Introducing our High-temperature Graphite Vacuum Furnace, a cutting-edge piece of equipment designed for the production of graphite electrodes. This furnace is specifically engineered to ensure high purity and excellent electrical conductivity in the final product.
Crafted with precision and expertise, our High-temperature Graphite Vacuum Furnace is equipped with advanced technology to create a controlled environment for the production process. The vacuum feature eliminates impurities and contaminants, resulting in a superior quality graphite electrode.
With a focus on efficiency and reliability, this furnace is built to withstand high temperatures and rigorous production demands. Its durable construction and innovative design make it a valuable asset for any manufacturing operation seeking top-notch performance and consistent results.
Invest in our High-temperature Graphite Vacuum Furnace and experience the difference in quality and productivity it can bring to your production process. Trust in our expertise and commitment to excellence to take your graphite electrode production to the next level.
Product Description:
The graphite vacuum furnace is specifically designed for high-temperature treatment of graphite and its composite materials. Operating in a vacuum environment, it effectively minimizes oxidation and contamination, thereby enhancing product quality.
Product Features:
High Temperature Capability: Typically reaches temperatures above 2000°C, suitable for the sintering, annealing, and melting of graphite.
Vacuum Control: Equipped with precise vacuum control, allowing adjustment to various vacuum levels to ensure a pure atmosphere during processing.
Graphite Heating Elements: Usually employs graphite heating elements within the furnace, offering excellent thermal conductivity and high-temperature resistance for uniform heating.
Versatility: In addition to processing graphite, the graphite vacuum furnace can also be used for thermal treatment of other materials, such as ceramics and metals.
Environmentally Friendly and Safe: Working in a vacuum environment effectively prevents the release of harmful gases, enhancing operational safety.
Purchase Information:
If you are interested in our vacuum furnace, please contact us for more information and pricing.
Phone: +86 18516380382
Email: Jimmy@cysitech.com
Contact Person: Jimmy Hao
WeChat: +86 18516380382
Technical Parameters:
Product Name | Graphite Vacuum Furnace |
Model | CY-VF-GH |
Capacity | Options from 500g to 5kg |
Furnace Structure | Carbon steel shell, double-layer structure |
Heating Element | Graphite plate |
Working Temperature | Max. 1700°C; continuous working temperature ≤ 1300°C |
Heating Rate | ≤20°C/min, recommended at 10°C/min |
Precision | ±1℃ |
Thermocouple | Type B |
Temperature Uniformity | ±5℃ |
Control Method | Screen control (stores 16 temperature curves), 16-segment programmable controller, PID automatic controller, thermocouple disconnection protection, and over-temperature automatic protection alarm |
Atmospheric Control | Fine-tuning valve for gas intake, capable of introducing inert gases like Ar or N2 according to process requirements |
Vacuum System | Low vacuum: Dual-stage rotary vane vacuum pump, 3Pa High vacuum: Mechanical pump + diffusion pump/molecular pump, -3Pa |
Cooling System | Water Chiller |
Power Supply Voltage | Single-phase 220V, 50/60Hz; three-phase 380V, 50/60Hz |
Main Components:
Component Name | Description |
Main Unit | Set process parameters, where physical changes of the sample occur |
Vacuum System | Chamber obtains vacuum |
Gas Control System | For filling with inert gases |
Water Chiller | For cooling the chamber |
Accessories | Gloves, hex keys, heating rods, pliers |
User Manual | Standard configuration |
Application Fields:
Metallurgical Industry: Used in the production of graphite electrodes to ensure high purity and excellent electrical conductivity.
Aerospace: Used for processing aerospace components and materials to ensure their performance in extreme environments.
Electronics Industry: Used for the sintering and processing of semiconductor materials to meet high purity and performance requirements.
Nuclear Energy: Used in the processing of nuclear reactor components and graphite materials to ensure radiation resistance and stability.
Ceramic Manufacturing: Used for the sintering of high-performance ceramic materials to enhance their strength and wear resistance.
Functional Materials: Used in the development and preparation of high-performance composite materials and functional materials, such as conductive and high-temperature resistant materials.
Pharmaceutical and Chemical Industries: Used for thermal treatment in specific chemical reactions to improve reaction efficiency and product quality.
Application Case: "Sintering Silicon Nitride Using Graphite Vacuum Furnace"
Process Steps:
1. Raw Material Preparation:
Choose high-purity silicon nitride powder, typically adding a small amount of flux (such as alumina) to improve sintering results.
2. Mixing:
Mix the silicon nitride powder with the flux in proportion to ensure uniform dispersion. This can be done using a ball mill or other mixing equipment.
3. Molding:
Place the mixed powder into a mold and shape it into the desired form using pressure forming (such as cold pressing).
4. Drying:
Dry the formed body to remove moisture, usually at low temperatures (around 100°C).
5. Loading the Furnace:
Place the dried body into a graphite crucible and then put the crucible into the vacuum atmosphere furnace.
6. Vacuum Pumping:
Start the vacuum system to remove air from the furnace, achieving the desired vacuum level (usually below 10⁻³ mbar).
7. Atmospheric Control:
Introduce inert gas (such as argon) into the furnace to protect the material and prevent oxidation.
8. Heating:
Activate the graphite heating element and slowly raise the temperature to the sintering temperature (typically between 1600°C and 1800°C), maintaining a constant temperature for a period (several hours) to ensure sufficient sintering of silicon nitride.
9. Cooling:
Gradually cool down after sintering to avoid cracks due to sudden temperature changes.
10. Product Extraction:
After cooling to room temperature, open the furnace door and carefully remove the sintered silicon nitride ceramic piece.
11. Post-Processing:
Perform necessary post-processing on the product, such as machining or surface treatment, to achieve the required dimensions and surface quality.
Precautions:
Control the rates of heating and cooling to avoid thermal shock that may lead to cracking of the body.
Ensure the accuracy of atmosphere control to prevent oxidation or other reactions of materials at high temperatures.
Common Issues During the Use of Vacuum Furnace
Oxidation or Contamination:
Materials may still be affected by trace oxygen, leading to oxidation even in a vacuum state.
Temperature Non-Uniformity:
Uneven temperature distribution inside the furnace may cause uneven sintering or damage to materials.
Vacuum Leaks:
Vacuum systems may develop leaks, affecting atmospheric stability and processing effectiveness.
Cracking of Samples:
Rapid heating or cooling may lead to thermal shock and cracking.
Improper Atmospheric Control:
Insufficient concentration of inert gas in the atmosphere may impact sintering quality.
Precautions During the Use of Vacuum Furnace
Atmosphere Monitoring:
Regularly check the atmosphere and vacuum levels in the furnace to ensure stability.
Heating and Cooling Rates:
Control the rates of heating and cooling, generally recommended to change slowly to reduce thermal stress.
Material Selection:
Ensure that the materials used are suitable for high-temperature and vacuum environments to avoid incompatible chemical reactions.
Regular Maintenance:
Periodically inspect and maintain the furnace body, vacuum system, and heating elements to ensure normal operation.
Safety Protection:
Wear appropriate personal protective equipment during operation to ensure safety.
By focusing on these common issues and precautions, the efficiency of the vacuum furnace and the quality of material processing can be improved.
