Alumina Ceramic Screw Fasteners

2 year ago

93 0 

Shaanxi Puwei Electronic Technology Co., Ltd

2 year

Product details

Alumina Ceramic Screw Fasteners

Product Overview

Puwei's Alumina Ceramic Screw Fasteners are engineered to outperform traditional metal fasteners in the most demanding applications. Manufactured from high-purity aluminum oxide (Al₂O₃), they combine exceptional temperature resistance, outstanding chemical inertness, excellent electrical insulation, and high mechanical strength in a lightweight, non-magnetic package. These high-performance CERAMIC COMPONENTS are the ideal solution for industries where extreme environments, corrosion, electrical isolation, or weight reduction are critical, including the assembly of sensitive Microelectronics and high-power systems.

Why Choose Puwei Alumina Ceramic Fasteners?

Extreme Temperature & Thermal Shock Resistance (Up to 1650°C): Maintain integrity in high-temperature furnaces and aerospace applications where metals fail.
Superior Corrosion & Chemical Resistance: Inert to most acids, alkalis, and solvents. Eliminates galvanic corrosion and contamination in chemical and semiconductor processing.
Excellent Electrical Insulation & Non-Magnetic Properties: Provides perfect electrical isolation, preventing eddy currents and short circuits. Essential for high-frequency modules, MRI equipment, and securing insulation elements.
High Hardness & Exceptional Wear Resistance: Hardness exceeding 80 HRA ensures minimal thread wear and long service life in abrasive or high-vibration environments.
Lightweight with High Strength-to-Weight Ratio: Significantly lighter than steel, aiding in weight reduction for aerospace and portable electronics.
Biocompatible & Chemically Inert: Suitable for medical and food-processing equipment where purity and non-toxicity are paramount.

Various sizes and types of Alumina Ceramic Screws, Bolts, and Nuts from Puwei

Close-up of precision-machined Alumina Ceramic Fastener threads and head

Technical Specifications

Material & Physical Properties

Material: High-Purity Al₂O₃ (96%, 99.5%, 99.8%). Density: 3.7 – 3.9 g/cm³. Water Absorption: 0%.

Mechanical Properties

Hardness (HRA): 80 – 90 HRA. Flexural Strength: 300 – 400 MPa. Compressive Strength: >2000 MPa.

Thermal & Electrical Properties

Max Continuous Use Temperature: 1500°C – 1650°C. Thermal Conductivity: 20 – 30 W/(m·K). Volume Resistivity: >10¹⁴ Ω·cm. Dielectric Strength: >15 kV/mm.

Product Features & Competitive Advantages

1. Engineered for Harsh & Demanding Environments

Unmatched resistance to extreme heat, corrosive chemicals, and thermal cycling, ensuring reliable performance where metals degrade.

2. Critical Electrical Isolation for Sensitive Electronics

Ultra-high electrical resistivity and dielectric strength make them essential for fastening components in Power Devices and High-Frequency Modules, preventing leakage and interference.

3. Precision Manufacturing for Reliable Assembly

Produced with tight tolerances and high surface quality using advanced diamond grinding, ensuring consistent fit and function, even when used with other CERAMIC COMPONENTS like Alumina Ceramic Substrate (Al2O3).

4. Long-Term Reliability & Reduced Maintenance

Exceptional hardness and wear resistance lead to a dramatically longer service life than metal fasteners, reducing downtime and total cost of ownership.

Installation & Handling Guidelines

Design & Preparation: Account for ceramic's high compressive strength but lower tensile strength. Ensure mating surfaces are flat and aligned. Use recommended torque values, which are typically lower than for steel.
Inspection & Thread Care: Inspect fasteners for defects. Clean and deburr mating threads. Apply a compatible anti-seize lubricant to reduce friction.
Proper Tooling & Tightening: Use tools with soft jaws. Apply torque steadily and evenly with a torque wrench. Never use impact drivers or over-tighten.
Final Check: Avoid re-torquing after initial installation to prevent stress cracking.

Primary Application Scenarios

Semiconductor & Vacuum Equipment

Securing components in wafer processing and vacuum chambers where high purity, non-contamination, and non-outgassing are critical.

High-Temperature Industrial Furnaces

Assembling furnace elements and insulation in environments where metal fasteners would oxidize or lose strength.

Electrical & Power Electronics

Providing secure, electrically insulating fastening for busbars, heatsinks, and components in Power Devices and Thermoelectric Modules, eliminating short-circuit risks.

Chemical Processing & Aerospace

Used in corrosive fluid handling and in aerospace applications where lightweight, non-magnetic, and high-temperature performance are required.

Business Value & ROI for B2B Buyers

Solve Extreme Application Challenges: Enable designs that operate in environments where metal fasteners are unsuitable.
Enhance System Reliability & Safety: Prevent electrical failures, galvanic corrosion, and magnetic interference in sensitive systems.
Reduce Lifetime Costs: Longer service life and reduced maintenance lower the total cost of ownership compared to frequent metal fastener replacement.
Enable Innovation: Allow engineers to design next-generation equipment for semiconductor, energy, and aerospace industries with confidence.

Customization Capabilities

We provide tailored fastener solutions to meet your specific requirements:

Full Range of Types: Machine screws, socket head cap screws, set screws, nuts, washers, and studs.
Precision Dimensions: Custom diameters (M2 to M20+), lengths, thread pitches, and head styles.
Material Grade Selection: 96% Al₂O₃ (cost-effective), 99.5% (superior performance), or 99.8% (ultra-high purity).
Tolerances & Finishes: Manufactured to ISO/DIN standards with optional tighter tolerances and special surface finishes.

Production Process & Quality Assurance

Manufactured under a controlled ISO 9001:2015 process: 1) Powder Preparation of high-purity alumina. 2) Precision Forming via isostatic pressing. 3) High-Temperature Sintering above 1600°C. 4) Precision Diamond Grinding on CNC equipment for threads and dimensions. 5) Rigorous Inspection including 100% visual and dimensional checks.

Certifications & Compliance

Our manufacturing is governed by an ISO 9001:2015 certified quality management system. Materials are compliant with RoHS and REACH directives, ensuring global acceptance and safety.