Significance of Density of Powders: Bulk Density vs. True Particle Density

Density of Powder - How to Measure Accurately

What is the density of material? Before we start talking specifically about measuring the density of powders, let’s look at the concept of measuring density in general. What does “density” mean? According to Encyclopedia Britannica, density is defined as mass of a unit volume of a material substance. The formula for density of a substance is d=m/V, where d…

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Overview of 2019 Quality Show – Quality Management in Laboratories and Manufacturing Operations

Quality Measurement Microspheres

By Allen Licha, PMP, Cospheric LLC Last month Cospheric attended the Quality Show in Rosemont, IL. As a global supplier of precision spherical particles, striving to provide the highest quality microparticles on the market, quality is a huge part of what we do at Cospheric. Performing accurate measurements is vital to our business. Metrology, the science of measurement, is…

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Are Microplastics Toxic to the Environment? Literature Review

Are Microplastics Toxic? Effects of Microplastics on the Environment

What are microplastics? Microplastic (MP) is a broad term used to describe microscopic plastics with sizes ranging from 1um to 5mm 1. Anything less than that can be considered nanoplastic (NP), which is also prevalent in the ocean. The shapes of microplastics can vary from fragments, fibers, pellets, film, and spheres2. The properties such as the size, shape, and…

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Janus Particles – Properties and Applications

Bichromal (half-white half-black or any other color) Microspheres, Janus Particles

What are Janus Particles? Named after two-faced Roman god Janus who looks to both the future and the past, Janus particles are typically microscopic spheres composed of two different regions. Originally the term “janus particles” was used in reference only to particles that had a hydrophobic surface on one hemisphere and a hydrophilic surface on another. The first “Janus…

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Microspheres Simulate Contamination in Self-Cleaning Gecko-Inspired Adhesives

Image of Self-cleaning Adhesive of Gecko's Toes

When choosing a controlled tracer particle for process development and troubleshooting, there are many benefits when microspheres simulate contamination. Colored and fluorescent microspheres provide a highly visible marker of controlled size and shape, allowing scientists and engineers to observe and troubleshoot the process in order to best understand where the contamination is coming from, develop best protocols for preventing…

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Silica Nanospheres as Photonic Nanostructure Found in the ‘Disco’ Clam Ctennoides Ales

Silica Nanospheres in a disco’ or ‘electric’ clam Ctenoides ales

Silica Nanospheres in a Photonic Display Scientists from University of California at Berkeley have recently discovered that a strange naturally occurring bright display of the ‘disco’ or ‘electric’ clam Ctenoides ales is actually a photonic display created by a layer of silica nanospheres. The display functions solely by reflecting light. Their article was published in the Journal of The…

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Deformable Conductive Bondline Spacers – Silver-Coated PMMA Microspheres

PMPMS AG 1 5 125 150um Deformable Conductive Bondline Spacers - Silver-Coated PMMA Microspheres

What are deformable conductive bondline spacers? Deformable conductive bondline spacers are ideal when some deflection of the particles is preferred while maintaining conductivity and compliance. Poly(methyl methacrylate), also known as PMMA or acrylic, micropshere cores can be combined with a conductive silver coating to create deformable conductive bondline spacers. Deformable conductive spacers offer benefits for Ansiotropic Conductive Film (ACF)…

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