Lab Tube Furnace

Scope of application

Widely used in gas-phase synthesis of nanomaterials, such as CVD growth of carbon nanotubes (CNTs) (by introducing acetylene/methane to crack at 800-1100°C), chemical vapor deposition of two-dimensional materials (such as MoS₂), and pyrolysis synthesis of quantum dots; in energy material research, it is used for nitrogen-protected sintering of lithium battery cathode materials (to prevent oxidation).

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Lab Tube Furnace

lab tube furnace is a high-temperature heating device widely used in laboratories or small-scale R&D. It features a tubular furnace chamber, using electric heating elements to uniformly heat samples within a sealed tube. Compared to large industrial furnaces, laboratory tube furnaces offer a compact design, precise temperature control, and controlled atmosphere, making them suitable for small-batch material processing, process R&D, and performance testing.

Typical features include:

The furnace chamber is cylindrical or mounted horizontally or vertically.

The sample is placed within a high-temperature-resistant tube such as a quartz tube, corundum tube, or silicon carbide tube.

It can operate in air, inert gas, reducing atmosphere, or even vacuum.

The temperature range extends from room temperature to 1800°C (depending on the heating element and tube material).

II. Structural Components

A laboratory tube furnace primarily consists of the following components:

Furnace Shell

This shell is typically constructed of cold-rolled steel with an electrostatically sprayed plastic coating, and is filled with high-density insulation material. It offers an attractive appearance, corrosion resistance, and excellent thermal insulation.

Heating Elements

Common Materials: FeCrAl alloy wire (≤1200°C), SiC silicon carbide rod (≤1500°C), MoSi₂ (≤1800°C)

Evenly distributed around the furnace to ensure a stable temperature field.

Furnace Tube (Working Tube)

Material: Quartz (≤1200°C), 99% high-purity corundum (≤1800°C), Silicon Carbide (corrosion-resistant and high-temperature), Stainless Steel (special atmosphere)

Dimensions: Common inner diameters range from 25 to 150 mm, and lengths range from 600 to 1500 mm.

Sealing flange & piping system

Equipped with high-temperature-resistant O-rings or water-cooled sealing structure

Can be connected to the gas system to achieve inert gas, reducing atmosphere, or vacuum operation

Temperature control system

Equipped with an intelligent PID thermostat, with programmable ramp, constant temperature, and cooling curves

Supports multi-stage programming (commonly 16 to 50 stages), with a temperature control accuracy of ±1°C

Safety protection system

Overtemperature protection, burnout protection, overcurrent/leakage protection

High temperature alarm and power-off protection

III. Main Types

Based on the installation method, number of heating zones, and atmosphere conditions, laboratory tube furnaces can be divided into the following categories:

By Installation Method

Horizontal Tube Furnace: General-purpose, easy to operate

Vertical Tube Furnace: Suitable for gravity settling and gas-solid reactions

Split Tube Furnace/Open Tube Furnace Furnace: Convenient for changing furnace tubes and loading and unloading samples

By number of temperature zones

Single zone: Single heating zone, stable temperature field

Dual zone: Enables temperature gradients

Triple zone: Enables long constant temperature zones or complex temperature distributions

By atmosphere conditions

Atmospheric pressure air atmosphere

Inert gas blanket (argon, nitrogen, etc.)

Reducing atmosphere (hydrogen, mixed gas, etc.)

Vacuum tube furnace

V. Application Areas

Laboratory tube furnaces are widely used in fields such as materials science, chemical engineering, energy research and development, and environmental engineering. For example:

Powder material sintering (ceramics, metal powders, catalysts)

Heat treatment (annealing, tempering, and quenching experiments)

CVD/PVD thin film deposition and growth

Gas-solid reaction research

Carbonization and activation (production of activated carbon and biochar)

Crystal growth and annealing

VI. Selection Recommendations

Temperature Rating: Select the heating element and furnace tube material based on the maximum process temperature.

Tube Diameter and Length: Determine based on sample size and batch size.

Number of Temperature Zones: Multiple temperature zones are available if a temperature gradient is required.

Atmosphere Conditions: If inert, reducing, or vacuum conditions are required, the corresponding gas path and sealing system must be configured.

Safety and Data Functionality: Whether over-temperature alarm, program storage, and data export are required.

Lab Tube Furnace Technical Parameters

Model	Max temperature	Heating zone length	Constant temperature zone length	Power and voltage	Furnace tube size	Dimensions
YXG-1200-A1	1200℃	200mm	60mm	1.5kW/AC220V	φ30/50*500mm	800340400mm
YXG-1200-A2	1200℃	440mm	120mm	3kW/AC220V	φ30/100*1000mm	1120480530mm
YXG-1200II-200	1200℃	200+200mm	200mm	3KW/AC220V	φ30/100*1000mm	1100420560mm
YXG-120OIII-200	1200℃	3*200mm	3*60mm	4.5KW/AC220V	φ30/100*1000mm	1400420560mm
YXG-1400-400	1400℃	400mm	120mm	5kW/AC220V	φ30/100*1000mm	1200500660mm
YXG-140OIl-200	1400℃	200+200mm	200mm	5kW/AC220V	φ30/100*1000mm	1200500660mm
YXG-1700-290	1700℃	290mm	80mm	6kW/AC220V	φ30/100*1000mm	1300640870mm