Cenosphere powder consists of low-density, hollow, spherical particles primarily made of alumina and silica. Since it comes from the fly ash of thermal power plants, it offers high compressive strength, excellent insulation, and strong chemical stability. Thanks to its lightweight and versatile nature, many industries prefer using it as an additive.
About Cenosphere Powder
Hollow ceramic microspheres consist of microscopic, hollow spheres that form as byproducts of coal combustion. Their density ranges between 0.4 to 0.8 g/cm³, making them incredibly light while still offering mechanical durability. The name comes from the Greek words kenos (empty) and sphaira (sphere), reflecting their structure.
Common Names for Cenosphere Powder
In industrial and scientific communities, cenosphere powder is also known by other terms such as:
Hollow ceramic microspheres
Fly ash microspheres
Alumino-silicate microspheres
Lightweight ceramic powder
These names often reflect specific properties or application areas but refer to the same product.
Industrial Applications
Cenosphere powder is used in numerous industries due to its superior thermal resistance and low weight:
Oil & Gas Industry: Used in drilling muds and well cementing to reduce slurry weight and improve thermal insulation.
Paints & Coatings: Enhances thermal insulation and reduces material weight.
Polymer & Plastics: Acts as a lightweight filler to improve strength and lower resin consumption.
Construction & Concrete: Improves fire resistance and thermal properties in lightweight cement blocks.
Refractories: Used in high-temperature environments for insulation.
Automotive: Added to brake pads and friction materials to reduce weight without compromising strength.
Grades and Specifications of Cenosphere Powder
Hollow ceramic microspheres is available in various grades based on color, density, and floating capacity. Common classifications include:
White and Grey Grades: Chosen for their purity and aesthetics.
Floating Grades: Over 95% floaters, suitable for lightweight applications.
Grading is essential for industries that require consistency in particle size and bulk density.
Packaging Options
To ensure quality and ease of transport, cenosphere powder is packed in:
25 kg multilayer paper bags
500–1000 kg jumbo bags on pallets
Moisture-resistant and dust-free packaging is critical to preserve material integrity during storage and shipping.
HS Code and CAS Number
For global trade compliance, the following codes are used to classify cenosphere powder:
HS Code: 2621.90 – Residues from coal-based industrial processes
CAS Number: 93924-19-7
These identifiers are essential for customs clearance and regulatory documentation.
Storage and Handling Guidelines
Store cenosphere powder in a dry, well-ventilated area to protect it from moisture and contaminants. Even though the material is non-toxic and chemically inert, you should still wear a protective mask during handling to avoid inhaling fine dust.
Why Use Cenosphere Powder?
Cenosphere powder offers several key advantages:
Reduces weight in finished products
Enhances thermal insulation
Improves mechanical strength
Lowers material cost in formulations
Eco-friendly and recyclable
Its combination of performance and sustainability makes it a valuable material in modern industrial processes.
In short
Cenosphere powder is a powerful solution for industries seeking to improve product performance while reducing weight and cost. Whether used in oil drilling, paints, polymers, or concrete, it brings measurable benefits in efficiency and sustainability. Thanks to its variety of grades, reliable packaging, and global supply capability, cenosphere powder plays a key role in driving innovation across multiple sectors.