High Hardness Zirconia Ceramics Plunger ZrO2 Ceramic Polish Cylinder for Pump

﹡Product Overview

Our precision-polished zirconia (ZrO₂) ceramic plungers deliver ultra-high wear resistance, corrosion immunity, and smooth operation for critical pump applications. Engineered for zero-leak performance in harsh chemical and high-pressure environments.

﹡Key Technical Specifications

✅ Material: 3Y-TZP Zirconia – 94% ZrO₂ + 5.2% Y₂O₃

✅ Density: ≥6.05 g/cm³ – Near-zero porosity (<0.05%)

✅ Hardness: 1,250-1,350 HV – 2× harder than tungsten carbide

✅ Surface Finish:

Standard Polish: Ra ≤0.05µm (mirror grade)

Super Finish: Ra ≤0.02µm (for HPLC applications)

✅ Mechanical Properties:

Flexural Strength: 1,200-1,500 MPa

Fracture Toughness: 6-8 MPa·m¹/²

✅ Thermal Stability:

Max Operating Temp: 800°C continuous

Thermal Shock Resistance: ΔT >1,000°C

✅ Standard Dimensions:

Diameter: Ø3-50mm (±0.005mm)

Length: 10-300mm (custom to 500mm)

Concentricity: ≤0.01mm

﹡Industry Applications

1. Chemical Metering Pumps

Acid/alkali dosing plungers – Resists 30% HCl, 50% NaOH

Solvent transfer systems – Zero swelling vs. polymers

2. High-Pressure Liquid Chromatography (HPLC)

Polished plungers – Ultra-low particle generation (<5ppb)

Bio-pharma pumps – FDA-compliant material

3. Oil & Gas

Mud pump seals – Withstand 20,000psi abrasive slurries

CO₂ injection systems – Dry-running capable

4. Food Processing

Sanitary pump components – USDA/3-A Dairy approved

Chocolate/caramel pumps – Non-stick surface

5. Industrial Machinery

Waterjet intensifiers – 100M cycle lifespan

Die-casting plungers – Molten metal resistance

﹡Competitive Advantages

✔ Zero Corrosion – Immune to acids/alkalis (except HF)

✔ Self-Lubricating – Coefficient of friction: 0.1-0.15

✔ Precision Matched – Diametral tolerance ±0.002mm

✔ Custom Configurations:

Tapered/stepped designs

Internal cooling channels

Laser-etched identification

﹡Production process

1. Grind and crush the raw materials to be slurry or powder

2. se-different method to making the slurry or powder into semi-finished products

3. Put the semi-finished products into the kiln for dewaxing and sintering;

4. After forming and sintering, Ceramic Sleeves products can also be processed by subsequent CNC precision machining according to the drawing requirements. Then Q/C test.

5. Finally package Ceramic Sleeves by bubble paper or cartons and place it on tray for delivery

﹡Certifications

﹡Company

Yixing Shengda Refractory Ceramic Co, Ltd. was established in Yixing City, China in 1995, witha production area of over 10,000m2. lt is an enterprise specializing in the production of aluminaceramic,zirconia ceramic,slicon nitride, silicon carbide and other precision ceramic products. 

And we also produce ceramic band heaters, ceramic terminal block, cordierite and mullite ceramic parts an other ceramic products.

﹡Ceramic Properties