What aspects should be considered when selecting high-temperature tube furnaces for laboratory use?

When selecting a high-temperature tube furnace for laboratory use, the following key aspects should be noted:

Temperature range:
Determine the required maximum temperature and continuous operating temperature based on experimental requirements.
The type of heating element determines the maximum operating temperature of the furnace. Common heating elements include resistance wires, silicon carbon rods, silicon molybdenum rods, etc., and their corresponding temperature ranges also vary.
The material of the furnace tube can also affect the temperature range, for example, quartz tubes are usually suitable for lower temperatures (≤ 1200 ℃), while alumina ceramics or ceramic fibers are suitable for higher temperatures (≥ 1200 ℃).
Sample size and furnace tube size:
Select the appropriate furnace tube diameter and volume based on the size of the sample.
Ensure that the furnace tube size can accommodate the sample and leave enough space for atmosphere flow and uniform temperature distribution.
Temperature zone configuration:
Choose a single temperature zone or multi temperature zone tube furnace according to experimental requirements.
The multi zone furnace has multiple independently controlled constant temperature zones, suitable for experiments that require temperature gradients or long-term heating.
Functional requirements:
Consider whether an atmosphere introduction function is required, as well as the type of atmosphere required (such as nitrogen, argon, hydrogen, etc.).
Do you need a fast heat treatment function (such as RTP tube furnace).
Do you need high pressure/vacuum processing function.
Do you need a rotation function to improve the uniformity of powder processing.
Temperature control accuracy and intelligent temperature control system:
Choose a furnace with a high-precision temperature control system to ensure the accuracy and reproducibility of experimental results.
The intelligent temperature control system can monitor the temperature inside the furnace in real time and automatically adjust it, improving the convenience of experiments.
Security performance:
Choose a furnace with safety features such as over temperature protection and leakage protection to ensure safety during the experimental process.
Consider the sealing and stability of the furnace body to avoid accidents during the experimental process.
Durability and stability:
Consider the durability of furnace materials and heating elements, as well as the stability of the overall structure.
Choose a furnace with good insulation performance and low energy consumption to reduce long-term operating costs.
After sales service and technical support:
Understand the supplier’s after-sales service policy, including warranty period, repair services, etc.
Consider whether the supplier provides technical support and training services to ensure timely resolution of any issues encountered during use.
Cost and Budget:
Choose the appropriate tube furnace model and configuration based on the budget.
The prices of tube furnaces of different brands and models vary greatly, and it is necessary to weigh them according to actual needs.