High-Strength Silicon Nitride Ceramic Dark Gray Hollow Cylinder / Sleeve

High-Strength Silicon Nitride Ceramic Dark Gray Hollow Cylinder / Sleeve

Product Introduction

This product is a hollow cylindrical structural component made from high-performance silicon nitride ceramic. It features a dark gray appearance with a mirror-level surface finish achieved through precision machining. The through-hole design creates a uniform structure with consistent inner and outer diameters, with wall thickness uniformity controlled within ±0.1mm. This special structure combines the inherent high hardness and wear resistance of ceramic materials with the advantages of lightweight design, making it suitable for high-precision industrial applications.

Core Advantages

• Exceptional wear life: Hardness exceeding HRA 90, wear rate only 1/10 of bearing steel

• Extreme temperature stability: Maintains dimensional stability from -60°C to 1200°C

• Self-lubricating properties: Friction coefficient ≤0.15, requiring no additional lubricants

• Corrosion resistance: Withstands strong acid and alkali environments (except hydrofluoric acid)

• Lightweight design: Density of 3.25g/cm³, 40% lighter than equivalent specifications of tungsten carbide

Primary Applications

• High-speed bearing components: CNC machine tool electric spindle bearings, aerospace precision bearings

• Fluid handling systems: Chemical pump mechanical seal rings, corrosion-resistant输送 sleeves

• Semiconductor equipment: Wafer transfer guides, vacuum processing chamber insulation columns

• Measuring instruments: CMM guide sleeves, optical platform support columns

• Thermal processing equipment: Sintering furnace carrier rollers, heat treatment equipment positioning sleeves

Specifications Table

Manufacturing Process

High-purity silicon powder nitridation → Spray granulation → Cold isostatic pressing (200MPa) → Atmosphere-protected sintering (1800°C) → CNC internal/external cylindrical grinding → Ultrasonic flaw detection → Laser dimensional verification → Vacuum anti-static packaging

Usage Instructions

1. Ensure clean mating surfaces during installation, recommend using thermal assembly process (heating temperature ≤200°C)

2. Allow 0.02-0.05mm thermal expansion gap when fitting with metal components

3. Avoid contact with hydrofluoric acid; use temperature in strong alkaline environments should be <80°C

4. Storage environment humidity should be controlled below 40% RH to prevent caking

After-Sales Service

• Provide material composition test reports

• Support custom non-standard dimensions (minimum inner diameter from 0.5mm)

• Provide service life guarantee agreements for bulk purchases

• Professional technical team offers working condition adaptation solutions

FAQ

Q: What are the advantages compared to zirconia ceramic sleeves?
A: Silicon nitride maintains high mechanical strength above 800°C, with lower thermal conductivity, making it more suitable for applications with rapid temperature changes

Q: Can secondary machining be performed?
A: Supports precision machining like laser drilling/diamond grinding, but must be done after sintering is complete

Q: What is the maximum available length specification?
A: Conventional specifications ≤500mm, special processes can produce 1200mm ultra-long sleeves

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.