Thermal Conductivity and Heating Efficiency of Far-infrared Honeycomb Ceramic Combustion Plates
Briefly introduces the thermal conductivity and heating efficiency of far-infrared honeycomb ceramic combustion plates.
Thermal Conductivity and Heating Efficiency of Far-infrared Honeycomb Ceramic Combustion Plates
Thermal conductivity determines the rate at which heat is transferred from the interior to the surface of a material, directly affecting the temperature uniformity and radiation efficiency of the surface.
Comparison of Thermal Conductivity and Heating Efficiency for Various Materials
Material | Thermal Conductivity (W/m•K) | Heating Efficiency Characteristics |
Silicon Carbide | 15-30 | Highest (Extremely fast heat conduction, surface temperature difference ≤ ±5℃) |
Cordierite | 1.5-2.5 | Medium (Slow heat conduction, lag in heating) |
Corundum-Mullite | 2.0-3.0 | Medium |
Alumina (95% Ceramic) | 2.0-3.0 | Medium to Low |
Silicon carbide has a thermal conductivity more than 10 times that of cordierite, allowing for rapid heat transfer to the plate surface, stable radiation output, and the highest heating efficiency.
Synergy of Thermal Conductivity and Thickness
Thin Plate (10-15mm) + Low Thermal Conductivity: Thickness compensates for insufficient thermal conductivity, resulting in relatively fast heating.
Thick Plate (25-30mm) + Low Thermal Conductivity: Large temperature difference between center and surface, lowest efficiency.
Thin Plate + High Thermal Conductivity: Fastest heating, suitable for rapid response.
Thick Plate + High Thermal Conductivity: Large heat storage and uniform plate surface, suitable for continuous high temperatures.
Selection Recommendations
Priority considerations | Recommended Materials |
Highest radiation efficiency, continuous high temperature | Silicon carbide |
Frequency start-stop, thermal shock resistance priority | Cordierite |
Overall balance | Silicon carbide or composite materials |
Cost sensitive | Cordierite |
Summary
Thermal conductivity and plate thickness need to be considered together when selecting. Thin plates can make up for the lack of low thermal conductivity. Silicon carbide is preferred for efficiency, and cordierite is preferred for thermal shock resistance.