Product Name:
Alumina Ceramic Metering Pump Core Components
Product Material:
High-Purity Alumina Ceramic (Al₂O₃ ≥99.6%). For pump liners and valve seats, monolithic alumina structures are used; for reciprocating plungers/piston rods or diaphragms承受高冲击, Zirconia Toughened Alumina (ZTA) can be employed to enhance toughness.
Material Characteristics:
Extremely high hardness (Mohs hardness 9) and superior wear resistance, Excellent chemical corrosion resistance (resists strong acids, alkalis, organic solvents, and salts), Superior electrical insulation and dielectric strength, Good biocompatibility and low adsorption, High rigidity and low coefficient of thermal expansion for excellent dimensional stability, Surfaces can achieve ultra-low roughness (Ra < 0.05 µm) to reduce flow resistance and wear, Material is pure and non-contaminating, does not leach metal ions.
Application Fields:
Ceramic plungers/pistons, pump cylinders/sleeves, check valve balls and seats, diaphragms for high-precision, low-pulsation metering pumps; Quantitative transfer of slurries and high-purity chemicals in semiconductor wet processes (e.g., CMP); Precise addition and filling of culture media, buffer solutions, and protein solutions in biopharmaceuticals; Precise metering of corrosive chemicals and additives in the petrochemical industry; Dosing of flocculants and pH adjusters in environmental water treatment.
Application Industries:
Fluid Control, Biomedical (Pharmaceuticals, In-vitro Diagnostics), Semiconductor Manufacturing, Petrochemical, New Energy (Electrolyte preparation), Advanced Mechanical Equipment (Precision Spraying, Dispensing).
Processing Difficulties:
Manufacturing ceramic plungers with ultra-high length-to-diameter ratios, straightness, and roundness (straightness can reach <1 µm/100mm); Machining pump cavities and valve bodies with complex irregular flow channels, high surface finish, and tight dimensional tolerances; Achieving ultra-thin (can be <0.5mm), highly uniform forming and sintering of ceramic diaphragms while ensuring their fatigue strength; Ensuring mating parts like plungers/cylinders and balls/seats achieve micron-level fitting accuracy for high volumetric efficiency and low leakage; Controlling cumulative tolerances after multi-component assembly to guarantee overall pump performance.
Processing Flow:
Proportioning and dispersion of high-purity, ultra-fine alumina powder → Isostatic pressing (plunger green bodies) or injection molding (complex valve bodies/pump cavities) → Precision machining of green bodies → High-temperature sintering for densification → Rough grinding of OD/ID → Precision CNC grinding to achieve basic dimensions and shape → Ultra-precision grinding (specialized honing, centerless grinding) to achieve final dimensions and nano-level surface finish → Laser marking and精密 metrology (dimensions, geometric tolerances, roughness) → Matching of paired components and performance pre-testing (leakage, friction coefficient) → Ultrasonic cleaning and clean packaging
Delivery Period:
Standard plunger/sleeve components: 40-65 days
Complex integrated valve bodies, ultra-thin diaphragms, or full sets of matched components: 70-120 days
The core components of the alumina ceramic metering pump represent a revolutionary solution for precise fluid metering and transportation under extreme conditions. In applications involving corrosive, high-purity, or media containing fine particles, traditional metal pump parts are prone to corrosion and wear, leading to decreased metering accuracy, product contamination, and frequent maintenance. The pump core components made of high-performance alumina ceramics, with their nearly eternal wear resistance, complete chemical inertness, and achievable extremely high dimensional accuracy, redefine the standards of reliability, cleanliness, and service life of metering pumps, becoming a key factor in enhancing process control quality and production efficiency.
Key Features:
