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  2. Insulator (electricity) - Wikipedia

    en.wikipedia.org/wiki/Insulator_(electricity)

    Some materials such as glass, paper and PTFE, which have high resistivity, are very good electrical insulators. A much larger class of materials, even though they may have lower bulk resistivity, are still good enough to prevent significant current from flowing at normally used voltages, and thus are employed as insulation for electrical wiring ...

  3. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

  4. Thermal insulation - Wikipedia

    en.wikipedia.org/wiki/Thermal_insulation

    Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials.

  5. Electrical resistivity and conductivity - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistivity_and...

    The material's electrons seek to minimize the total energy in the material by settling into low energy ... Wood is widely regarded as an extremely good insulator, ...

  6. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    Building insulation is material ... the Australia energy code also requires insulation ... Air is a very poor conductor of heat and therefore makes a good insulator ...

  7. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

  8. Cork thermal insulation - Wikipedia

    en.wikipedia.org/wiki/Cork_thermal_insulation

    With a water vapour diffusion resistance factor of 5–54.61, [9] [10] cork materials have good hydric properties for moisture insulation. Fino et al. [11] investigated the thermal insulation of walls covered with medium density expanded cork panes. To determine the impact of moisture on heat transfer through the cork wall, they conducted a ...

  9. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    Insulation is a barrier material to resist/reduce substance (water, vapor, etc. ) /energy (sound, heat, electric, etc.) to transfer from one side to another. Heat/ Thermal Insulation is a barrier material to resist / block / reflect the heat energy (either one or more of the Conduction, Convection or Radiation) to transfer from one side to another.