Term: polygranular carbon
https://doi.org/10.1351/goldbook.P04730

Definition:
A carbon material composed of grains, which can be clearly distinguished by means of optical microscopy.

Note: Industrial carbon materials (such as electrodes) are mostly polygranular, but special grades are agranular materials, such as @G02639@, @C00831@ or @P04963@. Such materials are covered by the term @A00188@.

Related Terms:
1) glass-like carbon (http://doi.org/10.1351/goldbook.G02639).
2) carbon fibres (http://doi.org/10.1351/goldbook.C00831).
3) pyrolytic carbon (http://doi.org/10.1351/goldbook.P04963).
4) agranular carbon (http://doi.org/10.1351/goldbook.A00188).
5) carbon material (http://doi.org/10.1351/goldbook.C00841).

Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 501 (https://doi.org/10.1351/pac199567030473)

Citation: 'polygranular carbon' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04730

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