How do glass-ceramic hobs/cooktops only heat up in one spot (where the element is)?

An electric element/halogen lamp sits under the cooktop giving off thermal energy, but how is this heat only localised to the element and doesn't warm up the rest of the glass/ceramic?

Which thermal property is responsible for this?

Processing determines microstructure, which determines the properties. Is it because of 1- directional grains/crystal?

1 Answer

  • johnm
    Lv 7
    6 years ago
    Favorite Answer

    They use CERAN (TM) by Schott. "Because of its low transverse heat conductivity, neighboring areas of the cooking zone stay relatively cool and the heat is transmitted directly to pots and pans." see source.

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