Cenosphere (Microsphere)
Product Introduction
Cenosphere is a kind of fly ash hollow ball that can float on the water. It is grayish white, with thin and hollow walls, light weight, bulk weight 250-450kg/m3,and particle size about 0.1 mm.
The surface is closed and smooth,low thermal conductivity, fire resistance ≥ 1700℃, It's an excellent thermal insulation refractory, widely used in the production of light weight castable and oil drilling.
The main chemical composition is silica and aluminum oxide, with fine particles, hollow, light weight, high strength, wear resistance, high temperature resistance, thermal insulation, insulation flame retardant and other functions, now widely used in various industries.
Chemical composition
| Composition | SiO2 | A12O3 | Fe2O3 | SO3 | CaO | MgO | K2O | Na2O |
| Content(%) | 56-65 | 33-38 | 2-4 | 0.1-0.2 | 0.2-0.4 | 0.8-1.2 | 0.5-1.1 | 0.3-0.9 |
Physical properties
|
Item |
Test index |
Item |
Test index |
|
Shape |
High fluidity spherical powder |
Particles Size（um） |
10-400 |
|
Color |
Grayish white |
Electric Resistivity（Ω.CM） |
1010-1013 |
|
True Density |
0.5-1.0 |
Moh's Hardness |
6-7 |
|
Bulk Density（g/cm3) |
0.3-0.5 |
PH Value |
6 |
|
Fire rated℃ |
1750 |
Melting Point（℃） |
≧1400 |
|
Thermal Diffusivity |
0.000903-0.0015 |
Heat Conductivity Coefficient |
0.054-0.095 |
|
Compressive Strength（Mpa） |
≧350 |
Refractive Index |
1.54 |
|
Burning loss rate |
1.33 |
Oil Absorption g(oil)/g |
0.68-0.69 |
Specification
|
Cenosphere (Microsphere) |
|||||||
|
No. |
Size |
Color |
True Specific Gravity |
Passing Rate |
Bulk Density |
Moisture Content |
Floating Rate |
|
1 |
425 |
Grayish white |
1.00 |
99.5 |
0.435 |
0.18 |
95 |
|
2 |
300 |
1.00 |
99.5 |
0.435 |
0.18 |
95 |
|
|
3 |
180 |
0.95 |
99.5 |
0.450 |
0.18 |
95 |
|
|
4 |
150 |
0.95 |
99.5 |
0.450 |
0.18 |
95 |
|
|
5 |
106 |
0.90 |
99.5 |
0.460 |
0.18 |
92 |
|
Features
(1)High fire resistance
(2)Light weight, heat insulation
(3)High hardness, high strength
(4)Insulation does not conduct electricity
(5)Fine particle size and large specific surface area
Application
(1)Fire-resistant insulation materials
(2)Building materials
(3)Petroleum industry
(4)Insulating materials
(5)Coating industry
(6)Aerospace and space development
(7)Plastics industry
(8)Glass reinforced plastics products
(9)Packaging materials
