors in a vacuum furnace at 1000 o C for about 1h [23]. Singla [26].…”

Section: Tunsten Carbide Powder Productionmentioning

confidence: 99%

Tribological Study of HVOF Sprayed Tungsten Carbide Coated Stainless Steel

Kumar¹,

Singh²,

Singari³

2020

IJAPIE

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Corrosion and Wear, or a combination of both, are the main causes of degradation of metals used in the various industrial sectors. Degradation of the metals can be slowed down by adding a layer of resistant coating on the metal surface. This coating separates the base metal from a corrosive environment, reduces wear, and improves the appearance of the metal. The workpiece after coating becomes a composite that has properties far better than the substrate alone. There are various coating techniques, HVOF is one of the most important and widely used processes to protect the metals from wear, corrosion by providing hard and dense coatings. WC coating done by the high-velocity oxy-fuel (HVOF) spray method is the widely used method for providing a layer of corrosive resistance to a wide range of materials that are used in many different industries. In this study, Tungsten carbide (WC-12CO) Coating, HVOF Spray method was studied in great detail. Tungsten Carbide coating was done on a SUS400 Stainless steel substrate using HVOF Spray Process. An, Experiment was done to analyze the various effect of different parameters namely, oxygen rate, propane (fuel) rate, powder rate, spray distance on hardness, and surface roughness of a SUS 400 Stainless Steel substrate. Process optimization was done by using Taguchi and ANOVA methods. It was found that achieving maximum hardness was greatly dependent on propane (fuel) rate followed by powder rate, spray distance, and oxygen rate. The hardness decreases with the increasing fuel rate. And, achieving minimum surface roughness was greatly dependent on spray distance followed by oxygen rate, propane (fuel) rate, powder rate. Surface Roughness increases with increasing spray distance.

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Synthesis of tungsten carbide nanoparticles by hydrothermal method and its Characterization

Cited by 28 publications

References 25 publications

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Tribological Study of HVOF Sprayed Tungsten Carbide Coated Stainless Steel

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