99% Alumina Ceramic Rectangular Trays and 95% Alumina Ceramic Caps and Ceramic Carrier Plates

Alumina ceramic trays are flat or structured carriers made of industrial alumina (Al₂O₃) ceramic. The alumina content typically ranges from 92% to 99.5%, with varying purity, size, and structural design depending on the application.

Alumina ceramic trays are not containers, but rather functional platforms for carrying, sintering, transferring, or handling other materials. They are an indispensable carrier tool for high-temperature and specialized industrial environments, and their value far exceeds that of a simple "plate."

Alumina ceramic trays come in various designs depending on the intended use:

• Flat: The simplest form is a flat ceramic plate.
• Framed: Features low edges around the edges to prevent small workpieces or powder from slipping.
• Post: The plate is designed with multiple round or square posts for inserting components such as MLCCs. This ensures even heating on all sides, prevents sticking to the plate, and maximizes furnace space utilization.
• Hollow: Designed with various holes to reduce weight and promote uniform hot air flow.

Material Purity Options:

• 95% - 96% Alumina: Suitable for most high-temperature loads and heat treatment applications, offering a cost-effective solution.
• 99% - 99.5% Alumina: Used in high-end applications such as electronic ceramic sintering, offering exceptional purity and preventing product contamination.

The value of alumina ceramic trays stems from their exceptional material properties, perfectly matching the demands of high-temperature industries:

1. Excellent High-Temperature Resistance

• Performance: Able to withstand long-term operation at temperatures of 1500°C to 1600°C without softening, deformation, or oxidation.
• Value: This core advantage allows them to be used directly in high-temperature furnaces as setters.

2. High Mechanical Strength

• Performance: Extremely high compressive strength (>2000 MPa) and good flexural strength.
• Value: Able to support heavy workpieces (such as numerous electronic components and ceramic blanks) and remain flat at high temperatures without collapsing or bending.

3. Excellent Chemical Resistance

• Performance: Highly resistant to most acids, alkalis, molten metals, and chemical atmospheres.
• Value: Long service life in corrosive environments without contaminating workpieces.

4. High Hardness and Wear Resistance

• Performance: High hardness (Mohs hardness 9) and excellent wear resistance.
• Value: Withstands repeated handling and scraping of workpieces, resists scratches and dust generation.

5. Excellent flatness and dimensional stability

• Performance: Low thermal expansion coefficient, resists deformation under heat.
• Value: Maintains extremely high flatness during high-temperature sintering, ensuring consistent sintering quality and preventing deformation of the product.

6. Excellent insulation

• Performance: An excellent electrical insulator.
• Value: Can be used for sintering electronic components without causing short circuits.

Far from being a passive carrier, alumina ceramic trays are key tools that actively participate in and ensure the quality of high-temperature processes. Their exceptional high-temperature resistance, high flatness, and high stability ensure sintering consistency and yield for products (especially high-value electronic components) placed on them.

Alumina ceramic trays are the "unsung heroes" of high-end manufacturing processes. Their main applications include:

1. Electronic Component Sintering

• Applications: Sintering electronic components such as MLCCs (Multi-Layer Ceramic Capacitors), inductors, resistors, and magnetic materials.
• Requirements: High flatness, high purity (above 99%), high-temperature resistance, and non-reactive with the product. This is one of its most advanced applications.

2. Powder Metallurgy

• Applications: Carrying metal powder compacts for high-temperature sintering.
• Requirements: Strong high-temperature bearing capacity and low adhesion to metal workpieces.

3. High-Temperature Heat Treatment

• Applications: Used in processes such as brazing, annealing, and tempering, carrying workpieces into atmosphere or vacuum furnaces.
• Requirements: High-temperature resistance and excellent stability.

4. Solar Photovoltaic and Lithium Battery Industries

• Applications: Sintering and conveying solar silicon wafers and lithium battery positive and negative electrode materials.
• Requirements: High cleanliness, corrosion resistance, and long service life.

5. Laboratory and Research

• Applications: Setters and crucible supports in small tube furnaces and muffle furnaces.
• Requirements: Precise dimensions and stable performance.