Carbon furnace | Supports ultra-low oxygen and high-temperature firing tests at 3000°C level.

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last updated：Jun 24, 2026

サーモニックENG

Re-evaluation of high-temperature treatment at around 3000°C using vacuum replacement and carbon gettering.

We can accommodate ultra-low oxygen and ultra-high temperature sintering tests before equipment installation. Even at a stage where temperature, atmosphere, and processing time are not yet determined, you can consult us about the test conditions tailored to your objectives. Through preliminary evaluations using actual samples, we can confirm graphitization, recrystallization, grain growth, phase formation, and oxidation effects, which can be utilized in the consideration of equipment specifications. Our "carbon furnace" addresses challenges such as the time-consuming condition setting and the difficulty of achieving reproducibility in short cycles. By evacuating the air inside the sample in advance, we shorten the replacement time. Additionally, with the flexibility of tray arrangement and shelf configuration, we can arrange rectangular containers in parallel, allowing for the evaluation of thickness variation effects. We also have test equipment available. Please feel free to contact us when needed. [Reasons Why Our Carbon Furnace is Effective (Partial)] ■ Sintering under ultra-low oxygen partial pressure - Vacuum → staged replacement with Ar/N2 - Reduction of residual O2/oxidizing species through the getter effect of carbon materials ■ Ultra-high temperature processes - Long-term stable operation in the range of 2800°C for regular use, up to a maximum of 3000°C - Precise control of grain growth and rearrangement through gradual heating and holding in the range of 1200°C to 2600°C *For more details, please feel free to contact us.

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basic information

**Features of Our Carbon Furnace** - Short cycle time and high reproducibility - Simultaneous evaluation of multiple samples **Items that can be confirmed during testing** - Comparison of graphitization, recrystallization, and phase formation based on processing temperature and holding time - Confirmation of oxygen effects under vacuum replacement and Ar/N₂ replacement conditions - Confirmation of particle growth and densification behavior based on heating rate and gradual heating hold - Evaluation of temperature uniformity and reaction uniformity based on sample arrangement, jig material, and filling amount - Confirmation of processing conditions by shape, such as powder, pellets, small pieces, and molded bodies *For more details, please feel free to contact us.*

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Applications/Examples of results

【Examples of Test Applications Before Equipment Introduction】 ■ Graphitization and high-temperature treatment of carbon materials ■ High-temperature phase formation of ceramics, carbides, and nitrides ■ Small-scale prototyping with powders, pellets, small pieces, and molded bodies ■ Recrystallization and grain growth evaluation in ultra-low oxygen atmosphere ■ Confirmation of densification, sintering, and microstructural changes through high-temperature holding ■ Screening of temperature and atmosphere conditions before mass production furnace introduction 【For Such Challenges】 ■ Oxidation and re-oxidation occur at high temperatures, hindering desired crystallization and phase transitions ■ Temperatures in the range of 2400–3000°C are required, but general furnaces lack sufficient temperature and atmosphere ■ Air inside the furnace material cannot be evacuated, making low oxygen effects difficult to achieve ■ It takes time to establish conditions, making reproducibility in short cycles challenging *For more details, please feel free to contact us.