Rauschert Ceramic infra-red plaque 26515/1-8101-101

This ceramic infra-red plaque (132 mm × 92 mm × 13 mm) is made of porous technical ceramics. It is installed in gas burners using radiant surface combustion, where the gas-air mixture burns across the plaque surface to produce even high-temperature infrared radiation. The material withstands repeated thermal cycling, resists chemical exposure, and maintains stable dimensions under mechanical load. Its porous structure keeps the mixture permeable, while its dielectric and mechanical properties suit demanding burner applications.

Plaques of this type are selected by overall dimensions (length, width, thickness) and the shape of the mounting edges, as the part sits in a metal frame or is held by a sealing gasket. Before fitting, inspect the burner frame distortion and gasket condition; an uneven seal causes local overheating and early failure. Verify gas pressure and air adjustment within the manufacturer's range for infra-red operation — improper mixture leads to sooting or overheating. When a burner uses multiple plaques, replace the full set to ensure uniform radiation and avoid thermal stress from mismatched ageing.

Visible defects such as cracks, chips, or glaze separation cause flashback or incomplete combustion. Local overheating appears when the seal against the frame is uneven, often leading to early failure. Sooting or overheating of the plaque indicates incorrect gas/air mixture. Check the plaque surface for burnout patterns and inspect the frame and gasket for damage.