SIGRATHERM® Graphitized Microballoons

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Description

SGL Carbon’s graphitized microballoons (with 15% sinkers) are designed as a unique and special filler material e.g. for epoxy, polyurethane or polyester resins to reduce their density and increase their strength and dimensional stability. They function as non-halogenated flame-resistant filler and support to provide greater thermal insulation. Phenolic resin microspheres are carbonized and graphitized at 2000°C (3632°F) to produce graphitized microballoons of high purity.

This material data has been provided by SGL Carbon.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyTemperatureValueComment

Particle size D50

51 μm

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Specific surface area

1.25 m²/g

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BET; DIN ISO 9277

Tap density

23.0 °C

0.18 g/cm³

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ASTM D3800

True particle density

23.0 °C

0.45 g/cm³

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DIN 51913

Water content

23.0 °C

0.1 %

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ASTM C562

Dimension

PropertyValue

Dimensions

Particle size < 50 mesh/300 µm: 98% (ASTM E11); Particle size D50 = 51 μm (ISO 13320)

Mechanical

PropertyTemperatureValueComment

Compressive strength

23.0 °C

2 - 4.2 MPa

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ASTM D3102-78, minimum value for 90% and maximum value for 80% survival

Thermal

PropertyTemperatureValueComment

Ash content

23.0 °C

0.2 %

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ASTM C561

Chemical properties

PropertyValue

Carbon

99.8 %

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Sodium

2.5E-3 %

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