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Typical Physical Properties

 Property  Value

Physical Form

Free flowing powder

Individual Particle Shape

Hollow spheres

Colour

 White

Particle Size

 20 – 500 microns

Relative Density

 0.65 – 0.85 g/cc

Bulk Density

 0.3 – 0.4 g/cc

Compressive Strength

 4,800 psi (33 MPa)

Oil Absorption

 ~ 7g/100g

pH of Water Dispersion

 7 ± 1

Thermal Conductivity

 0.1 W/m/°C

Coefficient of Thermal Expansion

 d= 8 x 10-6

Melting Point

 1600 °C – 1800 °C

Hardness

 6 Mohs scale

Refractive Index

 1.53

Electrical Resistance

1015 ohm cm

Moisture Content

 0.1% (maximum)

Floaters by Volume

 94% (minimum)

For general representation only, not for specification purposes.

Please contact Envirospheres or its authorised distributors for more information, technical service and starting point formulas.

Product Range

 Group  Product  Grade  Approximate Particle Mean

[Microns]

 Particle Size Range

[Microns]

Particle Distribution
[%]
 Coarse  E-SPHERES® SL  SL500  300  Above 500
180 – 500
Below 180
 0 – 20
70 – 100
1-10
 SL350  300 Above 500
150 – 500
Below 150
 0 -5
75 – 100
0 – 20
 SL300  150 Above 300
150 – 300
Below 150
 0 -1
54 – 100
0 -45
 Medium  E-SPHERES® SL  SLG  130  Above 300
106 – 300
Below 106
 0 -1
64 – 100
0 -35
 SL150  100  Above 150
75 – 150
Below 75
 0 – 2
78 – 100
0 -20
 Fine  E-SPHERES® SL  SL125  80  Above 125
38 – 125
Below 38
 0 – 2
88 – 100
0 -10
 SL75  45  Above 75
Below 75
 0 -2
98 – 100

E-SPHERES® SL White Hollow Ceramic Microspheres are offered in a range of particle distributions:

  • Coarse Grades E-SPHERES® SL500 | SL350 | SL300
  • Medium Grades E-SPHERES® SLG | SL150
  • Fine Grades E-SPHERES® SL125 | SL75

Chemical Composition

Silicon Dioxide SiO2 (Silica)

55 – 60%

Aluminium Oxide Al2O3 (Alumina)

36 – 40%

Iron Oxide Fe2O3(Hematite)

0.4 – 0.5%

Titanium Dioxide TiO2 (Rutile)

1.4 – 1.6%

Typical Chemical Analysis E-SPHERES® Ceramic Microspheres

These figures are for general representation only, not for specification purposes

A world of possibilities

E-SPHERES® are an incredibly versatile additive, which also add value and improve performance of engineered materials and products.

Contact us for more information about how E-SPHERES® could enhance your technologies.