Home / Technical Data / Eccospheres® Glass Microspheres Product Specifications

Trelleborg Emerson & Cuming, Inc.
290 Forbes Boulevard
Mansfield, MA 02048-1817
USA
Tel: +1 774 719 1400
Fax: +1 774 719 1410

Technical Data

Eccospheres® Glass Microspheres Product Specifications

Eccospheres® glass microspheres are hollow thin-walled glass microspheres, to the naked eye they resemble a free flowing powder; magnification reveals them to be near perfect spheres

Appearance	Eccospheres® glass micropsheres appear in the form of a free flowing white powder
Particle Size Range (% by weight)	Test Method TEC QSD
Sieve Analysis	Test method ASTM D1921-96
	SID-311Z	A maximum of 2% by weight will be retained on a +125 micron sieve
	SID-350Z	A maximum of 2% by weight will be retained on a +125 micron sieve
	SI-250	A maximum of 2% by weight will be retained on a +125 micron sieve
	FTD-250	A maximum of 2% by weight will be retained on a +125 micron sieve
	SID-230Z	A maximum of 4% by weight will be retained on a +125 micron sieve
	SID-200Z	A maximum of 3% by weight will be retained on a +150 micron sieve
	SI-200	A maximum of 2% by weight will be retained on a +125 micron sieve
	FTD-200	A maximum of 2% by weight will be retained on a +125 micron sieve
True Particle Density	ASTM D2840. Nominal density +/-0.02g/cc
Packing Factor	ASTM D3101. Ratio of bulk density to true density. Range: 62-66%
Isostatic Collapse Pressure	ASTM D3102. Minimum 80% survival at given pressure
Alkalinity	ASTM D3100. Alkalinity 0.02-0.1 milliequivalents per gram
pH	ASTM D4876 6.5-9.0
Moisture Content	TEC QSD <1% by weight maximum
Flotation	TEC QSD. Minimum of 98% by bulk volume float in water
Softening Temperature	ASTM E794.
	SID and SI series soften at 800°C / 1472°F
	FTD series soften at 700°C / 1292°F
Dielectric Constant	AST D150. 1.36-1.63 when tested at a frequency of 100MHz
Dissipation Factor	ASTM D150. Mean 0.0005 when tested at frequencies 1MHz - 8.6GHz
Thermal Conductivity	0.073-0.125 W/m.K at 25°C, based on theoretical calculations
Internal Gas Composition	Eccospheres® glass microspheres contain inert gases in a partial vacuum. Pressure <0.5 atm
Refractive Index	Sodium Borosilicate Glass
	Refractive Index at 5893 Angstroms at 25°C = 1.458 Refractive Index at 1500 Angstroms at 25°C = 1.448
Young's Modulus	At 25°C = 62GPa
Shelf Life	Eccospheres® glass microspheres will remain free flowing for up to 2 years if kept in the original unopened container in a dry unheated warehouse

Last updated 2007-06-18 |

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