High-purity Alumina Boat

Introduction

High-purity alumina boat is a specialized container for high-temperature experiments. Zylab High-purity alumina boats are made of 99% alumina ceramic, it exhibits extremely high temperature resistance, corrosion resistance, and abrasion resistance.

Manufacturing Process

1. Making the mold for the product.
2. Making the raw body of the crucible.
3. Putting the finished raw body into the kiln for firing.
4. Sorting and storing the crucibles after they pass the inspection.

Advantages

1. The product material is 99% alumina (Al2O3 > 99%), with high purity.
2. Adopting slip casting/pressing molding process.
3. Firing temperature is 1800°C, long-term use temperature ≤ 1600°C.
4. High temperature resistance and chemical corrosion resistance.

Applications

1. Sample Fusion and Roasting: The shape of alumina boat makes it suitable for holding solid, powder, or liquid samples for fusion or roasting at high temperatures.
2. Sample Ignition and Combustion Analysis: It can be used for sample ignition or combustion analysis.
3. High-Temperature Experiments: Including material research, thermogravimetric analysis, differential scanning calorimetry, etc.
4. Metal and Ceramic Melting: They withstand extremely high temperatures, providing a stable container for processing and alloying materials during melting.
5. Chemical Reactions: Alumina boats are also used for high-temperature chemical reactions.

Related Equipment

• Tube Furnaces
• Vacuum Furnace
• 1700.C Electric Furnace

Alumina Boat Usage Precautions

1. Before the first use, preheat the crucible in an oven at around 105°C for 120 minutes to remove moisture.
2. Do not directly heat the crucible with gasoline blowtorch, acetylene torch, or alcohol burner to avoid uneven heating and cracking of the product.
3. The heating or cooling rate should not be too fast. The temperature change below 1200°C should be <5°C/minute, and above 1200°C should be ≤4°C/minute. When cooling, it is recommended to control the temperature by powering off gradually. Cooling too fast during the initial cooling phase after turning off the power may cause the product to crack.
4. The distance between the product and the heating element (such as carbon tube, silicon molybdenum rod, or heating wire, etc.) should be >2cm.
5. The bottom of large crucibles should preferably not directly contact the bottom of the furnace. It is recommended to use alumina foot pads or other heat-resistant materials to lift the crucible, forming air convection to prolong the service life of the product.