Semiconductor body for a spark plug of a turbine engine

A spark plug of a semiconductor type for a turbine engine, the spark plug comprising a free cylindrical end that extends along the main axis (A), the free end comprising, centered on the main axis, a central electrode, and an outer electrode,

• wherein the spark plug comprising a semiconductor body revolving around the main axis, the semiconductor body is arranged between the central electrode and the outer electrode, the semiconductor body comprising a baseplate and an upper portion extending from the baseplate along the main axis, the baseplate comprising a bottom surface substantially defined in a plane (B) perpendicular to the main axis and a first conical surface intended to cooperate at least partially by form-fitting with a contact surface of said outer electrode of the spark plug,
• wherein a predetermined radial clearance being provided between the semiconductor body and the outer electrode,
• wherein the spark plug further comprising an insulating element attached to the semiconductor body and intended to insulate the central electrode from the outer electrode and to provide a support for the semiconductor body, at least partially against a contact surface of the outer electrode substantially along the main axis (A),
• wherein the upper portion comprises an interface opposite the bottom surface along the main axis (A) and featuring a profile that is at least partially corrugated configured to at least prevent the displacement and/or rotation of the semiconductor body in the spark plug, the corrugated profile features alternating summits and troughs having ridges, the ridges of the summits are tangent to a first plane parallel to the plane of the bottom surface and the ridges of the troughs are tangent to a second plane parallel to the plane of the bottom surface.