What are the advantages of high-temperature vertical tube furnace?

The high-temperature vertical tube furnace, with its unique design and advanced technology, has demonstrated significant advantages in material processing, scientific research experiments, and industrial production. The following is a detailed analysis of its core advantages:

1. Structural advantages: compact and efficient, high space utilization
Vertical design
Small footprint: The vertical structure makes the equipment highly concentrated, suitable for scenarios where laboratory or production line space is limited.
Smooth material flow: The sample is added from the furnace top and naturally falls to the furnace bottom by gravity, reducing the risk of mechanical jamming, especially suitable for powder or granular material processing.
Modular furnace tube
Quick replacement: Furnace tubes (such as quartz tubes and ceramic tubes) are connected by flanges and can be quickly disassembled and replaced to meet different process requirements (such as high-temperature oxidation and reduction atmospheres).
Multi station compatibility: supports single or multiple parallel designs, can process multiple samples simultaneously, and improves experimental efficiency.

2. Temperature control: precise and stable, suitable for complex processes
High precision temperature control system
PID intelligent regulation: Real time monitoring of furnace temperature through thermocouples, combined with PID algorithm to automatically adjust heating power, with temperature fluctuations controlled within ± 1 ℃.
Multi segment program temperature control: supports segmented programming for heating, constant temperature, and cooling, meeting the requirements of complex process curves such as annealing, quenching, and sintering.
Uniform heating technology
Three dimensional thermal field design: Heating elements (such as silicon carbon rods and silicon molybdenum rods) are evenly distributed around the furnace tube, combined with radiation and convective heat transfer, to ensure that the radial temperature difference inside the furnace is ≤ 5 ℃.
Rotating sample stage (optional): Some models are equipped with a rotating function to make the sample heated more evenly and avoid local overheating.

3. Atmosphere control: flexible and diverse to meet special needs
Dual mode of vacuum and atmosphere
High vacuum environment: The ultimate vacuum degree can reach 1 × 10 ⁻ ³ Pa, suitable for processes that require oxygen free conditions such as metal degassing and ceramic sintering.
Atmosphere displacement system: It can introduce gases such as nitrogen, argon, hydrogen, or mixed gases (such as N ₂+H ₂) to control reactions such as oxidation, reduction, and carburizing.
Accurate control of gas flow rate
Mass flow meter (MFC): adjusts gas flow rate through digital interface, with an accuracy of ± 1% FS, ensuring atmosphere stability.
Multi channel gas channel: supports the simultaneous introduction of multiple gases to meet the requirements of composite processes (such as first reducing with hydrogen and then cooling with nitrogen).

4. Material adaptability: Broad spectrum compatibility, expanding application boundaries
High temperature resistant furnace tube
Quartz tube: Temperature resistant to 1200 ℃, good transparency, suitable for optical material processing or processes that require observation.
Ceramic tube (alumina/zirconia): resistant to temperatures up to 1700 ℃, with excellent chemical stability, suitable for corrosive atmospheres or metal melting.
Metal tube (stainless steel/Hastelloy): resistant to temperatures up to 1000 ℃, suitable for environments with strong reducing properties or acidic gases.
Optimization of insulation layer
Multilayer composite structure: outer stainless steel shell+middle alumina fiber+inner nano aerogel, which reduces heat loss and has remarkable energy-saving effect.
Water cooling jacket (optional): The high-temperature section is cooled by circulating water to prevent overheating of the furnace body and extend the service life of the equipment.

5. Safety and reliability: multiple protections to ensure stable operation
Active safety system
Overtemperature protection: When the temperature exceeds the set value, it automatically shuts off to prevent damage to the furnace tube or sample.
Leakage protection: When the leakage current is ≤ 30mA, immediately cut off the power supply, in accordance with IEC safety standards.
Pressure alarm: Trigger sound and light alarm when vacuum or positive pressure is abnormal to avoid equipment damage.
Passive safety design
Explosion proof flange: The connection between the furnace tube and the furnace body is sealed with a double O-ring and equipped with a pressure relief valve to prevent gas leakage or explosion.
Insulation material: High alumina ceramic insulation blocks are used between the heating element and the furnace body, with a temperature resistance of 1600 ℃ to ensure electrical safety.

6. Application scenario: Multi domain coverage to improve research and development efficiency
Materials Science
Ceramic sintering: Preparation of high-purity alumina and silicon nitride ceramics under vacuum or inert atmosphere.
Metal heat treatment: achieving bright annealing of titanium alloys and stainless steel through hydrogen reduction.
semiconductor industry
Silicon wafer annealing: Relieve stress and improve device reliability in a nitrogen atmosphere.
Curing of photoresist: Vacuum environment reduces bubbles and improves coating uniformity.
new energy sector
Lithium battery materials: Sintering positive electrode materials (such as NCM, LFP) under argon protection to prevent oxidation.
Hydrogen storage and transportation: Testing the hydrogen absorption and release performance of metal hydrides requires precise control of hydrogen partial pressure.

7. Economy: Long term cost advantage
Energy-saving design
Optimization of insulation layer: reduced heat loss and energy consumption per experiment.
Rapid heating: The heating rate of the silicon molybdenum rod heating element reaches 10 ℃/min, shortening the experimental period.
Low maintenance cost
Modular design: Heating elements, furnace tubes, and other vulnerable parts can be replaced separately, reducing maintenance costs.
Long life material: Alumina ceramic furnace tubes have a longer service life and reduce replacement frequency.