Alumina Ceramic Columns & Insulation Columns High-strength Ceramic Support Columns

Alumina Ceramic Columns and Insulation Columns High-strength Ceramic Support Columns

Material: Aluminum Oxide, Alumina, 95%-99.9% Al₂O₃

Sizes：Min-OD: 0.02mm; Max-length: 500mm

Customized: Can be custom for special sizes and shapes

Delivery Times：2 -25 days(depends on the structure and quantity)

Features：High hardness, Wear resistance, High temperature insulation, High dielectric strength, High mechanical strength.

Fracture Toughness (MPa·m¹/²): 3.8-4.4
Refractoriness: 1500-1750℃
Density: 3.7-3.95g/cm3
Flexural Strength (MPa): 300-375
Thermal Conductivity: 25-30W/M.K

Transport Package: Cartons, Wooden Box

Shipment: by sea by air by courier by post etc.

Product Description

Alumina ceramic columns are a key foundational component widely used in numerous industrial fields. Essentially, they are cylindrical structural members made of alumina ceramic, leveraging its exceptional properties.

When selecting or designing alumina ceramic columns, the following factors must be considered:

1. Alumina Purity:

General industrial applications (insulation, support): 95% alumina generally offers the best cost-effectiveness.
For high-temperature, high-purity applications (semiconductors, vacuum): 99% or higher purity alumina is essential to prevent contamination.

2. Size and Shape:

Diameter and Height: Determine based on load-bearing capacity and stability calculations. A high slenderness ratio (height/diameter) can reduce bending strength.
End Face Treatment: Are chamfers, drilling, tapping, or metallization required? Metallized end faces can be easily welded to a metal baseplate for a more secure installation.

3. Mechanical Performance Considerations:

Load-bearing capacity: Compressive strength is the primary consideration.
Bending Resistance: Ceramics are highly brittle, and their bending strength is much lower than their compressive strength. Therefore, the design should minimize the application of lateral forces or bending moments.
Installation Method: Avoid hard impacts or excessive preload. It is best to secure with flexible gaskets or clamps to prevent stress concentration and cracking.

4. Environmental Factors:

Operating Temperature: Determines whether thermal shock resistance design is necessary.
Chemical Environment: Confirm whether the alumina ceramic can withstand the chemical media encountered on site.

Performance Advantages

Core Features of Alumina Ceramic Columns:
1. High Mechanical Strength and Hardness:

Its extremely high compressive strength (>2000 MPa) makes it ideal for load-bearing support components.
Its high Rockwell hardness (HRA 80-90) provides excellent wear resistance, making it resistant to minor impacts and scratches.

2. Excellent Electrical Insulation:

It exhibits extremely high resistivity and dielectric strength at both room and elevated temperatures, making it an ideal high-voltage insulation material.

3. High-Temperature Resistance:

It can operate for extended periods at temperatures up to 1600°C, exhibiting excellent thermal stability and resistance to deformation and oxidation.

4. Corrosion Resistance:

It offers excellent resistance to most acids, alkalis, and organic solvents, making it suitable for use in harsh chemical environments.

5. Chemical Stability:

It is non-volatile and non-polluting, allowing it to be used in high-purity or vacuum environments.

Application Areas

Due to these properties, alumina ceramic columns play an indispensable role in the following fields:

1. Electronics and Electrical Industry

High-voltage insulators: Used in high-voltage switchgear, power transmission and transformation equipment, and power supplies, they provide mechanical support and electrical insulation for live parts, ensuring safe distances.
Circuit board support columns: Used to support and secure circuit boards in electronic equipment, especially in high-frequency circuits, their low dielectric loss properties surpass those of plastic supports.
Vacuum Equipment Insulation Columns: Used in equipment such as vacuum circuit breakers and particle accelerators, providing reliable insulation in vacuum environments.

2. Semiconductor Manufacturing Industry

Wafer Transport and Support: Used to support and secure silicon wafer boats in diffusion furnaces and CVD (chemical vapor deposition) equipment. High purity is required to prevent metal contamination.
Internal Structural Components for Process Equipment: Serving as support frames, baffle supports, and other components within furnace tubes, they must withstand high temperatures and corrosive process atmospheres.

3. High-Temperature Industry

Kilns and Heat Treatment Equipment: Serves as load-bearing supports in high-temperature furnaces, supports for furnace bricks, and supports for internal components, enduring high temperatures and workpiece weights for extended periods.
Experimental Equipment: Serves as support legs for crucibles and firing boats in laboratory tube furnaces and muffle furnaces.

4. Precision Machinery and Measurement

Precision Equipment Supports: Serves as support legs for sensors and lenses in coordinate measuring machines (CMMs), optical platforms, laser equipment, and other applications. Its high rigidity and low coefficient of thermal expansion ensure equipment accuracy and stability.
Wear-Resistant Guide Columns: Serves as guide bushings or guide rail supports in equipment that must avoid particle contamination from metal friction, such as semiconductor and food processing equipment.

5. Other Industries

Chemical Equipment: Serves as support legs or internal components for containers or equipment in corrosive environments.
Research Equipment: Serves as support legs or internal components for various physical and chemical experimental devices, meeting the specific requirements of insulation, temperature resistance, and corrosion resistance.

Our core products including electronic ceramics, structure ceramics, functional ceramics,etc.,

Hunan Guoci New Material Technology Co., Ltd.

Address: No. 315, Zhaiziling, Qingyun North Road, Liling City, Hunan Province, 412200‌, China
Whatsapp: +86 181 0845 7259
E-mail: Marketing@guociceramic.com

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