The selection of customized laboratory vacuum atmosphere tube furnaces requires comprehensive consideration of core parameters such as temperature range, atmosphere control, vacuum degree, furnace size, heating elements, temperature control accuracy, safety, and operational convenience, and optimization based on specific experimental needs. Let's take a detailed look at the selection precautions below!

1600 ℃ customized vacuum atmosphere tube furnace (click on the picture to view product details)

1. Temperature range and uniformity
Maximum temperature: Choose according to experimental requirements, such as 1200 ° C (metal heat treatment), 1400 ° C (ceramic sintering), or 1700 ° C (high-temperature alloy).
Constant temperature zone length: Ensure that the sample is completely in the constant temperature zone to avoid temperature gradients affecting the experimental results.
Heating rate: High temperature experiments require controlling the heating rate (such as ≤ 10 ° C/min) to prevent sample cracking caused by thermal stress.

2. Atmosphere control
Gas type: Supports inert gases (N ₂ Ar）、 Reducing gases (H ₂, CO) or mixed gases require gas flow meters and pressure monitoring.
Airtightness: Double rubber ring sealing or metal sealing (such as KF flange) is used to ensure vacuum degree and atmosphere stability.
Gas washing function: After vacuuming, fill inert gas multiple times to completely eliminate residual oxygen.

3. Vacuum requirement
Ultimate vacuum degree:
Ordinary experiment: 10 ⁻ ³ Pa (mechanical pump).
High precision experiments (such as nanomaterial synthesis): 10 ⁻⁴ Pa (mechanical pump+molecular pump combination).
Leakage rate: ≤ 1 × 10 ⁻⁸ Pa · m ³/s, to avoid a decrease in vacuum degree during the experimental process.

4. Furnace size and material
Furnace tube diameter and length: Select according to the sample size, ensuring that the distance between the sample and the inner wall of the furnace tube is ≥ 20mm to avoid uneven thermal radiation.
Furnace tube material:
Quartz tube: ≤ 1200 ° C, acid resistant atmosphere, but afraid of alkaline vapors (such as NaOH).
Corundum tube (Al ₂ O ∝): ≤ 1600 ° C, strong corrosion resistance, but requires slow heating (≤ 5 ° C/min).
Stainless steel tube: limited to inert atmosphere, prone to oxidation and contamination of the sample when the vacuum degree is insufficient.

5. Heating element and temperature control system
Heating element:
Resistance wire: ≤ 1200 ° C, low cost, but short lifespan.
Silicon carbon rod: 1200 ° C~1400 ° C, heats up quickly, but is prone to oxidation.
Silicon molybdenum rod: ≥ 1600 ° C, high temperature resistance, but needs to be used in an inert atmosphere.
Temperature control system:
PID control, temperature control accuracy ± 1 ° C.
Program temperature control (over 30 stages), supporting multi-stage heating, insulation, and cooling curves.

6. Safety and operational convenience
Security function:
Overtemperature alarm and automatic power-off.
Pressure monitoring and overpressure protection (furnace tube pressure ≤ 0.02 MPa).
Hydrogen leak alarm (if using H ₂ atmosphere).
Convenience of operation:
Touch screen control, supporting data recording and export.
Quick cooling function (such as air cooling or water cooling) to shorten the experimental cycle.
Furnace door opening method: side opening or top opening, convenient for sample loading and unloading.

7. Customized requirements
Special Features:
Rotating furnace tube: suitable for uniform coating or powder sintering.
Multi zone control: achieving temperature gradients in different areas of the furnace tube.
In situ observation window: equipped with quartz glass observation window, real-time monitoring of sample status.
Size and interface: Customize the furnace body size according to the laboratory space and provide standard flange interfaces (such as KF25, CF35).

8. Brand and after-sales service
Brand selection: Prioritize manufacturers with good brand reputation to ensure equipment quality and stability.
After sales service: Provide installation and debugging, operation training, regular maintenance, and quick response repair services.
Selection Example
Experimental requirement: 1400 ° C high-temperature sintered ceramic samples need to be immersed in an Ar atmosphere with a vacuum degree of ≤ 10 ⁻ Pa.
Recommended configuration:
Furnace tube material: Corundum tube (Φ 80 × 1000 mm).
Heating element: silicon carbide rod, rated power 5 kW.
Temperature control system: PID 30 segment program temperature control, with an accuracy of ± 1 ° C.
Vacuum system: combination of mechanical pump and molecular pump, with a maximum vacuum degree of 10 ⁻⁶ Pa.
Safety functions: over temperature alarm, over pressure protection, hydrogen leak alarm.
Operation mode: Touch screen control, supports data export.

Customized rotatable tilted vacuum atmosphere tube furnace (click on the picture to view product details)

In general, when choosing a customized vacuum atmosphere tube furnace for laboratory use, it is recommended to communicate with relevant technical personnel about the parameters you need, so as to customize a vacuum atmosphere tube furnace that is more suitable for your experiment!Click to learn more Customized tube furnaces! Or click on online customer service to learn more about product information!