Potential Spark Erosion Approaches to Silicon Nanoparticles Production

This article demonstrates potential approaches to the production of Silicon Nanoparticles (SiNPs) using spark erosion in forms of Wire-EDM (WEDM), Die-sink and Micro -EDM. Utilizing the data from research work on such conventional spark erosion approaches, a novel method of nanoparticle production called high pressure flushing spark erosion has been introduced in this paper. This is an automated prototype machining system that utilizes deionized water sprayed @ 0.8 MPa through a rotating copper tool, boring on boron doped silicon ingot workpiece. SiNPs comprising an average diameter of 50nm were generated with approximate productivity of 1.5g/hr. The results demonstrate that the process holds excellent potential as an industrialized SiNPs preparation method in terms of size and productivity.

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Raman spectroscopic study on boron-doped silicon nanoparticles

Vibrational Spectroscopy ◽

10.1016/j.vibspec.2014.02.014 ◽

2014 ◽

Vol 72 ◽

pp. 62-65 ◽

Cited By ~ 7

Author(s):

Miho Momose ◽

Masao Hirasaka ◽

Yukio Furukawa

Keyword(s):

Spectroscopic Study ◽

Silicon Nanoparticles ◽

Raman Spectroscopic ◽

Raman Spectroscopic Study ◽

Boron Doped ◽

Doped Silicon

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Photovoltaic Performance of Inorganic–Organic Heterojunction Solar Cells Using Boron-Doped Silicon Nanoparticles with Controlled Conductance

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2019.15827 ◽

2019 ◽

Vol 19 (5) ◽

pp. 2913-2924 ◽

Cited By ~ 2

Author(s):

Keita Kato ◽

Keisuke Sato ◽

Naoki Fukata ◽

Kenji Hirakuri

Keyword(s):

Solar Cells ◽

Silicon Nanoparticles ◽

Photovoltaic Performance ◽

Heterojunction Solar Cells ◽

Boron Doped ◽

Doped Silicon

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Novel Method of Developing Nanosilica Coated Alumina Micro Abrasives Using Silicon Nanoparticles Generated from Spark Erosion as the Source

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.799-800.479 ◽

2015 ◽

Vol 799-800 ◽

pp. 479-482

Author(s):

Ahmad Farooq ◽

Ali Abd El-Aty

Keyword(s):

Silicon Nanoparticles ◽

Tetragonal Zirconia ◽

Silica Coating ◽

Sem Images ◽

Luting Cement ◽

Spark Erosion ◽

Alumina Particles ◽

Novel Method ◽

Average Size ◽

Tetragonal Zirconia Polycrystal

Silica coated alumina abrasives, used for abrading the surface of Yttria stabilized tetragonal zirconia polycrystal ceramics, were produced in order to achieve successful bonding with resin luting cement. The source of the silica coating was from Silicon Nanoparticles (SiNPs) that were produced from spark erosion in high pressure flushing of deionized water. SEM images verified average size distribution of the SiNPs to be between 30-50nm. In contrast to the tribochemical methods that are used widely to produce such abrasives, a completely novel dry physical process was opted for this experiment. By optimization of the conditions, 2g of purified SiNPs was mixed with 20g of alumina μ-particles (approximated diameter of 100μm), in presence of 25ml ethanol, mixed thoroughly to form slurry. Heated up to 120°C for 20 minutes to evaporate the ethanol, the resultant powder mix was compacted and uploaded in furnace at temperature of 1100°C for 2hrs. This formed an oxide layer on the SiNPs which consequently formed bonding with the alumina particles. SEM/EDS results validate substantial amount of coating of silica on alumina. The paper hereby demonstrates a novel method of producing silica coated alumina abrasives, which is a dry and cleaner substitution method compared to tribochemical approach.

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Preparation of integrated circuits for TEM electromigration in situ studies

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100145753 ◽

1986 ◽

Vol 44 ◽

pp. 882-883

Author(s):

J. V. Maskowitz ◽

W. E. Rhoden ◽

D. R. Kitchen ◽

R. E. Omlor ◽

P. F. Lloyd

Keyword(s):

Integrated Circuits ◽

Crystallographic Orientation ◽

Silicon Wafers ◽

Minimum Size ◽

Test Vehicle ◽

In Situ Studies ◽

Boron Doped ◽

Doped Silicon ◽

Drill Holes

The fabrication of the aluminum bridge test vehicle for use in the crystallographic studies of electromigration involves several photolithographic processes, some common, while others quite unique. It is most important to start with a clean wafer of known orientation. The wafers used are 7 mil thick boron doped silicon. The diameter of the wafer is 1.5 inches with a resistivity of 10-20 ohm-cm. The crystallographic orientation is (111).Initial attempts were made to both drill and laser holes in the silicon wafers then back fill with photoresist or mounting wax. A diamond tipped dentist burr was used to successfully drill holes in the wafer. This proved unacceptable in that the perimeter of the hole was cracked and chipped. Additionally, the minimum size hole realizable was > 300 μm. The drilled holes could not be arrayed on the wafer to any extent because the wafer would not stand up to the stress of multiple drilling.

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Boron-Doped TiO2 (B-TiO2): Visible-Light Photocatalytic Di-functionalization of Alkenes and Alkynes

New Journal of Chemistry ◽

10.1039/d1nj01752g ◽

2021 ◽

Author(s):

Mona Hosseini-Sarvari ◽

Atefe Valikhani

Keyword(s):

Visible Light ◽

Doped Tio2 ◽

Boron Doped ◽

Novel Method ◽

Visible Light Photocatalytic

Boron doped TiO2 (B-TiO2) was prepared, characterized, and successfully applied as a reusable, inexpensive, available, and heterogeneous nano photocatalyst under visible light for a novel method of construction of phenacyl...

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A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles

Crystals ◽

10.3390/cryst11080885 ◽

2021 ◽

Vol 11 (8) ◽

pp. 885

Author(s):

Nicole Knoblauch ◽

Peter Mechnich

Keyword(s):

Large Scale ◽

Preparation Method ◽

Cost Effective ◽

High Porosity ◽

Thermochemical Cycles ◽

Redox Cycles ◽

Redox Kinetics ◽

Direct Infiltration ◽

Novel Method ◽

Functional Components

Zirconium-Yttrium-co-doped ceria (Ce0.85Zr0.13Y0.02O1.99) compacts consisting of fibers with diameters in the range of 8–10 µm have been successfully prepared by direct infiltration of commercial YSZ fibers with a cerium oxide matrix and subsequent sintering. The resulting chemically homogeneous fiber-compacts are sinter-resistant up to 1923 K and retain a high porosity of around 58 vol% and a permeability of 1.6–3.3 × 10−10 m² at a pressure gradient of 100–500 kPa. The fiber-compacts show a high potential for the application in thermochemical redox cycling due its fast redox kinetics. The first evaluation of redox kinetics shows that the relaxation time of oxidation is five times faster than that of dense samples of the same composition. The improved gas exchange due to the high porosity also allows higher reduction rates, which enable higher hydrogen yields in thermochemical water-splitting redox cycles. The presented cost-effective fiber-compact preparation method is considered very promising for manufacturing large-scale functional components for solar-thermal high-temperature reactors.

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