Definition
A method of heating a non-conducting material by placing it in a high-frequency alternating electric field. The rapidly reversing field causes the molecules of the material to oscillate, and the resulting internal friction produces heat throughout the material.
Plain English
A way of heating something that does not conduct electricity by placing it inside a fast-changing electrical field. The molecules inside the material jiggle back and forth, and that movement creates heat from the inside out.
Context Anchor
Seen in aircraft maintenance and materials discussions, especially where plastics, adhesives, composites, or other nonmetal parts are being formed, bonded, or cured.
Derivation
‘Dielectric’ comes from the Greek ‘dia’ (through) plus ‘electric,’ meaning a material that an electric field can pass through without conducting current. So ‘dielectric heating’ is heating that happens inside an insulating material as the electric field passes through it.
Why Pilots Care
A pilot is unlikely to use dielectric heating in normal cockpit operation, but the term may appear in maintenance or repair information. Understanding it helps separate a controlled material-heating process from ordinary electrical heating or fire damage.
Analogy
It is the same principle a microwave oven uses to heat food — the field flips back and forth millions of times a second, and the molecules heat up from being shaken.
Grounding Statement
Picture a plastic aircraft part being warmed evenly during a repair process because energy is acting inside the material, not just on its surface.
Intuition Check
Dielectric heating does not mean the material is heated because electricity flows through it like a wire. It means an electric field acts on an insulating material and produces heat inside it.
Example Sentence 1
The technician used dielectric heating to cure the adhesive bonding the composite skin to the airframe.
Example Sentence 2
Dielectric heating produced even temperature rise through the insulator without overheating the surface layers.