What Is Glass Microsphere?
Hollow Glass Microspheres and Other Similar Systems
Hollow glass microspheres and similar systems are increasingly popular, thanks to various environmental factors. In addition to being used in environmental remediation, they are an effective way to reduce the number of greenhouse gases (GHG) produced. Multiple countries have implemented policies to help mitigate the effects of these emissions. In the United States, for example, several states have recently committed to reducing their GHG emissions through executive action plans.
What Is Glass Microsphere?
A glass microsphere is a microscopic sphere made from glass. They are used in a variety of applications. Their sizes usually range from one micrometer to one thousand micrometers. However, they can also be smaller or larger. The diameter of a glass microsphere depends on its application.
A solid glass microsphere is also known as a glass bead and is commonly used as a resin extender. While it does not offer the low density of hollow spheres, it can enhance a material's physical properties. Potters Industries produces Spheriglass made from 30% solid glass microspheres.
Glass microspheres have many uses, and their density can influence the formulation of a part. The typical loading for a glass microsphere is 25 percent of the volume of the resin. This density is enough to affect the overall part's weight and VOC content. This property allows glass microspheres to be used in products where weight is a key consideration.
Microspheres can be made opaque or partially translucent. They can be conductive, fluorescent, or magnetic. In addition, surface treatments can improve the bonding between the microsphere and its matrix. One company specializing in coating glass microspheres with metals is Microsphere Technology Ltd., in Edinburgh, Scotland. The coating can be as thin as a nanometer or as thick as several micrometers.
Where is hollow glass or glass microsphere used?
Hollow glass microspheres are a type of glass particle with low specific gravity. These particles are used in various applications and exhibit good thermal conductivity and heat resistance. Additionally, they exhibit a low dielectric constant and can be used in applications that require low dielectric constants.
These spheres are made of different materials, such as silica and multi-oxide glass. While pure silica microspheres are the most common, it is possible to manufacture them using a proprietary Borosilicate-Sodalime glass blend. Zirconia and silica are also popular materials used in the fabrication of microspheres. The surface tension effect helps achieve almost perfect spherical shapes.
A hollow glass microsphere is an excellent vehicle for various therapeutic agents, as they have unique capabilities. Because of their size and shape, they can effectively encapsulate fragile drugs, extending their stay in the gastric region. They can also help control the release of drugs by providing a uniform surface area.
While hollow glass microspheres are commonly used in a wide range of applications, they differ in their chemical composition, size, and texture. Some are made of glass, while others are made of plastic. Some microspheres are more susceptible to heat damage and chemical interactions. The molding process and the product's end use can affect these properties.
Another important property of hollow glass microspheres is their low density. These microspheres can be used to extend the properties of liquids and resins. The disadvantage of solid glass microspheres is that they do not have a low density of hollow glass microspheres. However, their higher density can enhance their physical properties. Some manufacturers, such as Potters Industries, use 30% or more solid glass microspheres in their products, significantly reducing warpage.
What are glass microspheres used for?
Hollow glass microspheres are small, hollow particles typically made of low-density glass. They are often used as resin extenders because they do not lose their density when crushed and thus improve the physical properties of a material. For example, 3M's iM30K hollow glass microspheres have a high isostatic compressive strength of 30,000 psi and a density of 0.6 g/cc. Because of their low density, iM30K microspheres can be used in molded parts up to 20% without compromising their impact strength. Furthermore, their small particle size means they can reduce the final weight of the part by 15 percent.
Hollow glass microspheres are used in many different applications. They can be used in pharmaceutical applications for controlling the release of radioactive tracers or in manufacturing plastics for use in electronics. They are also used to fill polymer resins and seal surfaces. For instance, surfboard shapers use them to seal EPS foam blanks with epoxy. Another application for hollow glass microspheres is in flip-chip technology, where they can be used as components of flip-chip electronics.
Hollow glass microspheres are an excellent choice for coating applications. Their low surface area and density allow easy rolling through a coating material. They also increase the solid composition of a coating. This helps ensure proper application and increases the value of the manufactured coating. Moreover, they are resistant to chemicals and heat.
These hollow glass microspheres are often made from ceramic materials. Some are coated with special materials and have unique properties. Furthermore, they can be opaque or paramagnetic. In addition, they can also have fluorescent or phosphorescent properties.
How are hollow glass microspheres made?
Hollow glass microspheres are made using an organic process. The main ingredients are Sio2 and Al2o3. These glass particles have a low density and good heat insulation performance. This makes them a useful raw material for thermal insulation coatings. In addition, they are relatively light.
Hollow glass microspheres have a high ball-type rate, which increases their mobility, reducing the viscosity of the resin mixture. They also reduce the internal stress of composite materials. This means that they will produce less heat during manufacturing. This reduces the risk of inadequate lubrication or partial thermal decomposition. Furthermore, hollow glass microspheres can increase production efficiency by 15% to 20%. They are available in a wide range of sizes and qualities.
One way to create these microspheres is to heat them and remove the sulfur content. Treating glass makes the amount of sulfur as low as 0.5%. The boron content in the glass also facilitates the transformation into microspheres. The amount of boron in the glass can range from 1 to 15%.
High-quality microspheres are more expensive than their cheaper counterparts. Low-cost microspheres may have poor shape and uniformity, wide particle-size distribution, and dust or debris. They may also contain a small proportion of non-spherical particles, which can negatively affect the finished product.
A microsphere of a higher density can be obtained by reducing the particle feed delivery. It is important to start with a smaller particle size to achieve this. Tests carried out under five micrometers have shown that this method is feasible, although it does reduce yield.
Which is the disadvantage of glass microspheres?
Hollow glass microspheres are small, hollow spheres made of borosilicate glass. The material has properties that make it useful in various applications. They are lightweight, have low thermal conductivity, and are non-toxic, non-combustible, and highly stable. They are particularly effective as product fillers in artificial marble, putty, and building materials.
A thin-shelled hollow glass microsphere's compressive strength is similar to that of talc, yet the density is much lower. A typical hollow glass microsphere has a density of 0.6 g/mL, or one-fourth that of talc. However, the density of a hollow glass microsphere varies considerably.
Soda lime glass microspheres are the most popular and economically viable type of hollow glass microsphere. For higher-temperature applications, Borosilicate glass is preferred. Barium titanate glass is another popular glass formulation because it offers a high density and index of refraction. But most hollow glass microspheres are made from a proprietary Borosilicate-Sodalime glass blend. Ceramic materials like zirconia and silica are also commonly used as microspheres.
Hollow glass microspheres are used for drug delivery in a variety of applications. Traditionally, targeted drug delivery has relied on controlled dosage. However, this approach had several drawbacks. First, these small spheres were hard to hold in the gastrointestinal tract. This resulted in variations in the rate of gastric release and decreased the amount of medicine absorbed by the patient. In addition, it made the medication less effective because of the short residence time in the tract.
The second disadvantage of hollow glass microspheres is their fragility. Chemicals can easily damage this material, but the advantage is that it is less brittle than a traditional polymer.
Hollow glass microspheres supplier
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