Reclamation of Abrasive Slurry to Obtain SiC Ceramic Material

2022 ◽  
Vol 905 ◽  
pp. 333-337
Author(s):  
Sheng Fu Yang ◽  
Chun Liang Chen ◽  
Kuang Li Chien ◽  
Chih Chao Liang ◽  
Hsien Ho Chuo
Keyword(s):  
Silicon Carbide ◽  
Chemical Separation ◽  
Distribution Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sic Ceramic ◽  
Illegal Waste Disposal ◽  
Main Component ◽  
The Cost ◽  
Illegal Waste

In the period of silicon and silicon carbide wafer slicing process, the abrasive oil, silicon carbide (SiC), silicon and trace elements e.g., iron, zinc, copper, and nickel is generated as an oily mixture of insoluble matter. The SiC is the main component (>70%) in the abrasive slurry and the extraction of SiC from the slurry can eliminate the risk of illegal waste disposal and reduce the cost for the enterprises. In this study, a chemical separation process is applied to remove silicon particles and SiC can be extracted from the slurry mixtures. The X-ray diffraction analysis revealed that recycled material is moissanite with two crystalline polymorphs. The 3C and 6H X-ray powder pattern is observed and the cubic and hexagonal crystalline structure is revealed. The particle size distribution analysis showed that median value of purified SiC powder material is 9.8 μm.

Develop artificial neural network numerical modeling to study fluid flow and heat transfer of dispersed nanoparticles through base liquid

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tawfeeq Abdullah Alkanhal
Keyword(s):  
Heat Transfer ◽  
Hybrid Nanofluid ◽  
X Ray Diffraction ◽  
Content Type ◽  
X Ray ◽  
Flow And Heat Transfer ◽  
Heat Transfer Capacity ◽  
The Cost ◽  
Heat Transfers ◽  
Base Liquid

Purpose This paper aims to disperse the silicon dioxide in water (as the mono nanofluid [MN]) and then, carbon nanotube (CNT)-silica composite in water (as the hybrid nanofluid [HN]). Design/methodology/approach Nanofluids have gained lots of attention through the recent years. Due to their usage in the industries and also medical applications, they have high protentional to be studied in different aspects. The most common study for the nanofluids is to understand the heat transfer capacity for each material in each fluid. These material(s) or fluid(s) can be one (mono nanofluid) or more than one (hybrid nanofluid). Findings The mixture of two solids is to assess the unique properties of each material and also to decrease the cost of experiments. The heat transfers for both MN and HN were measured at volume fractions up to 1.0%, and temperatures up to 50°C. Also, the heat transfers were compared. By more CNT, thermal conductivity was enhanced about 17.39% (from 12.42% of MN to 29.81% of HN). Originality/value X-Ray diffraction and field emission scanning electron microscope (FESEM) were examined for mono solids and the composite. After the experimental study, for MN and HN, four novel correlations calculated.

Silicon oxycarbide glasses: Part II. Structure and properties

1991 ◽  
Vol 6 (12) ◽  
pp. 2723-2734 ◽  
Author(s):  
Gary M. Renlund ◽  
Svante Prochazka ◽  
Robert H. Doremus
Keyword(s):  
Silicon Carbide ◽  
Coefficient Of Thermal Expansion ◽  
Random Network ◽  
Silicon Oxycarbide ◽  
Index Of Refraction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Silicon Oxycarbide Glasses ◽  
Oxycarbide Glass ◽  
Silicon Oxygen

Silicon oxycarbide glass is formed by the pyrolysis of silicone resins and contains only silicon, oxygen, and carbon. The glass remains amorphous in x-ray diffraction to 1400 °C and shows no features in transmission electron micrographs (TEM) after heating to this temperature. After heating at higher temperature (1500–1650 °C) silicon carbide lines develop in x-ray diffraction, and fine crystalline regions of silicon carbide and graphite are found in TEM and electron diffraction. XPS shows that silicon-oxygen bonds in the glass are similar to those in amorphous and crystalline silicates; some silicons are bonded to both oxygen and carbon. Carbon is bonded to either silicon or carbon; there are no carbon-oxygen bonds in the glass. Infrared spectra are consistent with these conclusions and show silicon-oxygen and silicon-carbon vibrations, but none from carbon-oxygen bonds. 29Si-NMR shows evidence for four different bonding groups around silicon. The silicon oxycarbide structure deduced from these results is a random network of silicon-oxygen tetrahedra, with some silicons bonded to one or two carbons substituted for oxygen; these carbons are in turn tetrahedrally bonded to other silicon atoms. There are very small regions of carbon-carbon bonds only, which are not bonded in the network. This “free” carbon colors the glass black. When the glass is heated above 1400 °C this network composite rearranges in tiny regions to graphite and silicon carbide crystals. The density, coefficient of thermal expansion, hardness, elastic modulus, index of refraction, and viscosity of the silicon oxycarbide glasses are all somewhat higher than these properties in vitreous silica, probably because the silicon-carbide bonds in the network of the oxycarbide lead to a tighter, more closely packed structure. The oxycarbide glass is highly stable to temperatures up to 1600 °C and higher, because oxygen and water diffuse slowly in it.

scholarly journals PHYSICOCHEMICAL STUDY AND QUANTITATIVE ANALYSIS SWARNA MAKSHIKA BHASMA.

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Rajni Bhardwaj ◽  
Smita Johar ◽  
Amit Kapila ◽  
Amandeep Sharma
Keyword(s):  
Particle Size ◽  
Quantitative Analysis ◽  
Iron Oxide ◽  
Major Element ◽  
X Ray Diffraction ◽  
X Ray ◽  
Minor Elements ◽  
Rhombohedral Crystal ◽  
Main Component ◽  
Reddish Brown Color

Swarnamakshika is grouped under Updhatu of Swarna and is composed of Copper, Iron and Sulphur. In this study Swarnamakshika was subjected to Shodhana by Bharjana with Nimbuka swarasa and Shudha Swarnamakshika was given Bhavana with Nimbuka swarasa and subjected to Varahaputa. With ten Varahaputa Bhasma Siddhi Lakshanas were attained swarnamakshika Marana was done by using Nimbuka swarasa until bhasma siddi lakshanas found and it took 10 puta till it attained reddish brown color. The X-ray diffraction analysis showed that d-identified peaks after 10th puta Swarnamakshika bhasma composition is of Iron oxide with rhombohedral crystal system as main component. EDX analysis of Swarna makshika bhasma shows that it contains Iron and Oxygen, as major element and Copper, Sulphur, Carbon, Aluminium, Calcium etc. as minor elements. FESEM study revealed that the particle size of Ashudha and Shudha Swarnamakshika was in the range of 500 nm-3nm. Keywords: Swarnamakshika Bhasma, Nimbuka swarasa, puta

scholarly journals Pengaruh Suhu Sintering Terhadap Sintesis Silicon Carbide (SiC) Berbahan Dasar Abu Sekam Padi dan Grafit Pensil 2B

2015 ◽  
Vol 5 (01) ◽  
pp. 31
Author(s):  
Resky Irfanita ◽  
Asnaeni Ansar ◽  
Ayu Hardianti Pratiwi ◽  
Jasruddin J ◽  
Subaer S
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Silicon Carbide ◽  
Rice Husk Ash ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Scanning Electron

The objective of this study is to investigate the effect of sintering temperature on the synthesis of SiC produced from rice husk ash (RHA) and 2B graphite pencils. The SiC was synthesized by using solid state reaction method sintered at temperatures of 750°C, 1000°C and 1200°C for 26 hours, 11.5 hours and 11.5 hours, respectively. The quantity and crystallinity level of SiC phase were measured by means of Rigaku MiniFlexII X-Ray Diffraction (XRD). The microstructure of SiC was examined by using Tescan Vega3SB Scanning Electron Microscopy (SEM). The XRD results showed that the concentration (wt%) of SiC phase increases with the increasing of sintering temperature. SEM results showed that the crystallinity level of SiC crystal is improving as the sintering temperature increases

Preparation and Microstructure of Pressureless Sintered Si2ON2-SiC Ceramic

2011 ◽  
Vol 335-336 ◽  
pp. 699-703
Author(s):  
Hui Hui Tan ◽  
Zhu Xing Tang ◽  
Xia Zhao ◽  
He Zhang
Keyword(s):  
Bulk Density ◽  
Sintering Temperature ◽  
Pressureless Sintering ◽  
Nitriding Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Effect Of Additives ◽  
Sic Ceramic ◽  
Sintering Method ◽  
Scanning Electron

This paper introduces Si2ON2-SiC ceramic fabricated by pressureless sintering method and studies the effect of additives, nitriding temperatures on bulk density, porosity, phase composition and microstructure. It is discovered that additives MgO, CeO2 can increase the densities of Si2ON2-SiC ceramic apparently, and MgO additive has a better effect than CeO2. Nitriding temperature also is an important factor. The bulk density of the specimen with MgO additive reaches maximum at 1.91 g/cm3 when sintered at 1450 °C, and the bulk density of specimen with CeO2 additive is 1.86 g/cm3 at the same condition while the bulk density of the specimen without additive is only 1.75 g/cSuperscript textm3. The X-ray diffraction and scanning electron microscopy of the specimens show that the amount of Si2ON2 increase with the sintering temperature increase. But when the temperature is higher than 1500 °C the Si2ON2 grains will decompose into Si3N4, and Si2ON2 will vanish at 1550 °C

Dependence of the Product's Phase Composition on the Ratio of Precursors in Plasmadynamic Synthesis of Silicon Carbide

2018 ◽  
Vol 769 ◽  
pp. 114-119 ◽  
Author(s):  
Artur A. Sivkov ◽  
Artur Nassyrbayev ◽  
Maksim Gukov
Keyword(s):  
Electron Microscopy ◽  
Silicon Carbide ◽  
Synthesis Method ◽  
X Ray Diffraction ◽  
Central Electrode ◽  
X Ray ◽  
Transmission Electron ◽  
Cubic Silicon Carbide ◽  
Accelerator Channel ◽  
Coaxial Magnetoplasma Accelerator

In this work, the powder of nanoscale cubic SiC was obtained by the plasmodynamic synthesis in a coaxial magnetoplasma accelerator (CMPA) with a graphite central electrode and an accelerator channel. The synthesis method allows obtaining a product with a high content of nanoscale cubic silicon carbide. The work is aimed to study the influence of the precursor’s ratio on the product. The synthesized products were analyzed by X-ray diffraction and transmission electron microscopy.

Preparation and Characterization of Alpha Cellulose of Pineapple (Ananas comosus) Leaf Fibres (PALF)

2014 ◽  
Vol 895 ◽  
pp. 147-150 ◽  
Author(s):  
Nur Ain Ibrahim ◽  
Noriean Azraaie ◽  
Nurul Aimi Mohd Zainul Abidin ◽  
Nur Amira Mamat Razali ◽  
Fauziah Abdul Aziz ◽  
...  
Keyword(s):  
Low Cost ◽  
Research Work ◽  
Natural Fibre ◽  
Ananas Comosus ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Family ◽  
Main Component

The main component in natural fibre is cellulose (C6H10O5)n. Cellulose from agricultural by-product is abundant, low cost, eco-friendly, biodegradable, and renewable. This research work was prepared alpha cellulose from pineapple leaf fibre (PALF), which obtained from the leaves of pineapple plant, Ananas comosus belonged to the family Bromeliaceae. The treated and untreated samples were characterized using X-ray diffraction (XRD).

scholarly journals Enhancement of Acetone Gas-Sensing Responses of Tapered WO3 Nanorods through Sputtering Coating with a Thin SnO2 Coverage Layer

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 864 ◽  
Author(s):  
Yuan-Chang Liang ◽  
Yu Chao
Keyword(s):  
Gas Sensing ◽  
Microstructural Analysis ◽  
Xrd Analysis ◽  
Thin Layers ◽  
Elemental Distribution ◽  
Distribution Analysis ◽  
Acetone Vapor ◽  
X Ray Diffraction ◽  
X Ray ◽  
Composite Nanorods

WO3–SnO2 composite nanorods were synthesized by combining hydrothermal growth of tapered tungsten trioxide (WO3) nanorods and sputter deposition of thin SnO2 layers. Crystalline SnO2 coverage layers with thicknesses in the range of 13–34 nm were sputter coated onto WO3 nanorods by controlling the sputtering duration of the SnO2. The X-ray diffraction (XRD) analysis results demonstrated that crystalline hexagonal WO3–tetragonal SnO2 composite nanorods were formed. The microstructural analysis revealed that the SnO2 coverage layers were in a polycrystalline feature. The elemental distribution analysis revealed that the SnO2 thin layers homogeneously covered the surfaces of the hexagonally structured WO3 nanorods. The WO3–SnO2 composite nanorods with the thinnest SnO2 coverage layer showed superior gas-sensing response to 100–1000 ppm acetone vapor compared to other composite nanorods investigated in this study. The substantially improved gas-sensing responses to acetone vapor of the hexagonally structured WO3 nanorods coated with the SnO2 coverage layers are discussed in relation to the thickness of SnO2 coverage layers and the core–shell configuration of the WO3–SnO2 composite nanorods.

Investigation into the Thin-Film Fabrication of Intermetallic NiTi

1990 ◽  
Vol 187 ◽  
Author(s):  
A. Peter Jardine ◽  
Hong Zhang ◽  
Lysa D. Wasielesky
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Chemical Separation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thin Film Fabrication ◽  
Sapphire Substrates ◽  
Crystal Phases ◽  
Film Fabrication ◽  
Scanning Electron

AbstractThin-films of Ni and Ti were formed by sputter co-deposition of Ni and Ti onto amorphous SiO2 and single crystal NaCl and Sapphire substrates. Films were characterized as follows: a) The chemical composition of the films was analysed by EDAX b) The gross morphology was examined by Scanning Electron Microscopy. c) The crystal phases were indentified by X-ray diffraction and Electron diffraction. Intermetallic NiTi has been identified in samples annealed in vacuo at 850°C. Annealing at 500°C in vacuum produced chemical separation of the Ni and Ti. This effect may be due to a narrow solidus region for the existence of NiTi and inhomogeneities due to uneven deposition of the Ni and Ti.

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