Particle Analyzer
HORIBA LA-300
Application Reports (2)
Particle Size Distributions: Dynamic Image Analysis Beats Laser Diffraction
Laser diffraction is the most frequently used measurement technique for the analysis of particle size distributions in the range 1 micron to 1 mm in the context of quality control. Modern laser diffraction systems offer some convincing advantages such as short measurement times, easy operation and reproducible analysis results. However, they also have various disadvantages: Even if the instruments have been calibrated and validated, an absolute particle size measurement is not possible. Various round robin tests have shown that the analysis results depend strongly on the type of instrument and even on the particular model and software version.
Überprüfung von Laserstreulichtanalysatoren
Die Funktion eines Laserbeugunssystems sollte regelmäßig überprüft werden. Die Häufigkeit dieser Tests ist abhängig von der Nutzung und der Risikobeurteilung, aber in den meisten Branchen wird davon ausgegangen, dass eine Überprüfung mindestens einmal jährlich erfolgen sollte. Für viele Labore stellt sich die Frage: Welche(r) Standard(s) sollen für die Überprüfung verwendet werden? Dieser Artikel enthält eine Zusammenfassung der aktuell gültigen Empfehlungen von HORIBA Instruments zur Prüfung von Laserstreulichtanalysatoren der LA-Serie.
Customer Magazine "the sample" (2)
the sample - Particle Measurement
In this special issue of “the sample” we present the entire product range of particle analyzers on offer from Retsch Technology.
Test Reports (12)
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Asphalt Emulsions
Asphalt-aggregate roads have traditionally been made by an asphalt-coated aggregate that has been hot-mixed at a central plant. Asphalt emulsions have made the manufacturing, storage, and road construction a much simpler process. Asphalt emulsions are droplets of asphalt dispersed in water with the aid of an emulsifying agent. Particle size of the asphalt droplets is critical to stability and application performance.
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CMP Slurry Measurement
Chemical mechanical polishing (or planarization) is the most popular technique for removing the surface irregularities of silicon wafers. Typical CMP slurries consist of a nano-sized abrasive dispersed in acidic or basic solution. A chemical reaction softens the material during mechanical abrasion. The abrasive particles have a size distribution which directly affects critical metrics including rate of removal and wafer defects. Particle size analysis is therefore a key indicator of CMP slurry performance. The popularity and utility of several particle sizing techniques will be discussed within.
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Chocolate
Particle size measurement of chocolate samples is a vital factor in producing a consistent and attractive final product. Several stages of manufacturing are controlled by particle size and the particle size of cocoa powder used in chocolate affects color and flavor strength.
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Coffee
The flavor and strength of coffee depends on the coffee beans selected, the roasting process, the brewing method and the fineness of the ground coffee used. In commercial grinding, the process is well developed and monitored by the use of laser diffraction particle size analyzers. The speed, consistency, and ease of use have made it the most popular method for process control.
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Electronic Ceramics
Particle size analysis plays a crucial role in the manufacture of electronic materials for dielectric applications. These materials include single-phase powders such as barium titanate as well as formulations that contain many different oxide phases. In all cases, the particle size distribution has a great impact on their processing and performance.
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Iron Oxides
Iron oxides are used in a wide variety of forms and have many uses. The majority are used as pigments or for their magnetic properties. Particle sizing in each of these applications is critical to final product performance.
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Laser Diffraction: Dry Method Development
Developing an appropriate method for measuring particle size distribution of powders dispersed in air using laser diffraction requires a structured approach. The basic goals for developing a dry method include: place a representative sample into the analyzer, disperse the sample using a pressure that breaks up agglomerates but not individual particles, choose appropriate system settings for measurement, and test for reproducibility.
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Milk Homogenization
Milk is an emulsion that is homogenized to reduce the average particle size, which improve its consistency and extends shelf life. The homogenization process is expensive and careful control of the process can improve quality and consistency and reduce operating costs.
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Organic Pigments
A general definition of a pigment could mean any substance that alters the color of a material through selective color absorption. Pigments are used to color a broad range of products including ink, paint, cosmetics, fabric and food.
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Powder Coatings
Powder coatings are alternatives to paints that are comprised of a resin and a pigment. The powder is sprayed on the part and attracted by the electrostatic charge applied to the part. The item is then heated in an oven to cure the resin and form a solid layer. Particle size is important to provide the optimum surface finish and minimize process waste.
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Solid Oxide Fuel Cell Materials
Solid oxide fuel cells (SOFC’s) offer the potential to greatly reduce man’s dependence on coal and oil for the production of electricity. They are clean, quiet and efficient. At the heart of these devices lies a complex combination of polycrystalline ceramic materials, each having to meet a particular set of structural and electrochemical requirements.
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Zironicum Oxide
Zirconium oxide is a common metal oxide ceramic with a wide range of uses due to its thermal stability, strength, chemical resistance, and optical properties. In most applications, particle size is an important parameter in the final product performance.
Subject to technical modifications and errors
