blog about Selecting the Best Hightemperature Tube Furnace for Research

In materials science research, precise temperature control from 1100°C to 1800°C or higher is often critical. Even minor temperature variations can lead to significant deviations in experimental results. Choosing an appropriate tube furnace becomes paramount to ensure experimental success and data reliability. This article examines Carbolite Gero's tube furnace product line, offering comprehensive selection guidance based on temperature range, heating length, tube diameter, and application requirements.

As a leader in thermal processing equipment, Carbolite Gero's universal tube furnace series stands out for its exceptional temperature control and flexible configuration options. The product line covers a broad temperature range from 1100°C to 1800°C, offering both horizontal and vertical orientations, along with multiple heating lengths and tube diameters to accommodate diverse experimental needs.

The TF series represents one of Carbolite Gero's most popular models, combining versatility with cost-effectiveness. With operating temperatures from 1100°C to 1600°C, heating lengths from 150mm to 1200mm, and tube diameters ranging from 32mm to 125mm, these furnaces accommodate both horizontal and vertical configurations. Optional accessories include gas control systems, vacuum systems, and data loggers to expand functionality.

Key Features:

• Temperature range: 1100°C - 1600°C
• Heating length: 150mm - 1200mm
• Tube diameter: 32mm - 125mm
• Orientation: Horizontal/Vertical
• Applications: Material synthesis, heat treatment, atmosphere sintering, CVD

Designed specifically for high-temperature operations, the FHA/FHC series reaches up to 1350°C, with heating lengths from 200mm to 1250mm and tube diameters between 40mm and 150mm. Like the TF series, these models offer both orientation options and customizable accessories.

Key Features:

• Temperature range: Up to 1350°C
• Heating length: 200mm - 1250mm
• Tube diameter: 40mm - 150mm
• Orientation: Horizontal/Vertical
• Applications: Ceramic sintering, high-temperature annealing, materials research

The HTRH series represents Carbolite Gero's premium offering for ultra-high-temperature applications, reaching 1800°C. With heating lengths from 100mm to 600mm and tube diameters between 47mm and 200mm, these horizontal furnaces incorporate advanced temperature control systems for uniform heat distribution.

Key Features:

• Temperature range: 1600°C - 1800°C
• Heating length: 100mm - 600mm
• Tube diameter: 47mm - 200mm
• Orientation: Horizontal
• Applications: Advanced materials research, specialty ceramic sintering, single crystal growth

Similar to the HTRH series but designed for vertical operation, the HTRV models also achieve temperatures up to 1800°C, with heating lengths from 100mm to 500mm and tube diameters between 40mm and 200mm.

Key Features:

• Temperature range: 1600°C - 1800°C
• Heating length: 100mm - 500mm
• Tube diameter: 40mm - 200mm
• Orientation: Vertical
• Applications: High-temperature materials research, specialty ceramic sintering, powder metallurgy

The AZ series features multiple independently controlled heating zones (up to eight), enabling precise temperature gradient control for specialized applications like directional solidification and thermoelectric material testing. These horizontal furnaces operate up to 1350°C, with heating lengths from 360mm to 1000mm and tube diameters between 32mm and 110mm.

Key Features:

• Temperature range: Up to 1350°C
• Heating length: 360mm - 1000mm
• Tube diameter: 32mm - 110mm
• Orientation: Horizontal
• Applications: Directional solidification, thermoelectric material evaluation, catalyst testing

1. What is the maximum operating temperature of tube furnaces?

Carbolite Gero's product line spans from 1100°C to 2600°C, with specific models using different heating elements (resistance wires, silicon molybdenum rods, or silicon carbide) to achieve various maximum temperatures.

2. How does a tube furnace work?

Samples are placed inside a tube while external heating elements raise the temperature. The tube, made from ceramic, quartz, or metal, protects both the samples and heating elements. Advanced models may include temperature gradient controls for precise thermal distribution.

3. What tube sizes are available?

Standard options range from 32mm to 200mm in diameter and 150mm to 1200mm in length, with custom sizes available. Selection depends on sample dimensions, quantity, required temperature uniformity, and gas flow requirements.

4. Is a tube required for operation?

Yes, tubes are essential for protecting heating elements and controlling atmosphere. Alternative containers may be used if they withstand high temperatures and prevent contact with heating elements.

5. What types of tubes are suitable?

Common options include ceramic (alumina, mullite), quartz, and metal (stainless steel, Inconel) tubes, selected based on temperature requirements, chemical compatibility, and specific experimental needs.