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Trelleborg AEM Eccospheres® SI-250 Sodium Borosilicate Glass Microspheres

Category Ceramic , Glass , Other Engineering Material , Additive/Filler for Polymer
Manufacturer Trelleborg AEM
Trade Name Eccospheres®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Trelleborg AEM Eccospheres® SI-250 Sodium Borosilicate Glass Microspheres.pdf
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Material Notes:
Eccospheres® glass microspheres are hollow thin-walled glass microspheres composed of sodium borosilicate glass. To the naked eye they resemble a fine, white, free-flowing powder. However, magnification reveals them to be near perfect spheres.PropertiesHigh temperature resistanceGood density/strength ratiosClean surface chemistryNarrow particle size distributionLow thermal conductivityLow dielectric constantLow dissipation factorSurface salts formed during manufacture are removed via acid washing. This reduces the alkali content and results in a clean surface chemistry compatible with almost any resin system or surface coating.All information provided by Trelleborg Emerson & Cuming
Physical Properties Metric English Comments
Pellet Density 0.230 - 0.270 g/cc
0.00831 - 0.00975 lb/in³
ASTM D2840
Particle Size 52 µm
52 µm
TEC QSD
pH 6.5 - 9.0
6.5 - 9.0
ASTM D4876
Mechanical Properties Metric English Comments
Modulus of Elasticity 62.0 GPa

@Temperature 25.0 °C
8990 ksi

@Temperature 77.0 °F
62.0 GPa

@Temperature 25.0 °C
8990 ksi

@Temperature 77.0 °F
Thermal Properties Metric English Comments
Thermal Conductivity 0.0730 - 0.125 W/m-K
0.507 - 0.868 BTU-in/hr-ft²-°F
Softening Point 800 °C
1470 °F
ASTM E794
Optical Properties Metric English Comments
Refractive Index 1.448

@Wavelength 1500 nm
1.448

@Wavelength 1500 nm
1.458

@Wavelength 589.3 nm
1.458

@Wavelength 589.3 nm
Electrical Properties Metric English Comments
Dielectric Constant 1.36 - 1.63

@Frequency 1e+8 Hz
1.36 - 1.63

@Frequency 1e+8 Hz
ASTM D150
Dissipation Factor 0.00050

@Frequency 1.00e+6 - 8.60e+9 Hz
0.00050

@Frequency 1.00e+6 - 8.60e+9 Hz
ASTM D150
Processing Properties Metric English Comments
Moisture Content <= 1.0 %
<= 1.0 %
TED QSD
Descriptive Properties Value Comments
Floatation (% bulk volume) 99
TEC QSD
Isostatic Collapse Pressure, Min. 80% Survival (psi) 1800
ASTM D3102
Packing Factor (min) 62
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