Zirconia ceramic plungers, with their combination of high hardness and excellent toughness, are able to resist wear and maintain surface integrity and smoothness under long-term continuous friction conditions. In mechanical seals, zirconia ceramic plungers significantly reduce friction loss, extend seal life and reduce equipment maintenance costs.
In contrast, although alumina ceramic plungers also have higher hardness, the toughness is not enough; in the high-speed, high-pressure friction environment, its surface is prone to flaking, cracks and other problems, resulting in a decline in abrasion resistance, affecting the normal operation and service life of the equipment.
Zirconia ceramic plunger in strong acid and alkali, organic solvents and other extreme chemical media, showing strong corrosion resistance, can work stably for a long time, so it is commonly used in chemical reactor lining, corrosive liquid transfer pumps and other equipment.
Alumina ceramic plunger has good chemical stability in regular chemical environments, but when facing strong oxidizing acid, strong alkali and other special corrosive media, its surface may undergo chemical reaction and corrosion phenomenon, which limits its application in special chemical environments.
Alumina ceramics have a high thermal conductivity and can quickly conduct heat; in the field of electronic equipment, heat dissipation has obvious advantages; it can be used as a heat sink, substrate and other components, effectively reducing the temperature of electronic components to ensure their stable operation.
Zirconia ceramics have a very small coefficient of thermal expansion, can maintain structural stability in environments with rapid temperature changes, and are not easy to deform or crack due to thermal expansion and contraction, so they are widely used in the manufacture of high-temperature components in high-temperature furnaces, aerospace and other fields.
Zirconia ceramic plungers have a density of approximately 6 g/cm³, which is almost twice that of aluminum oxide ceramic plungers (3.7 – 3.95 g/cm³).
This higher density gives zirconia ceramic plungers a higher compressive strength and allows them to withstand greater mechanical loads, making them suitable for use in industrial equipment with high strength requirements.
Detailed comparison table of the specification differences between the two.
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