Microwave Synthesis of Silicon Carbide Nano Powders with Silicon and Carbon

2014 ◽  
Vol 602-603 ◽  
pp. 118-121
Author(s):  
You Jun Lu ◽  
Hong Fang Shen ◽  
Sheng Wei Guo
Keyword(s):  
Silicon Carbide ◽  
Particle Size ◽  
Microwave Heating ◽  
Chemical Reaction ◽  
Crystalline Phase ◽  
Microwave Synthesis ◽  
Time Effects ◽  
Xrd Patterns

Nanosized silicon carbide powders were synthesized from a mixture of silicon and carbon by microwave heating methods. The Result Indicates SiC can be formed at lower temperatures by using the Si-C reaction at 1200°C for 30min. XRD patterns shows that SiC peaks appeared as the only crystalline phase. SEM photo shows the particle size was 100～200 nanometer. At the same time, Effects of chemical reaction of silicon and carbon was researched by mechanical activated microwave synthesis.

Behavior of Microwave Heating of 316 Stainless Steel Green Body

2014 ◽  
Vol 936 ◽  
pp. 1694-1700
Author(s):  
Zhi Wei Li ◽  
Kai Yong Jiang ◽  
Fei Wang ◽  
Ji Liang Zhang
Keyword(s):  
Particle Size ◽  
Stainless Steel ◽  
Microwave Heating ◽  
Powder Particle ◽  
Microwave Power ◽  
Arc Discharge ◽  
Steel Powder ◽  
Powder Particle Size ◽  
Auxiliary Heating ◽  
316 Stainless Steel

This paper mainly introduces the mechanism of microwave heating: electric conduction loss, eddy current loss and arc discharge. The microwave heating behavior of 316 stainless steel powder body which made by gel casting was investigated in the paper. Experiments on different microwave power, powder particle size, and the content of auxiliary heating material showed that the smaller the powder particle size, the larger microwave power and auxiliary heating materials help 316 stainless steel body for sintering.

A Simple Dissolved Metals Mixing Route to Prepare Nanostructured Mg0.8Zn0.2TiO3 Solid Solution

2015 ◽  
Vol 1112 ◽  
pp. 47-52 ◽  
Author(s):  
Frida Ulfah Ermawati ◽  
Suasmoro Suasmoro ◽  
Suminar Pratapa
Keyword(s):  
Solid Solution ◽  
Particle Size ◽  
Rietveld Analysis ◽  
Dissolved Metals ◽  
Intermediate Phases ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Xrd Patterns ◽  
Zn Ions

A study of liquid mixing route to synthesize high purity Mg0.8Zn0.2TiO3 nanopowder, a candidate dielectric ceramics, has been successfully performed. Formation of the phases on the dried powder was studied using TG/DTA, XRD and FT-IR data. Rietveld analysis on the collected XRD patterns confirmed the formation of solid solution in the system. Such solid solution can be obtained from the powder calcined at 500 °C, but calcination at 550 °C gave rise to the most optimum molar purity up to 98.5% without intermediate phases. The role of Zn ions on the formation of solid solution was also discussed. Homogeneity of particle size distribution and nano-crystallinity of the system was verified from the particle size analyzer data, TEM image and the Rietveld analysis output.

Rapid one-step scalable microwave synthesis of Ti3C2Tx MXene

2021 ◽  
Author(s):  
Jing Zhu ◽  
Jingyi Zhang ◽  
Ruiming Lin ◽  
Benwei Fu ◽  
Chengyi Song ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Microwave Synthesis ◽  
State Of The Art ◽  
Synthesis Time ◽  
One Step

We demonstrate a rapid one-step scalable microwave heating-based method to prepare Ti3C2Tx MXenes, which shortens the synthesis time from tens of hours from state-of-the-art approaches to 15 minutes and avoids...

scholarly journals Changes in Structural and Rheological Properties of Guar Gum Particles in Fluidized-Bed Agglomeration: Effect of Sucrose Binder Concentration

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 73
Author(s):  
Donghyeon Lee ◽  
Byoungseung Yoo
Keyword(s):  
Particle Size ◽  
Fluidized Bed ◽  
Guar Gum ◽  
Sucrose Concentration ◽  
Ftir Spectra ◽  
Sem Images ◽  
Low Concentrations ◽  
Binder Concentration ◽  
Bed Agglomeration ◽  
Xrd Patterns

Fluidized-bed agglomeration (FBA) is known to modify the structure and rheology of food powders. In this study, guar gum (GG) powders with various concentrations of sucrose binder (0%, 10%, 20%, or 30%) were subjected to fluidized-bed agglomeration. Subsequently, changes in the characteristics of the GG powders were evaluated by using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), particle size distribution (PSD) analysis, and rheological and dispersibility measurements. SEM images and FTIR spectra revealed surface morphology changes and structural modification, respectively, in the original GG powder after FBA, although the changes observed in FTIR spectra were only slightly dependent on sucrose concentration at low concentrations (0–20%). XRD patterns confirmed that the crystallinity of the GG powder was affected by FBA, but not greatly so by binder concentration. The PSD results showed that the GG particle size was increased by FBA and there was a clear relationship between sucrose concentration (10–30%) and mean particle size. The rheological behavior and dispersibility of GG (properties that are known to be affected by the structure of a powder) were also influenced by sucrose concentration. To sum up, FBA and the concentration of sucrose binder used can serve as factors for modifying GG powder.

scholarly journals Synthesis of Chitosan/Zinc Oxide Nanoparticles Stabilized by Chitosan via Microwave Heating

2019 ◽  
Vol 14 (2) ◽  
pp. 450 ◽  
Author(s):  
Nurul Amira Ahmad Yusof ◽  
Norashikin Mat Zain ◽  
Norlin Pauzi
Keyword(s):  
Zinc Oxide ◽  
Microwave Heating ◽  
Zno Nanoparticles ◽  
Bacterial Infections ◽  
Pathogenic Bacteria ◽  
Antibacterial Properties ◽  
Inhibition Zone ◽  
Mean Value ◽  
Average Crystalline Size ◽  
Xrd Patterns

Nowadays, zinc oxide (ZnO) has attracted attention in research and development because of its remarkable antibacterial properties. Chitosan/ZnO nanoparticles were successfully synthesized via microwave heating. The objectives of this work were to investigate the effect of stabilizer, power heating and time heating on size of chitosan/ZnO nanoparticles and to determine antibacterial activity against pathogenic bacteria, where chitosan was used as a stabilizing agent. Chitosan/ZnO nanoparticles were analyzed  by Fourier Transform Infra Red (FTIR), X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and Zetasizer instrument. The power heating and time heating were varied from 400 to 800 Watt and 4 to 8 minutes, respectively. The presence of chitosan has role on preventing the nanoparticles from agglomeration by producing a milky solution of chitosan/ZnO nanoparticles without any suspensions. The increase of power  and time heating improved the size of nanoparticles. The peak in FTIR spectrum at around 427 cm-1 was confirmed the existence of the ZnO phase. XRD patterns showed that the chitosan/ZnO nanoparticles materials were pure phase with average crystalline size is 130 nm. FESEM revealed that chitosan/ZnO nanoparticles were uniformly distributed with the mean value of size is 70 nm and spherical shaped. Further impact of power and time heating on the size of the chitosan/ZnO nanoparticles can be shown by a nanoparticles size distribution with the average of 30 to 90 nm. The results showed that chitosan/ZnO nanoparticles have displayed an antibacterial inhibition zone against Gram-positive S. aureus and Gram-negative E. coli which 16.0 and 13.3 mm, respectively. Chitosan/ZnO nanoparticles were synthesized in this work presented have potential application to prevent bacterial infections. Copyright © 2019 BCREC Group. All rights reserved 

scholarly journals Effect of Heating Duration on the Synthesis of Silicon Carbide Nanotubes by Microwave Heating of MWCNTs and Silica

2017 ◽  
Vol 46 (7) ◽  
pp. 1069-1074
Author(s):  
Chung Sung Tony Voo ◽  
Chun Hong Voon ◽  
Chang Chuan Lee ◽  
Subash C.B. Gopinath ◽  
Bee Ying Lim ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Microwave Heating ◽  
Silicon Carbide Nanotubes ◽  
Heating Duration

Fabrication of silicon carbide nanoceramics

1996 ◽  
Vol 11 (7) ◽  
pp. 1601-1604 ◽  
Author(s):  
Mamoru Mitomo ◽  
Young-Wook Kim ◽  
Hideki Hirotsuru
Keyword(s):  
Silicon Carbide ◽  
Particle Size ◽  
Deformation Behavior ◽  
Superplastic Deformation ◽  
Average Particle Size ◽  
Liquid Phase Sintering ◽  
Carbide Powder ◽  
Average Particle ◽  
Average Grain Size ◽  
Silicon Carbide Powder

Ultrafine silicon carbide powder with an average particle size of 90 nm was densified by hot-processing with the addition of Al2O3, Y2O3, and CaO at 1750 °C. Silicon carbide nanoceramics with an average grain size of 110 nm were prepared by liquid phase sintering at low temperature. The materials showed superplastic deformation at a strain rate of 5.0 × 10-4/s at 1700 °C, which is the lowest temperature published. The microstructure and deformation behavior of materials from a submicrometer powder were also investigated as a reference.

Effect of particle size on oxidation of silicon carbide powders

2007 ◽  
Vol 33 (2) ◽  
pp. 309-313 ◽  
Author(s):  
Jia Quanli ◽  
Zhang Haijun ◽  
Li Suping ◽  
Jia Xiaolin
Keyword(s):  
Silicon Carbide ◽  
Particle Size ◽  
Effect Of Particle Size
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