When choosing an electric heating tube furnace, multiple factors need to be considered comprehensively to ensure that the selected equipment can meet the actual needs of experiments or production. Let's take a look at the things to pay attention to below!

Pilot electric heating rotary tube furnace (click on the picture to view product details)

1. Temperature requirements for use
Clearly define the maximum temperature: Different experiments and production processes have vastly different temperature requirements. For example, drying experiments on some samples may only require 300-500 ℃, while melting high-performance metal alloys may require high temperatures above 1800 ℃. When choosing a tube furnace, the first thing to ensure is that its maximum operating temperature can meet actual needs.
Reserve temperature margin: In order to cope with possible temperature fluctuations and changes in future experiments, it is recommended to reserve a temperature margin of 100-200 ℃. If the actual required temperature is 1000 ℃, choosing a tube furnace with a maximum temperature of 1200 ℃ will be more reliable.

2. Length of temperature zone
Uniform heating of the sample: The length of the temperature zone determines the size of the area where the sample can be uniformly heated. The heat treatment experiment of long strip may require a longer temperature zone to ensure the uniformity of strip performance, while the small chip testing experiment can meet the requirements with a shorter temperature zone.
Avoiding energy waste: excessively long temperature zones can increase energy consumption and make temperature control more difficult, especially for small samples; If the temperature zone is too short, it cannot meet the uniform heating requirements of large-sized samples.

3. Pipe diameter size
Based on sample size: The selection of pipe diameter size should be determined according to the size and shape of the experimental sample. If larger reaction tubes are used in the experiment or larger sample volumes need to be processed, a tube furnace with a larger diameter should be selected.
Ensure reaction efficiency: A larger pipe diameter can ensure sufficient contact between the reactants and efficient reaction, but it is not advisable to choose a tube furnace with a larger diameter for experiments with trace samples, as it may affect the concentration of heat and stable temperature control.

4. Furnace structure
Horizontal and vertical: The horizontal tube furnace is easy to operate, convenient for placing and removing samples, and suitable for most conventional experiments and production operations; Vertical tube furnaces have advantages in some special experiments, such as crystal epitaxial growth experiments, which can use gravity to make the reaction gas more evenly distributed on the crystal surface.
Select according to experimental requirements: When choosing, it is necessary to determine which structure to use based on the specific requirements of the experiment and the characteristics of the sample.

5. Atmosphere protection
Avoid oxidation and reaction: In the preparation and processing of many materials, heating is required in a vacuum or specific atmosphere to prevent the material from reacting with components in the air. For example, in the preparation of high-purity metal materials, heating treatment is usually required under vacuum or inert gas protection.
Ensure experimental safety: If flammable and explosive gases are involved during the experiment, special atmosphere protection is needed to ensure safety. Therefore, when selecting a tube furnace, it is necessary to determine whether equipment with vacuum and atmosphere protection functions is needed based on the specific experimental situation.

6. Temperature control accuracy and heating rate
Temperature control accuracy: A high-precision temperature control system can ensure temperature stability during experiments or production processes, improving the reliability and reproducibility of experimental results.
Heating rate: Choose an appropriate heating rate according to experimental requirements. If rapid heating or cooling is required, a tube furnace with rapid annealing function can be considered.

7. Safety performance
Complete safety protection functions: A good tube furnace should have complete safety protection functions, such as over temperature alarm, leakage protection, emergency shutdown, etc., to ensure the safety of operators and equipment.

8. Furnace tube material and crucible selection
Furnace tube material: The choice of furnace tube material directly affects its service life and performance. According to different usage needs, materials that are resistant to high temperatures, corrosion, and oxidation can be selected, such as quartz, corundum, metals, etc. Generally speaking, quartz tubes are suitable for furnace temperatures ≤ 1200 ℃, while alumina tubes are suitable for furnace temperatures ≤ 1700 ℃.
Crucible selection: The choice of crucible is also important and should match the highest temperature in the furnace. For example, quartz crucibles are suitable for furnace temperatures ≤ 1200 ℃, while corundum crucibles are suitable for furnace temperatures ≤ 1700 ℃.

9. Other factors
Equipment cost and maintenance: When choosing a tube furnace, not only should the initial purchase cost of the equipment be considered, but also its operating and maintenance costs.
Manufacturer reputation and service: Choosing a manufacturer with good reputation and high-quality service can provide better technical support and after-sales service. If necessary, you can visit and inspect the manufacturer's factory to determine their strength.

Electric heating fluidized bed vertical tube furnace (click on the picture to view product details)

In general, when choosing an electric heating tube furnace, it is necessary to comprehensively consider multiple factors such as temperature requirements, temperature zone length, pipe diameter size, furnace structure, atmosphere protection, temperature control accuracy and heating rate, safety performance, furnace tube material and crucible selection. By carefully comparing and consulting with professionals, one can find the tube furnace equipment that is more suitable for their needs.Click to learn more Tube furnaces! Or click on online customer service to learn more about product information!