What is the working temperature of a customized corundum tube furnace?

The working temperature range of customized corundum tube furnace is usually from room temperature to 1600 ℃ -1750 ℃, depending on the furnace design and usage conditions. Its core characteristics and temperature adaptability are as follows:

1. Maximum operating temperature: 1600 ℃ -1700 ℃ (short-term peak)
Material limit: The short-term temperature resistance limit of corundum tube (high-purity alumina ceramic tube, Al ₂ O ∝ ≥ 99%) can reach 1700 ℃, but the actual furnace design needs to consider the stability of heating elements, insulation materials, and sealing systems. Therefore, the maximum temperature of mainstream customized furnaces is usually set between 1600 ℃ and 1700 ℃.
Example:
1600 ℃ tube furnace: using silicon molybdenum rod heating, suitable for special ceramic sintering, refractory metal heat treatment and other scenarios.
1700 ℃ tube furnace: equipped with Kathal Super-1700 silicon molybdenum rods, supporting extreme processes such as high-temperature alloy melting and carbide synthesis.
Continuous operating temperature: The long-term stable operating temperature is generally lower than the maximum temperature by 200 ℃ -300 ℃ to extend the service life of the equipment. For example, the continuous working temperature of a 1600 ℃ furnace type is usually between 1400 ℃ and 1500 ℃.

2. Temperature control accuracy: within ± 1 ℃
Intelligent temperature control system: using PID algorithm and fuzzy control technology, combined with S-type/B-type thermocouples, to achieve temperature fluctuation of ≤± 1 ℃, meeting the temperature sensitive process requirements of lithium-ion battery materials, fuel cell catalysts, etc.
Example:
1500 ℃ six temperature zone tube furnace: Each temperature zone is independently controlled, with a constant temperature zone length of 800mm and a temperature uniformity of ± 2 ℃.
1600 ℃ touch screen temperature control furnace: supports 30 temperature rise and fall programs, programmable control of “time temperature” curve to ensure experimental repeatability.
Temperature rise and fall rate control:
Recommended speed: 5 ℃/min (conventional process), to avoid rapid cooling and heat conduction causing the rupture of the corundum tube.
Extreme speed: Some furnace types support rapid heating at 20 ℃/min, but it is necessary to strictly follow the material’s thermal stress tolerance range.

3. Temperature adaptability advantage
High temperature stability: The corundum tube will not deform or evaporate after long-term use at 1600 ℃, ensuring a pure atmosphere inside the furnace and avoiding impurities from contaminating the material.
Application scenarios:
Calcination and carbonization of positive electrode materials for lithium-ion batteries, such as lithium cobalt oxide and lithium iron phosphate.
Reduction and oxidation treatment of fuel cell catalysts (such as platinum/carbon, platinum alloys).
Low temperature compatibility: The furnace body can be set to any temperature point from room temperature to the highest temperature, supporting processes such as low-temperature annealing and crystallization control.
Example: Low temperature annealing (200 ℃ -600 ℃) of perovskite solar cell thin films requires precise control of temperature gradient to optimize photoelectric conversion efficiency.

4. Customized temperature design
Multi zone independent control: Customize dual zone, triple zone, or multi zone furnace bodies according to process requirements to achieve independent temperature management for heating, reaction, and cooling.
Example: In the preparation of silicon carbon composite negative electrode materials, the precursor is decomposed in the low-temperature zone, the composite reaction between silicon and carbon is promoted in the high-temperature zone, and the reaction rate is controlled in the intermediate temperature zone.
Gradient temperature control function: supports programmed heating and cooling, simulates the thermal history of materials in practical applications, optimizes grain size and distribution.
Application scenario: Gradient calcination of lithium-ion battery materials, controlling the phase transition process through segmented temperature control to enhance battery cycling performance.