How to choose a bell jar furnace?

When choosing a bell jar furnace, multiple factors need to be considered to ensure that the selected equipment can meet actual needs and process requirements. Here are some key selection points:
1. Temperature range and heating performance
Temperature range: First, determine the required maximum temperature and the temperature range of the process. The temperature range of a bell jar furnace is generally between 500 ℃ and 1650 ℃, and the temperature range may vary for different models and brands of furnaces. When selecting, it is necessary to determine the appropriate temperature range based on the actual process requirements.
Heating speed: The faster the heating speed, the higher the production efficiency, but too fast a heating speed may cause material deformation or cracking. Therefore, when selecting, it is necessary to combine material characteristics and process requirements to choose an appropriate heating speed.
2. Temperature uniformity
The temperature uniformity inside the bell jar furnace is crucial for ensuring product quality. When selecting, it is necessary to consider the layout of heating elements in the furnace, the performance of insulation materials, and the influence of furnace size and shape on temperature uniformity. A bell jar furnace with good temperature uniformity can reduce the risk of uneven thermal stress and material deformation.
3. Furnace structure and materials
Furnace size: Determine the appropriate size of the furnace based on the size and quantity of the materials to be processed. A furnace that is too large or too small can lead to energy waste or low production efficiency.
Furnace material: The furnace material should have good high temperature resistance and thermal shock resistance. Common furnace materials include ceramic fibers, alumina hollow spheres, etc. When selecting, it is necessary to consider the high temperature resistance limit, thermal shock resistance, and service life of the material.
4. Control system and safety performance
Control system: Modern bell jar furnaces are usually equipped with advanced control systems that can achieve precise temperature control and switch between multiple heating modes. When choosing, it is necessary to consider the stability and usability of the control system, as well as whether it has safety protection functions such as over temperature alarm and automatic power-off.
Safety performance: The bell jar furnace belongs to high-temperature equipment and has a certain degree of danger when used. Therefore, when choosing, attention should be paid to the safety performance of the equipment, such as whether the furnace body locking device, lifting stroke protection switch and other safety devices are complete and effective.
5. Energy consumption and operating costs
The energy consumption of a bell jar furnace is relatively high, and as the usage time increases, the performance of the furnace materials and heating elements will gradually decrease, leading to an increase in energy consumption. Therefore, when choosing, it is necessary to comprehensively consider the energy consumption and operating costs of the equipment, and choose products with high energy efficiency and low maintenance costs.
6. Brand and after-sales service
Choosing a well-known brand of bell jar furnace can ensure the quality of the product and the reliability of after-sales service. Famous brands usually have a comprehensive product system and after-sales service network, which can provide timely technical support and maintenance services to users.
In summary, when choosing a bell jar furnace, it is necessary to comprehensively consider multiple factors such as temperature range and heating performance, temperature uniformity, furnace structure and materials, control system and safety performance, energy consumption and operating costs, as well as brand and after-sales service. It is recommended to conduct sufficient market research and comparative analysis before making a choice, in order to select the bell jar furnace that best suits your needs and process requirements.