Silicon Nitride Ceramics High-Temperature Resistant Material For Automotive Engine Components And Gas Turbine Parts

Silicon Nitride Ceramics High-Temperature Resistant Material For Automotive Engine Components And Gas Turbine Parts

Product Overview
This product is manufactured from high-performance silicon nitride (Si₃N₄) ceramic material, featuring a dark gray cylindrical structure with a precision-polished surface that is dense and uniform. Designed as a hollow tube open at both ends, it is available in two standard specifications (short and long) with an internal surface smoothness of Ra ≤ 0.2 μm. Leveraging the exceptional physical properties of silicon nitride ceramic, this tube maintains stable mechanical performance under harsh conditions such as high temperatures, corrosion, and wear, making it an ideal basic component for precision industrial equipment.

Primary Applications

• Insulating bushings and protective sleeves in high-temperature bearing systems

• Guide roller components in semiconductor wafer handling equipment

• Corrosive medium transfer pipelines in chemical processes

• Protective focusing lens sleeves for laser cutting machines

• Insulating protective housings for high-temperature sensors

Key Advantages

• Flexural strength ≥ 600 MPa, hardness HRA 92-94

• Temperature resistance up to 1300°C (in oxidizing atmosphere), thermal shock resistance ΔT ≥ 800°C

• Wear resistance 5-8 times greater than alumina ceramic

• Resistant to acid and alkali corrosion (except hydrofluoric acid)

• Low coefficient of thermal expansion (3.2 × 10⁻⁶/K), excellent dimensional stability

• Insulation resistance > 10¹⁴ Ω·cm

Specifications Table

Manufacturing Process
Raw material formulation → Spray drying → Cold isostatic pressing (CIP) → CNC machining → Gas pressure sintering → Internal & external cylindrical grinding → Ultrasonic testing → End face finishing → Dimensional screening → Vacuum packaging.

Usage Instructions

1. Use specific expanding tools for installation; avoid direct impact.

2. Recommended interference fit with metal parts: 0.02-0.05 mm.

3. Vertical installation is recommended when conveying media containing particles.

4. Regularly inspect the inner wall for wear (recommended interval: 2000 hours).

After-Sales Service

• 24-month extended warranty.

• Custom non-standard sizes supported (solution provided within 3 business days).

• Installation guidance videos available.

• Dedicated customer quality files maintained.

Frequently Asked Questions (FAQ)
Q: What is the maximum pressure it can withstand?
A: Short specifications withstand pressure ≥ 80 MPa, long specifications ≥ 50 MPa (requires calculation based on specific dimensions).

Q: Can secondary machining be performed?
A: Internal wall polishing, end chamfering, and other finishing processes are supported (process requirements must be provided).

Q: What are the advantages compared to zirconia tubes?
A: Higher heat resistance (by 400°C) and thermal conductivity (3 times greater), making it more suitable for high-temperature heat dissipation scenarios.

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.