99% alumina ceramic rod

Alumina ceramic rods are a type of high-performance ceramic material primarily composed of aluminum oxide (Al₂O₃), belonging to the category of engineering ceramics. Its main characteristics include:

1. Main component: Aluminum oxide (Al₂O₃), with a purity typically ranging from 75% to 99.9%. Higher purity results in superior performance.

2. Crystal structure: The main crystalline phase is the high-temperature stable α-Al₂O₃ (corundum structure), which gives the material high hardness and corrosion resistance.

3. Preparation process: High-purity alumina raw material is obtained by chemically treating bauxite raw materials to remove oxides such as silicon, iron, and titanium.

Physical and Chemical Properties

1. Physical properties:

Hardness: Mohs hardness 9, second only to diamond.

Melting point: 2054℃.

Density: 3.65-3.95 g/cm³.

Coefficient of thermal expansion: Low, similar to metals.

Insulation performance: Can withstand voltages above 800V per millimeter of thickness.

Thermal conductivity: 15.9-31.4 W/m·K (25-300℃).

2. Chemical Properties：

• Excellent chemical stability and resistance to acid and alkali corrosion.

• Does not readily react with common gases such as oxygen and nitrogen at room temperature.

• Exhibits amphoteric properties, reacting with both strong acids and strong bases.

3. Common specifications for alumina ceramic rods include:

• Diameter range: 3mm to 280mm, common sizes include Φ3.0mm, Φ4mm, etc.

• Length: Customizable, common lengths include 40mm, 80mm, etc.

Main Application Areas

Thanks to their excellent properties, alumina ceramic rods have a wide range of applications in various fields:

• Electronics industry: Integrated circuit substrates, high-frequency insulating materials, and components for semiconductor processing equipment.

• Mechanical industry: Ceramic bearings, seals, wear-resistant components, and robotic arms.

• Chemical and pharmaceutical industries: Corrosion-resistant pipe linings and reaction vessels.

• Aerospace: Vacuum switch tube casings, sealing rings, and other components.

• Medical field: Artificial joints, dental restoration materials, and orthopedic implants.

• High-end curling iron coatings.

• Heating elements in household heating equipment.

Supports custom specifications.