hollow glass bead
 A cenosphere is a lightweight, inert, hollow sphere comprised largely of silica and alumina and filled with inert air or gas. Cenospheres are a naturally occurring by-product of the burning process at coal-fired power plants. They are produced at the high temperature of 1,500 to 1,750 degrees Celsius through complicated chemical and physical transformation.The color of cenospheres is light gray and the specific gravity of them is about 0.4, which gives them a great buoyancy.Cenospheres are hard and rigid, light, waterproof, innoxious, and insulative.
Chemical Properties
|
SiO2 |
Al2O2 |
Fe2O3 |
Na2O |
K2O |
CaO |
MgO |
TiO |
Lose in burning |
Other |
£¥ |
52-65 |
26-35 |
2.3 |
0.4 |
0.4 |
0.9 |
0.5 |
1.4 |
1.1 |
5.0 |
Physical Properties
Diameter
(um) |
Melting point
(degrees Celsius) |
Compressive strength
£¨kg/cm2£© |
Heat conductivity
(kcal/m.h.¡æ) |
Specific gravity
cm3 |
Water contained
(%) |
Color |
1-10 |
>1430 |
1000-7000 |
0.05~0.1 |
1.8~2.45 |
=<1% |
White |
20-400 |
>1430 |
100-350 |
0.05~0.1 |
0.4~0.8 |
=<1% |
White |
Cenospheres Application
Hollow spheres (cenospheres) have been used for almost 30 years in many fields. They have the advantage of being light and cheap. They can be used in a variety of products, including oports equipment, insulation, automobile bodies, marine craft bodies, paints, and fire and heat protection devices.
The sample-list below shows the types of products that would be enhanced with cenospheres.
|
PLASTICS: BMC, SMC, Injection Molding, Extruding, PVC flooring, Film, Nylon, High Density Polyethylene, Low Density Polyethylene, Polypropylene |
|
CERAMICS: Refractory, Tile, Firebricks, Aluminum Cement, Insulating Materials, Coatings |
|
ROCK OIL: Oil well construction, Heat preservation of oil pies, Materials used again erosion |
|
CHEMISTRY: Paints, Fillers, Dope |
|
RUBBER: Tyre, |
|
SPORTS: Surf boards, bowling balls, Flotation Devices, Golf equipment |
|
Military: Explosives, Screen shielding, Soundproof |
|
SPACE: Aerospace coatings, Aerospace composites |
|
SAILING: Ship bodies, Floating materials, Navigation marks |
|
AUTOMOTIVE: Cmposites, Undercoating, Engine parts, Brake pads, Trim molding, Body fillers, Plastics, Sound proofing materials |
|
CONSTRUCTION: Specialty cements, Mortars, Grouts, Stucco, Roofing materials, Acoustical panels. |
Cenospheres Specification
AVAILABLE PRODUCTS
No. |
Size(Micron) |
Sieve number |
Specific gravity(g/cm3) |
Remarks |
1 |
250-147 |
60 -100 |
0.4 |
|
2 |
172-130 |
80 -120 |
0.4 |
|
3 |
147-108 |
100 -150 |
0.4 |
|
4 |
108-77 |
150 -200 |
0.4 |
|
5 |
Below77 |
Above200 |
0.4 |
|
6 |
54-10 |
Above 300 |
0.4 |
Mixed |
7 |
As required by clients. |
|
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