Effect of ball milling times on phase formation of Mg0.7Zn0.3Fe2O4

Rittidech, A.; Khotsongkram, Panuthat

doi:10.3844/ajassp.2006.1760.1762

Cited by 8 publications

(4 citation statements)

References 3 publications

(4 reference statements)

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“…Figure c,d indicates that the diameters of the ZnO spheres decreased to 150−400 nm after calcination at 500 °C for 2 h. The FESEM images in Figure e,f show more details of the surface morphology for single ZnO spheres corresponding to the sample calcined at 500 °C for 2 h. Figure g−i shows TEM images of the ZnO spheres calcined at 500 °C for 2 h. A single porous ZnO sphere results from the agglomeration of crystalline subcrystals ranging from 20 to 45 nm. It is somewhat different in size compared to the prediction of Scherrer’s equation, because the Scherrer’s equation is based on XRD patterns whereas TEM micrographs are calculated from selected areas in a sample . The diameters of the ZnO spheres decreased after calcination as a result of the removal of soluble starch and the aggregation of the nanoparticles.…”

Section: Resultsmentioning

confidence: 97%

“…It is somewhat different in size compared to the prediction of Scherrer's equation, because the Scherrer's equation is based on XRD patterns whereas TEM micrographs are calculated from selected areas in a sample. 33 The diameters of the ZnO spheres decreased after calcination as a result of the removal of soluble starch and the aggregation of the nanoparticles.…”

Section: Raman Analysismentioning

confidence: 99%

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Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

2011

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Section: Resultsmentioning

confidence: 97%

Section: Raman Analysismentioning

confidence: 99%

Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

2011

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“…because of contamination problems with iron. However, the use of tungsten carbide component and inert atmosphere and /or high vacuum processes has reduced impurity levels to within acceptable limits [37]. Common drawbacks include low surface, highly poly disperse size distribution, and partially amorphous state of the powder.…”

Section: By Using Ss Cylinder Rods Single-phase Amorphous Powder Of A...mentioning

confidence: 99%

A Review on the Synthesis and Characterization of Nanostructurd Metal Oxides

Singh¹,

Yadav²

2022

IJRASET

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Materials reduced to the nanoscale can suddenly show very different properties compared to what they exhibit on a macroscale, enabling unique applications. Nanomaterials can be metals, ceramics, polymeric materials, or composite materials. Their defining characteristic is a very small feature size in the range of 1-100 nanometers (nm). Synthesis Methods play very important role to control the size and surface area of nanomaterials. Inert gas evaporation technique and sputtering technique are most widely used techniques to produce NSMs. In the Chemical Vapour Deposition (CVD) method, the solid is deposited on a heated surface via a chemical reaction from the vapor or gas phase. The chemical process offer over other methods is good chemical homogeneity, as chemical synthesis offers mixing at molecular level. Several synthesis methods are available for the same. Few of them have been described in this article. The understanding of the characterization techniques is equally important. Some of the characterization techniques such as Scaaning Electron Microscope (SEM), X-ray Diffractometer (XRD), Energy dispersive X-ray spectroscopy (EDS, EDX or EDXRF) etc have been discussed in the present article.

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“…HEBM was used to synthesize metal powders mechanically, which led to both amorphous and nanocrystalline intermetallic compounds. Benjamin et al (1970) reported the rst application of HEBM with higher revolutions per minute (r.p.m) to synthesize new oxide dispersion-strengthened alloys [28], which is universally applicable for quick drying or wet grinding of organic and inorganic samples [29,30].…”

Section: Introductionmentioning

confidence: 99%

Effects of Nanometer Particle Size on the Properties of Activated Carbon from Terminalia Catappa Fruits Waste

Purhanudin¹,

Idris

Pallan³

2022

Preprint

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Activated carbon (AC) derived from agricultural by-products, such as Terminalia catappa (TC) fruit waste has been demonstrated as a potential AC material in reducing the production cost in the industry. It also retains the benefits of agricultural by-products, such as being abundant and renewable, environmentally safe, and structurally porous. Several studies have been conducted on the materials’ properties of the prepared ACs from TC fruits at various particle sizes. The top-down approach of high energy ball milling (HEBM) is a simple technique used in reducing the particle size of TC to the nanoscale. Moreover, the ACs have been successfully synthesized by pre-carbonization methods, as well as chemical and physical activations. The pre-carbonization process was performed at 400 oC for 4 hours. The chemical activation was conducted using the KOH impregnation ratio as an activating agent, and a further physical process to activate the carbon was performed in a horizontal tube furnace at 750 oC for two hours with N2 gas flow. The properties and characteristics of Terminalia catappa fruits as ACs were obtained by calculating the percentage yield of ACs and analysis of the surface morphology and elemental composition, particle size, phase analysis, structural analysis, and surface area by using FESEM-EDX, TEM, XRD, Raman spectroscopy, and BET respectively. The percentage yield of ACs was increased with reduced particle size from TC powder, which was in the range of 30–71%. The surface morphology of the prepared ACs reflected the porous structure and the most abundant elements found in the ACs were C, O, and K. The average particle size of all crushed samples obtained was less than 100 nm. The XRD result confirmed the formation of crystalline structures of the graphitic carbon. The results of surface area analysis indicate that the pore size of the activated carbon is mostly in the range of mesopore, whereas the structural analysis depicts that the ratio of ID/IG of AC is nearly the same in between 0.8 to 0.92 and is slightly lower than TC. Thus, the development of agricultural waste-derived mesoporous activated carbon materials is potentially useful for various applications.

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Effect of ball milling times on phase formation of Mg0.7Zn0.3Fe2O4

Cited by 8 publications

References 3 publications

Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

A Review on the Synthesis and Characterization of Nanostructurd Metal Oxides

Effects of Nanometer Particle Size on the Properties of Activated Carbon from Terminalia Catappa Fruits Waste

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