Powder Deposition
Powder Deposition - Related Videos
09:11
Porosimetry of a Silica Alumina Powder
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Surface area and pore size distribution are attributes used by adsorbent and catalyst manufacturers and users to ensure quality control and to determine when products are at the end of their useful lives. The surface area of a porous solid is directly related to its adsorption capacity or catalytic activity. The pore size distribution of an adsorbent or catalyst is...
08:14
Single Crystal and Powder X-ray Diffraction
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University X-ray crystallography is a technique that uses X-rays to study the structure of molecules. X-ray diffraction (XRD) experiments are routinely carried out with either single-crystal or powdered samples. Single-crystal XRD: Single-crystal XRD allows for absolute structure determination. With single-crystal XRD data, the exact atomic positions can be observed, and thus bond lengths and angles can be determined. This...
10:52
Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
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Cited by 7 •
2015
This report describes the use of a custom-built system to perform aerosol deposition of thick films of yttrium iron garnet onto sapphire substrates at RT. The deposited films are characterized using scanning electron microscopy, profilometry, and ferromagnetic resonance to give a representative overview of the capabilities of the technique.
14:20
Absolute Quantum Yield Measurement of Powder Samples
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Cited by 16 •
2012
In this video we will demonstrate measuring and calculating absolute quantum yield and chromaticity coordinates directly in powder samples using the Hitachi F-7000 Quantum Yield Measuring System.
08:25
Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
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Cited by 15 •
2015
We present the synthesis of the organic-based ferrimagnet vanadium tetracyanoethylene (V[TCNE]x, x~2) via low temperature chemical vapor deposition (CVD). This optimized recipe yields an increase in Curie temperature from 400 K to over 600 K and a dramatic improvement in magnetic resonance properties.
FAQs
Particle size affects how powder flows, travels through a gas stream or applicator, and distributes across the target surface. Because particle size is linked to flow behavior and deposition uniformity, controlling it can help produce more consistent layers or patterns. In chemical materials research, this control is important when coating performance or analytical-sample consistency depends on an even deposit.
Several mechanisms can retain the deposited material, including electrostatic attraction, mechanical interlocking, chemical bonding, and heat-induced fusion. Their relative importance depends on the powder, substrate, and deposition conditions. Recognizing the active mechanism helps explain differences in coating durability and guides selection of conditions for functional coatings, composite materials, catalysts, or analytical samples.
Surface chemistry influences how powder interacts with the substrate, while deposition conditions affect transport and placement. Together with particle size and flow behavior, these variables can determine whether material forms a uniform coating, layer, or pattern. Managing them improves reproducibility and can support the intended performance of chemically prepared surfaces and composite materials.
A typical workflow transports dry powder through a gas stream or applicator toward a selected substrate, distributes the particles over the target area, and promotes adhesion using the mechanism suited to the material and surface. The resulting deposit is then considered in terms of placement, uniformity, and performance. Adjusting particle and process conditions supports controlled layer formation.
The technique is useful when researchers need to place powdered material as a controlled coating, layer, or pattern. Chemistry applications described for it include catalyst preparation, functional coatings, composite materials, and analytical samples. These uses take advantage of controlled placement while allowing particle size, flow behavior, surface chemistry, and deposition conditions to be adjusted for the intended material outcome.
Controlling the powder and deposition conditions can improve material efficiency, coating durability, and reproducibility. These outcomes matter because they connect the deposition process with practical material performance and repeatable preparation. In manufacturing or laboratory work, a more consistent deposit can help maintain the quality of functional coatings, catalyst-related materials, composites, and analytical samples.