Silicon Nitride (Si₃N₄) Ceramic Plates

Typical Properties

These values are representative rather than guaranteed. Final properties depend on the silicon nitride grade, additives, manufacturing process, component geometry, and test method.

Silicon Nitride (Si₃N₄) Ceramic Plates

TecCera supplies precision silicon nitride ceramic plates for demanding mechanical, thermal, semiconductor, and industrial applications. Silicon nitride is a high-performance non-oxide engineering ceramic offering an excellent combination of mechanical strength, fracture toughness, wear resistance, low thermal expansion, and thermal-shock resistance.

Custom dimensions, thicknesses, tolerances, holes, slots, profiles, and surface finishes are available according to customer drawings. Material grade and manufacturing process are selected based on the required mechanical properties, thermal conductivity, operating atmosphere, and application.

Key Features

• High flexural strength and fracture toughness
• Excellent resistance to thermal shock
• Low coefficient of thermal expansion
• Good strength retention at elevated temperatures
• High hardness and resistance to abrasive wear
• Lower density than many engineering metals
• Good corrosion resistance in many industrial environments
• Precision grinding, lapping, and polishing available
• Custom geometries and dimensional tolerances

Typical Applications

Industrial and Mechanical Equipment

• Wear-resistant plates and liners
• Structural support plates
• Guide and positioning components
• Sealing and sliding components
• High-load mechanical fixtures

High-Temperature Equipment

• Furnace support and positioning plates
• Thermal-processing fixtures
• High-temperature structural components
• Components exposed to rapid temperature changes

Semiconductor Equipment

• Wafer-handling fixtures
• Positioning and support plates
• Thermally stable equipment components
• Precision insulating and structural parts

Power Electronics

Specialized high-thermal-conductivity silicon nitride substrates can be used in power modules, including IGBT and MOSFET applications. These substrate grades require separately controlled thermal conductivity, dielectric performance, surface quality, thickness, and metallization compatibility.

Generic structural silicon nitride plates should not automatically be specified as power-electronics substrates.

Related Silicon Nitride Products

• Silicon nitride substrates
• Bearing balls and rollers
• Shafts, plungers, and valve components
• Nozzles and wear-resistant components
• Custom silicon nitride structural parts

Frequently Asked Questions

1. How does silicon nitride compare with alumina in thermal-shock resistance?

Silicon nitride generally offers better thermal-shock resistance than alumina because of its lower thermal expansion, higher fracture toughness, and favorable strength-to-modulus relationship.

A single ΔT value should not be used for every component. Actual thermal-shock performance depends on material grade, thickness, geometry, surface condition, heating rate, cooling medium, and test method.

2. What is the maximum service temperature of a silicon nitride plate?

The allowable service temperature depends on the silicon nitride grade, mechanical load, atmosphere, and required service life.

Many dense silicon nitride grades can operate at approximately 1000–1200°C in air, while higher temperatures may be possible in controlled non-oxidizing atmospheres. The final temperature limit must be confirmed for the specific material grade and operating conditions.

3. Is silicon nitride suitable for corrosive or high-wear environments?

Silicon nitride provides excellent wear resistance and good chemical stability in many industrial environments. However, it should not be described as resistant to every acid, alkali, or molten metal.

Compatibility must be evaluated for hydrofluoric acid, concentrated alkalis, molten salts, molten metals, and high-temperature reactive media.

4. Can silicon nitride plates be customized?

Yes. Available customization includes:

• Length, width, and thickness
• Holes, slots, steps, and custom profiles
• Dimensional and geometric tolerances
• Precision grinding and lapping
• Polished surfaces
• Material grades selected for mechanical or thermal requirements

Please provide a technical drawing, operating temperature, atmosphere, mechanical load, surface-finish requirement, and order quantity for evaluation and quotation.

Contact TecCera for custom silicon nitride ceramic plates, technical review, material selection, samples, and quotation.