Wear-Resistant Gas Pressure Sintered GPS Bar Silicon Nitride Ceramic Shaft

• Customization: Available
• Application: Electronics, Refractory, Structure Ceramic, Industrial Ceramic
• Type: Ceramic Rod
• Model NO.: HBF-C002
• Name: Silicon Nitride Rod
• Color: Black Grey
• Certification: ISO9001
• Name1: Silicon Nitride Bar
• Name3: Ceramic Bar
• Name2: GPS Silicon Nitride
• Name4: GPS Silicon Nitride Ceramic
• Name5: GPS Silicon Nitride Ceramic Rod
• Name6: Silicon Nitride Ceramic Bar
• Density: >3.2g/Cm³
• Modulus of Elasticity: 290 Gpa
• Rockwell Hardness: Hra90
• Compressive Strength: 2500 MPa
• Feature: High Hardness, High Strength, High Temperacture
• Maximum Use Temperature: 1200℃
• Transport Package: Export Carton
• Specification: customized
• Trademark: HIGHBORN
• Origin: Jiangsu, China
• Production Capacity: 50000PCS Per Month
• Package Size: 15.00cm * 10.00cm * 15.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

silicon nitride bar, silicon nitride shaft

Silicon Nitride (Si3N4) ceramic rod is a high-performance advanced structural ceramic manufactured by GPSN pressureless sintering, HIP hot isostatic pressing and RBSN reaction bonded sintering. With ultra-high mechanical strength, excellent thermal stability, outstanding wear & corrosion resistance and superior electrical insulation, it is widely used in extreme high-temperature, heavy-load, friction and corrosive industrial environments where metal, alumina and zirconia cannot meet long-term service requirements.

silicon nitride ceramic rod

Density: ≥3.2 g/cm³, apparent porosity less than  0.1%, fully dense structure
Mechanical Properties
Vickers Hardness: 15–18 GPa (1500–1800 HV)
Flexural Strength: 600–800 MPa (hot-pressed grade up to 1000 MPa)
Compressive Strength: 2200–2500 MPa
Fracture Toughness: ≥6.0 MPa·m¹/ ², strong anti-cracking ability

Chemical & Electrical Performance
Resist almost all inorganic acids, weak alkali and molten non-ferrous metals (Al, Sn, Pb, Zn), non-wetting with molten metal
Volume resistivity more than 10¹² Ω·cm, excellent high voltage insulation, breakdown strength 19 KV/mm
Oxidation resistance: Stable oxidation layer formed above 1300℃ to block deep oxidation

semiconductor silicon nitride fixture rod

Semiconductor & Electronics: Wafer transfer fixture pins, high-temperature insulating support rods, vacuum equipment structural parts (low outgassing in high vacuum)
Metallurgy & Foundry: Molten metal stirring rods, thermocouple protection sleeves, high-temperature furnace support
Automotive & Machinery: Ceramic piston rods, pump shafts, bearing rollers, wear-resistant punch pins

Q1: Can silicon nitride replace zirconia or alumina ceramic rods?

A: It depends on your working condition. Si3N4 has far better thermal shock resistance and high-temperature strength than zirconia and alumina, more suitable for frequent cold-hot cycling and over 800℃ continuous working scenarios.

We suggest you provide your operating temperature, load and medium for our professional material comparison suggestion.

Technical Specifications

(Custom configurations available upon request.)

Material name	Unit	SI3N4(G.P.S)
Volume densityg	g/cm3	3.2-3.3
Hardness	HRA	90-93
Bending strength	MPa	500-700
Air hole rate	%	<1
Thermal expansion coefficient	1×10-6/C0	3.5
Breaking tenacity	(MPa m1/2)	7
Thermal Conductivity	W/m·K	4

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FAQ

Q1: Can you provide exclusive customized solutions for special project demands? 
A1: Yes. In addition to conventional OEM and ODM customization, we can develop exclusive product structures, adjust technical parameters and optimize solutions according to special project standards, regional industry specifications and personalized buyer requirements, providing one-to-one customized technical support.
 
Q2: Do you support third-party factory inspection and product random testing? 
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Q3: How do you ensure on-time delivery for bulk orders? 
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Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.
 
Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.