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Cenosphere (Microsphere)

short description:

1.Fly ash hollow ball that can float on the water.
2.It is grayish white, with thin and hollow walls, light weight, bulk weight 250-450kg/m3,and particle size about 0.1 mm.
3.Widely used in the production of light weight castable and oil drilling and in various industries.


Product Detail

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.

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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 Sizeum

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
(Water Dispersal System)

6

Fire rated℃

1750

Melting Point(℃)

≧1400

Thermal Diffusivity
(m2/h)

0.000903-0.0015

Heat Conductivity Coefficient
(w/m.k)

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
(um) 

Color

True Specific Gravity
g/cc)

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

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