Precision Machined Silicon Nitride Ceramics Slabs Polished Si3N4 Spacer Insulating Sheet

Precision Machined Silicon Nitride Ceramics Polished Si3N4 Spacer Insulating Sheet

Silicon Nitride Ceramic Spacer Sheet
Silicon nitrides (Si3N4) are a range of advanced engineering ceramics characterised by high strength, toughness and hardness and excellent chemical and thermal stability.
Silicon nitride is a very important engineering ceramic which is available in characteristics, include high strength, toughness and hardness, excellent wear resistance, corrosion resistance to many acids and alkalis and outstanding thermal shock resistance.

Silicon nitride ceramic spacers are high‑performance structural ceramic components made of high‑purity Si₃N₄ raw material. Produced by spray granulation, cold isostatic pressing / dry‑press forming, gas‑pressure sintering or hot isostatic pressing densification, and finished with precision grinding. Strict control over grain‑boundary phase content and sintered density eliminates internal micropores that may act as crack initiation sources. These spacers combine high toughness, high‑temperature stability, thermal shock resistance and electrical insulation, widely used for spacing, supporting, isolating and cushioning under harsh working conditions.

Key Features

• High mechanical strength and fracture toughness, anti‑cracking under cyclic load
• Excellent thermal shock resistance, resistant to rapid heating and cooling
• Reliable electrical insulation, low dielectric loss
• Good corrosion resistance against acid, alkali and molten non‑ferrous metals
• Low thermal expansion coefficient, stable dimension over wide temperature range
• High hardness and wear‑resistant, long service life

Si3N4 Ceramic Parts are a man made compound synthesized through several different chemical reaction methods. they are pressed and sintered by well developed methods to produce a ceramic with a unique set of outstanding properties. The material is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts with a striking appearance.

Manufactured from high‑purity ultrafine silicon nitride powder, the parts go through spray granulation, cold isostatic pressing or dry‑press forming, followed by densification via gas‑pressure sintering or hot isostatic pressing, and final precision grinding. The key lies in controlling grain‑boundary phase content and sintered density to prevent internal micropores from becoming crack initiation sources.

Main Applications

Ceramic sheets are widely used in power electronics, semiconductor packaging, heat dissipation, insulation and precision mechanical fields.

1. Power module substrates: Serve as insulating and heat-conducting base plates for IGBT, MOSFET and power semiconductor components.
2. Thermal management: High thermal conductivity ceramic sheets transfer heat quickly for high-power chips and LED devices.
3. Electrical insulation: Excellent dielectric property prevents electric breakdown under high voltage.
4. Precision machinery: Wear-resistant ceramic sheets act as locating plates, spacers and protective liners.
5. Sensor & high-temperature equipment: Stable performance at high temperature, resistant to corrosion and thermal shock.

Silicon Nitride Material Technical Sheet

Features:

● High Hardness
Silicon nitride exhibits extremely high hardness, making it suitable for fields such as wear-resistant and cutting tools.

● Excellent Wear Resistance
Silicon nitride ceramic exhibits outstanding wear resistance, making it suitable for applications in high-wear environments.

● Superior Insulating Performance
Silicon nitride ceramic possesses excellent electrical insulation properties and chemical stability, making it widely used in the electronics and semiconductor industries.

● High Temperature Stability
It can maintain stability in high-temperature environments, making it suitable for applications like high-temperature heaters and furnaces.

Applications:
Rotating ball bearings and rollers bearings
Cutting tools
Engine components: valves, rocker arm pads, seal faces
Induction heating coil supports
Turbine blades, vanes, buckets
Welding and brazing jigs
Heating element components
Crucibles
Metal tube forming rolls and dies
TIG / Plasma welding nozzles
Weld positioners
Precision shafts and axles in high-wear environments
Thermocouple sheaths and tubes
Semiconductor process equipment

Norceramic New Materials supplies high-performance ceramic materials and precision components for research, prototyping, and industrial production. Our products includes pyrolytic and hot-pressed boron nitride, silicon carbide, alumina, zirconia, and other specialized ceramics, with standard products and custom solutions available for demanding applications.

With a deep understanding of material behavior in ceramic parts, Norceramic specializes in high-performance ceramics including Alumina, Zirconia, and ZTA, and more to deliver components that meet the most stringent mechanical and thermal requirements.

At Norceramic, we specialize in providing high-precision custom ceramic parts for the medical, electronics, optics, and semiconductor sectors. Through DFM optimization and full-process quality control, we ensure micron-level dimensional consistency for complex geometries during mass production.

From R&D prototypes to full-scale production, Norceramic New Materials delivers high-purity alumina, boron nitride, silicon carbide, and aluminum nitride ceramics tailored to your exact specifications. We work closely with trusted, ISO-certified manufacturers to ensure every batch meets rigorous quality standards—so you can focus on your application. Whether you need custom shapes, small quantities for research, or high-volume production for industrial use, Norceramic provides the technical expertise and supply chain reliability you expect.

Our mission is to support innovation by providing high-quality ceramic materials and solutions. We are committed to helping our customers drive innovation and achieve operational excellence. With a focus on both cutting-edge technology and traditional craftsmanship, Norceramic ensures that every ceramic product we deliver offers optimal performance, quality, and consistency.