High Strength Silicon Nitride Ceramic Plunger with Wear and Corrosion Resistance

Product Specification

Silicon Nitride Ceramic Plunger/Rod: A Comprehensive Analysis of a High-Performance Industrial Precision Component

Product Introduction

The Silicon Nitride Ceramic Plunger is a cylindrical industrial ceramic component manufactured from high-performance silicon nitride material. Renowned for its exceptional all-around properties, it is an ideal replacement for traditional metals and alumina ceramics in extreme operating conditions. This product is made from high-purity silicon nitride powder using advanced forming and sintering processes, resulting in a dense microstructure. The surface is typically precision-ground and polished to achieve extremely high dimensional accuracy and smoothness, ensuring stability and long service life in demanding applications.

Primary Applications

Silicon Nitride Ceramic Plungers are widely used in fields with stringent requirements for strength, wear resistance, and thermal shock resistance:

• High-Temperature Industrial Furnaces & Equipment: Used as kiln rollers, support rods, and fixtures in semiconductor sintering, metallurgy, and glass manufacturing.

• Chemical & Pump/Valve Systems: Employed as core components in metering pumps and plunger pumps for conveying corrosive, high-purity, or particle-laden media.

• Machinery & Automotive Industry: Used as balls and rollers for high-performance bearings, especially in high-speed, high-temperature, electrically insulating, or corrosive environments.

• Electronics & Semiconductor Sector: Utilized for insulating jigs, carriers, and heater plate components in chip manufacturing processes.

• Research & Defense: Applied in special structures and wear-resistant parts requiring lightweight and high rigidity.

Product Advantages

• Exceptional Mechanical Strength & Hardness: High hardness and excellent wear resistance, offering a much longer service life than most metals and alloys.

• Outstanding Thermal Shock Resistance: Can withstand rapid temperature changes without cracking, a significant advantage over zirconia ceramics.

• Superior Corrosion Resistance: Resistant to most acids and alkalis, suitable for corrosive environments.

• Low Density & Self-Lubricating Properties: Lightweight, reducing inertia in moving parts; possesses a degree of self-lubrication for a lower coefficient of friction.

• Excellent Electrical Insulation: Maintains good electrical insulation properties even at elevated temperatures.

Specifications Table

Manufacturing Process

The production of Silicon Nitride Ceramic Plungers follows a precise multi-step process:
Raw Material Preparation → Isostatic Pressing → CNC Machining (Green State) → Gas Pressure Sintering → Precision Grinding/Polishing → Non-Destructive Testing → Cleaning & Packaging. Gas Pressure Sintering is the critical step for achieving a high-density, high-performance product.

Usage Instructions

1. Installation: Ensure mating components are clean during installation. Avoid hard impacts; it is recommended to use specialized tools for smooth pressing.

2. Mating Materials: It is advised to pair with materials of high hardness and wear resistance (e.g., cemented carbide, specialty steels, or itself) to optimize service life.

3. Avoid Stress Concentration: Despite high strength, ceramics are brittle materials. Designs and usage should avoid sharp corners and uneven stress loads.

4. Cleaning: Can be cleaned using ultrasonic cleaners or neutral solvents. Avoid using highly corrosive chemicals like hydrofluoric acid.

After-Sales Service

We provide comprehensive technical support and after-sales service, including product technical consultation, custom manufacturing, and application solution advice. All products undergo strict quality inspection before leaving the factory and are supplied with a certificate of compliance.

FAQ (Frequently Asked Questions)

• Q: What is the main advantage of Silicon Nitride Ceramic compared to Zirconia Ceramic?
  A: Silicon Nitride offers superior thermal shock resistance and fracture toughness, making it less prone to cracking under rapid temperature changes. It also has a lower density.

• Q: Can you customize non-standard sizes and shapes?
  A: Yes. We support custom manufacturing and machining based on customer drawings.

• Q: What tolerance grade can the product achieve?
  A: Through precision grinding, dimensional tolerances can typically be controlled within ±0.01mm, depending on the product size and customer requirements.