Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications

Introduction

Silicon Nitride (Si₃N₄) Ceramic is an advanced engineering material manufactured through powder metallurgy and high-temperature sintering processes. Its unique covalent-bonded structure endows it with exceptional mechanical, thermal, and chemical properties, including ultra-high strength, exceptional thermal shock resistance, outstanding wear resistance, and excellent corrosion resistance. Recognized as one of the most versatile high-performance ceramics, it is widely used in demanding industrial applications.

Key Advantages

• High Strength & Hardness: Superior wear life, significantly outperforming traditional metals.

• High-Temperature Resistance: Maintains mechanical properties and shape stability up to 1,200°C.

• Corrosion Resistance: Highly resistant to most acids, alkalis, and corrosive media.

• Low Density: Only 40% the weight of steel, enabling lightweight design and reduced inertia.

• Self-Lubricating: Low friction coefficient against metals, ideal for limited-lubrication conditions.

Applications

Ideal for critical components in extreme environments:

• Mechanical Components: High-performance bearing balls, rollers, cutting tools.

• Sealing Systems: Mechanical seal rings, pump seals for corrosive/abrasive environments.

• Industrial Wear Parts: Sandblasting nozzles, conveyor slides, wear-resistant liners.

• High-Temperature Components: Crucibles, thermocouple tubes, turbine blades.

• Semiconductor Manufacturing: Wafer handling arms, vacuum chucks, precision pins.

Technical Specifications

Manufacturing Process

Key steps: Powder Preparation → Forming (Dry Pressing/CIP/Injection Molding) → Sintering (Pressureless/Gas Pressure) → Precision Machining (Grinding/Lapping/Polishing) → Non-Destructive Testing → Final Inspection & Packaging.

Usage Guidelines

1. Installation: Avoid impact loading; despite high strength, it is a brittle material.

2. Pairing: Use softer metals as counterfaces to minimize ceramic wear.

Support & Services

• 12-month quality warranty from shipment date.

• Custom technical consulting and design services available.

• Non-standard customization supported for specific applications.

FAQ

• Q: How does silicon nitride compare to zirconia in wear resistance?
  A: Si₃N₄ excels in high-temperature, dry, or high-speed conditions due to its superior thermal and chemical stability.

• Q: Can complex shapes be manufactured?
  A: Yes, via Ceramic Injection Molding (CIM) for near-net-shape parts, finished with precision machining.

• Q: What are its limitations?
  A: Primary limitations are brittleness (notch sensitivity) and higher cost compared to metals.

We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.

Deyu Precision Ceramics Technology Co., Ltd. has many years of experience in producing special precision ceramics, and has the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics. At present, the company has production and processing equipment such as dry press, isostatic press, experimental furnace, flat kiln, machining center, surface grinder, universal internal and external grinder, centerless grinder and laser cutting machine, as well as complete high-precision testing equipment such as high-precision projector, three-dimensional tester, metallographic microscope, hardness tester and densitometer.

With advanced production technology and complete production facilities, the company is one of the few domestic enterprises that can produce special precision ceramic structural parts and functional parts with machining accuracy less than 2 microns, and has strong core competitiveness in the same industry in China.

Advantages of the company: 1. National new technology enterprises; 2. The company has a municipal R&D center; 3. Cooperation with domestic key universities and research institutes; 4. Design, molding, sintering and precision processing; 5. The products cover alumina, zirconia, silicon nitride, silicon carbide and other precision ceramics; 6. Precision plus technology.

The company has always been standing in the position of customers to solve problems, focusing on the principle of quality and delivery time, adhering to the business philosophy of "integrity, innovation and reassurance", and sincerely looking forward to cooperating with you.