Everything about Microspheres
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  • Bichromal Janus Particles, Microspheres, Microbeads – Stock selection or Custom-made

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

    Bichromal (half-white half-black or any other color) Microspheres, Janus Particles. In this picture - Paramagnetic black microspheres with partial white coating - Magnification 40x.

    Cospheric offers unique capability to manufacture Janus microspheres and microparticles with partial coatings and dual functionality. Currently half-shell or hemispherical coatings can be applied to any sphere (glass, polymer, ceramic) in sizes 45micron in diameter and higher. Coatings can be customized for any color and coverage of between 20% to 60% of the sphere. Each coating is custom formulated for color, charge, magnetic, electric, and surface properties, and solvent resistance per customers’ needs.

    Half-coated glass microspheres - Partial coating on glass particles

    Half-coated glass microspheres - Partial coating on glass particles. In this picture - Soda lime glass microspheres with partial red coating - Magnification 40x.

    Hemispherical coatings of less than 1 micron with tolerances as low as 0.25 micron have been routinely demonstrated.  Color combinations are truly unlimited. White, black, silver, blue, green, red, yellow, brown, purple as well as transparent microspheres have been made. Sphericity of greater than 90% and custom particle size ranges are offered.

    We have successfully coated solid and hollow glass microsphere, including soda-lime, borosilicate, and barium titanate glass microspheres. We have also coated on silver.

    Half-coated Microspheres

    Half-coated Microspheres

    Optically anisotropic spheres and janus particles with magnetic half-shells have been originally developed for applications in electronic displays, such as e-paper, but are now widely used in numerous applications in diagnostics, medical research, microscopy and biotechnology, as well as electronics, due to their ability to orient themselves in response to electromagnetic field and show a visual response. This is achieved by making spheres both bipolar and bichromal, with dipole precisely aligned with two differently colored hemispheres. As the spheres align themselves, the viewer will observe the color of one hemisphere, while the other hemisphere will be hidden from view, providing an obvious strong visible indication of the presence of the field or other stimuli.  In alternating electromagnetic field, these microspheres have been proven to spin at hundreds of times per second.

  • Market Research Report – Microspheres: Technologies and Global Markets – 2013

    REPORT SUMMARY:

    In summer of 2013 BCC Research has issued an updated market research report on Microspheres: Technologies and Global Markets. According to the report, the global market for microspheres was estimated to total nearly $2.2 billion in 2012 and is projected to increase to $2.4 billion in 2013; the market should total $4.4 billion by 2018 and have a five-year compound annual growth rate (CAGR) for of 12.6%.

    This report provides:

    • An overview of the global market and technologies for microspheres, which are spherical microparticles used as components in many advanced materials and composites, in the healthcare and personal care industries, and in many specialty research and development applications.
    • Analyses of global market trends, with data from 2012, estimates for 2013, and projections of compound annual growth rates (CAGRs) through 2018.
    • Identification of a variety of types of microspheres available on the market, as well as relevant industries, technologies and applications.
    • Examination of demand for microspheres in six major industries: composites, paints and coatings, oil and gas, cosmetics and personal care, biotechnology and life sciences, and medicine and medical devices.
    • Descriptions of different types of microspheres with respect to their chemical composition, including glass, ceramic, and polymer microspheres, and unique material properties that make them suitable for specific industries and applications.

    GLOBAL MARKET FOR MICROSPHERES, BY INDUSTRY, 2012-2018
    ($ MILLIONS)
    GLOBAL MARKET FOR MICROSPHERES, BY INDUSTRY, 2012-2018
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    SCOPE OF REPORT

    BCC analyzes the global market for microspheres from both the manufacturing and demand points of view. Since there are several types of microspheres that vary drastically in quality, chemical properties, functionality and price, each type of microsphere is discussed in detail, including materials, manufacturing processes, advantages, prices and primary applications. Similarly, due to these variations microsphere use in six major industries are discussed and analyzed in detail.

    Detailed analysis and market forecasts are provided per industry, type of microsphere and geographic region through 2018. The report describes major players in the industry and examines recent advances in technology, newly evolving markets and companies as well other factors influencing supply and demand.

    This report analyzes microspheres—homogeneous microparticles of 1 micron to 1,000 microns in diameter. Microspheres can be solid or hollow and made from a variety of raw materials.

    ANALYST CREDENTIALS

    BEWARE of rip-off reports that have been published this year by Research and Markets, Transparency Market Research, and other non-USA-based research firms, they contain partially plagiarized (reworded) and some completely inaccurate information.

    This authentic and accurate report was published by BCC research – a leading market research company specializing in reporting on changes driven by science and technology.  The analyst for this report is an expert in the field of microspheres. Yelena Lipovetskaya, CTO of Cospheric LLC, has more than 15 years of experience taking new technologies from concept to production in a variety of industries, including rotating microspheres electronic paper, charged microparticles for printing toner, digital displays, optical fiber, and medical devices.

    Yelena is the author of numerous applications, patents and published articles on microspheres technology and its applications and has held technical and managerial positions at Xerox Corp, Corning Inc., Cardinal Health, Gyricon, and Cbrite Inc. Yelena has a Bachelor’s degree in Chemical Engineering from Polytechnic University and a Master’s degree in Materials Science and Engineering from Rochester Institute of Technology, both in New York.

  • Negatively-charged Yellow Microparticles – Back in Stock

    Highly Negative Charged Microspheres - Polyethylene, Selection of Sizes 5 to 500um

    Highly Negative Charged Microspheres - Polyethylene, Selection of Sizes 5 to 500um, 1.0g/cc

    Cospheric’s neutrally-buoyant highly charged yellow microspheres have a strong negative charge and are used by scientists in medical technology, biotechnology, applied physics and research. Precise particles with known density of 1.0g/cc that behave in a known way are useful as a model particles in simulation experiments.  Particles in a range of diameters from 5micron to 500micron(0.5mm) are currently back in stock.

    Bright yellow polymer microparticles of high sphericity are spherical polyethylene beads that are specifically designed with density ~1.0g/cc for suspension in fresh water,  serving as seed or tracer particles and enabling flow visualization and Particle Image Velocimetry PIV analysis of fluid flow in a device. It is often advantageous to color code the particles by size to better understand which part of the process the spheres of the specific size were able to pass through, or where the contamination in the process is coming from. Microspheres are supplied in dry powder form and are color stable in solution. No solvents are used in the manufacturing process. Polyethylene is inert to most solvents.

    Cospheric also offers unique capability to manufacture Bichromal janus microspheres and microparticles with partial coatings and potentially dual functionality. Currently half-shell or hemispherical coatings can be applied to any sphere (glass, polymer, ceramic) in sizes 45micron in diameter and higher. Coatings can be customized for any color and coverage of between 20% to 60% of the sphere. Each coating is custom formulated for color, charge, magnetic, electric, and surface properties, and solvent resistance per customers’ needs. Hemispherical coatings of less than 1 micron with tolerances as low as 0.25 micron have been routinely demonstrated.  Color combinations are truly unlimited. White, black, silver, blue, green, red, yellow, brown, purple as well as transparent microspheres have been made. Sphericity of greater than 90% and custom particle size ranges are offered.

    It would be interesting to combine these highly charged yellow microspheres with a partial paramagnetic black coating and investigate the behavior of these spheres in electromagnetic field.

  • Silane and Fluorochemical Coated Glass Spheres

    Solid glass imparts visual and material benefits that cannot be replicated when spheres are made of other materials such as ceramics or polymerics, aluminum oxides, or silicas and mineral fillers. Solid glass refracts [bends] and reflects light. Most ceramics [with exceptions] do not transmit light or exhibit specular [mirror-like] reflection due to their internal crystalline structures and surface irregularities. Instead of being reflected back, the light is “trapped” in the structure and emitted as diffuse or scattered reflectance, which is not as strong or direct as light transmitted through glass, which produces mirror-like reflectance.  Prizmalite glass spheres distributed by Cospheric offer off the shelf pre-coated spheres for enhancing these effects.

    Silane coated solid glass spheres with increased hydrophobicity are offered to improve the dispersion of spheres throughout paints and coatings.  Silane coated spheres are not recommended for pure water solutions as the spheres will be too hydrophobic to wet.

    Fluorochemical Coating is available for paint and coating applications where it is desired to bring the spheres to the top of the surface of the coating.  This is best used in applications where retro reflectance is desired.

    The following products are offered in both Silane and Fluorochemical Coating.
    P2011SL  3-6um mean diameter solid soda lime glass
    P2015SL  8-12um mean diameter solid soda lime glass
    P2050SL  35-45um mean diameter solid soda lime glass
    P2075SL 65-75um mean diameter solid soda lime glass
    P2453BTA 40-60um mean diameter solid barium titanate glass with aluminum shell.

    Solid Glass Spheres:

    • Act as mini-magnifying glasses to deliver visually truer color
    • Clarify and magnify the visual impact of pigments and metallic flakes
    • Create a richer, wetter, deeper look
    • Visually extend expensive color-shift pigments to create cost-effective new looks
    • Prop up other pigments, mica and aluminum flakes
    • Increase exposed surface area and visual impact
    • Facilitate even dispersion of colorants and reflectors
    • Are anti-mottling agents that enhance visual consistency
    • Act as mini-ball bearings to improve material flow and reduce flow lines
    • Provide color consistency from all viewing angles
  • Magnetic Microspheres – Paramagnetic

    Magnetic microspheres, more accurately called paramagnetic microspheres have unique properties that are useful for a variety of applications.

    Paramagnetism is a form of magnetism that occurs only in the presence of an externally applied magnetic field. Paramagnetic materials are attracted to magnetic fields and hence have a relative magnetic permeability of ≥1 (a positive magnetic susceptibility). The magnetic moment induced by the applied field is linear in the field strength and rather weak.1

    1. Wikipedia “paramagnetism