SIGRAFINE® isostatic graphites R6340

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Description

SIGRAFINE® Isostatic graphite is an ultra-fine grain graphite used for electronic applications where the mechanical properties of other fine grain graphites are inadequate. The term "Isostatic Graphite" stands for isostatically molded graphite. This means that the raw material mixture is compressed into rectangular or round blocks in a so called Cold-Isostatic-Press (CIP). Compared to other technologies such as extrusion or vibration molding, this technology can produce the most isotropic form of artificial graphite. In addition, isostatic graphite generally tends to have the smallest grain sizes of all artificial graphites. Typical properties of the material:


  • Extremely high thermal and chemical resistance
  • Excellent thermal shock resistance
  • High electrical conductivity
  • High thermal conductivity
  • Increasing strength with rising temperature
  • Easy to machine
  • Can be produced with very high purity < 5 ppm
  • This material data has been provided by SGL Carbon.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    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

    PropertyValueComment

    Bulk density

    1.72 g/cm³

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    Grain size

    15.0 μm

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    Permeability coefficient

    0.25 cm²/s

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    Porosity

    15.0 %

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    open porosity

    Mechanical

    PropertyValueComment

    Compressive strength

    90 MPa

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    Elastic modulus

    11 GPa

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    Dynamic Modulus

    Flexural strength

    45 MPa

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    Hardness, Rockwell

    80.0 [-]

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    10/100

    Thermal

    PropertyTemperatureValueComment

    Ash content

    0.0005 %

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    depending on the code, it can also be less than 5 ppm

    0.003 %

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    depending on the code, it can also be less than 5 ppm

    Coefficient of thermal expansion

    3.2e-06 1/K

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    @20-200°C

    Thermal conductivity

    20 °C

    105 W/(m·K)

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    Electrical

    PropertyValue

    Electrical resistivity

    1.2e-05 Ω·m

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    Chemical properties

    PropertyValueComment

    Aluminium

    1e-06 - 5e-06 %

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    depending on the code, it can also be less

    Boron

    2e-06 - 1e-05 %

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    depending on the code, it can also be less

    Calcium

    1e-06 - 2e-05 %

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    depending on the code

    Chromium

    1e-06 - 2e-06 %

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    depending on the code, it can also be less

    Cobalt

    1e-06 - 2e-06 %

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    depending on the code, it can also be less

    Copper

    1e-06 - 2e-06 %

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    depending on the code, it can also be less

    Iron

    2e-06 - 5e-05 %

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    depending on the code

    Magnesium

    1e-06 - 1e-05 %

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    depending on the code

    Manganese

    1e-06 %

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    max.

    Nickel

    1e-06 - 0.0001 %

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    depending on the code, it can also be less

    Phosphorus

    2e-06 - 1e-05 %

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    depending on the code, it can also be less

    Silicon

    0.0001 - 0.0002 %

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    depending on the code, it can also be less

    Titanium

    1e-06 - 2e-05 %

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    depending on the code

    Vanadium

    1e-06 - 5e-05 %

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    depending on the code

    Technological properties

    Property
    Processing methods

    Isostatically pressed