High-Temperature Ceramic Coating Powder

High-Temperature Ceramic Coating Powder is a specialized material formulation intended for use in the manufacture of domestic appliances. It is applied as a protective and functional coating on components such as heating elements, oven interiors, and cooktop surfaces. The powder is processed through thermal spraying or sintering to form a continuous ceramic layer that bonds to metallic substrates. This layer provides thermal insulation, corrosion resistance, and surface durability, and is designed to withstand repeated thermal cycling encountered in normal appliance operation.

The material composition includes aluminum oxide (Al2O3), zirconium oxide (ZrO2), and silicon carbide (SiC), which contribute to its thermal and mechanical properties. Key parameters, as listed in the directory, include a maximum service temperature of 1200–1400 °C (ISO 28764), a coefficient of thermal expansion of 8–10 ×10^-6/°C (ISO 17562), bulk density of 1.2–1.6 g/cm³ (ISO 3923-1), purity level of 99.5–99.9% (ISO 9001), flow rate of 25–35 s/50g (ISO 4490), moisture content ≤0.1% (ISO 787-2), particle size of 15–45 μm (ISO 13320), thermal conductivity of 1.5–2.5 W/(m·K) (ISO 22007-2), dielectric strength of 10–15 kV/mm (IEC 60243-1), adhesion strength of 15–25 MPa (ISO 4624), hardness of 8–9 Mohs (ASTM D3363), and thermal shock resistance of ΔT 200–300 °C (ISO 28765). These values are reference ranges and must be verified for the specific product model and application.

Selection of this powder should consider the operating temperature, thermal cycling, substrate material, and required surface properties. Verification of parameters and standards should be conducted with the legal manufacturer or supplier. Maintenance signals include coating degradation such as cracking, peeling, or loss of adhesion, which may indicate thermal or mechanical stress beyond design limits. Failure boundaries are defined by the maximum service temperature and thermal shock resistance; exceeding these can lead to coating failure.

The powder is applied to a prepared metallic substrate via thermal spraying or sintering. During thermal processing, the powder particles melt or partially melt and coalesce to form a dense, continuous ceramic layer. This layer bonds mechanically and chemically to the substrate, creating a barrier that reduces heat transfer, resists chemical attack, and protects against wear. The ceramic's low thermal expansion and high thermal shock resistance allow it to accommodate temperature changes without cracking. The coating's effectiveness depends on proper surface preparation, application parameters, and adherence to specified thickness and density.