Increased Stiffness and Hardness: Ceramic particles, such as alumina (Al2O3) or silicon carbide (SiC), significantly improve the stiffness and surface hardness of PEEK, making it more resistant to mechanical stress and deformation.

Enhanced Thermal Stability: Ceramic reinforcements raise the temperature resistance of PEEK, allowing it to perform reliably in high-heat environments, often up to or exceeding 300°C

Improved Wear Resistance: The ceramic particles impart greater wear and abrasion resistance, making ceramic reinforced PEEK suitable for components that experience continuous friction or heavy mechanical wear.

Low Thermal Expansion: Ceramic reinforcement helps reduce the coefficient of thermal expansion, enhancing dimensional stability in environments with fluctuating temperatures.

Excellent Chemical Resistance: Despite the ceramic additives, PEEK retains its inherent resistance to chemicals such as acids, solvents, and bases, making it suitable for corrosive environments.

Electrical Insulation: In most cases, ceramic-reinforced PEEK maintains good electrical insulating properties, depending on the type of ceramic used.