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Small carbon furnace Product List

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Carbon furnace

The oxygen concentration can be reduced to the limit, preventing oxidation! By improving the crystallinity of carbon materials, lifespan and performance are significantly enhanced.

The "carbon furnace" is a high-temperature heating furnace composed entirely of graphite (carbon) for the heater, insulation, and furnace walls. It enables heating in the high-temperature range of around 3000°C, which is difficult to achieve with conventional electric furnaces, while also keeping the oxygen concentration inside the furnace to an extremely low level. It is suitable for processes that require high temperatures and low oxygen, such as the sintering of carbon materials that need high crystallization and ultra-high melting point metals. 【Features】 ■ Ultra-high temperature compatibility ■ Low oxygen atmosphere ■ Suitable for high crystallization processing ■ Wide range of material compatibility *For more details, please download the PDF or feel free to contact us.

Company：サーモニックENG
Price：Other

Industrial Furnace

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Serialized Part 2: Background of the Development of Small Carbon Furnaces

Introducing the challenges in the research field, directions for solutions, and concepts!

While the demand for dry reduction heat treatment is increasing, the following challenges are prominent in the field. ■ Challenges in Research Settings - Limitations on maximum achievable temperature (recipe design is constrained by material and structural upper limits in tubular furnaces) - Limitations on sample preparation quantity (effective heating area is narrow, making it unsuitable for scale-up considerations) - Difficulty in maintaining extremely low oxygen levels (ppm to ppb level) (due to leaks, residual O2, and fine cracks from heat shock, etc.) ■ Directions for Solutions (Required Specifications) - Uniform heating in a short time: rapid temperature rise, high temperature uniformity, and good response - Flexible scaling: continuous support from small sample sizes to small-scale mass production - Atmosphere control: stabilization of extremely low oxygen levels with Ar/N2 (and a small amount of H2 as needed) plus low residual O2 design ■ Concept Graphite heating element × high insulation structure × low leak design. A compact carbon furnace optimized for prototyping and condition setting, enabling faster and more reproducible dry reduction processes. *For more details, please download the PDF or feel free to contact us.

Company：サーモニックENG
Price：Other

Industrial Furnace

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Series Part 3: The Principle of Small Carbon Furnaces

Why extreme low oxygen and 3000°C levels are possible! Explaining the principles of a small carbon furnace.

The small carbon furnace is characterized by its ability to maintain an extremely low oxygen environment and ultra-high temperatures (around 3000°C). In this explanation, we will simply clarify "why this is possible" from a fundamental perspective. 1) Why does it become "extremely low oxygen"? ■ The furnace material itself acts as an "oxygen getter." The hot zone of the furnace is composed of carbon (graphite). Residual O2/CO2/H2O reacts with carbon and is reduced and fixed as CO/CO2, effectively lowering the oxygen activity. As a result, even materials that are sensitive to oxidation can be processed in a mild atmosphere. ■ Built-in vacuum system + replacement Before heating, the system is evacuated, and by repeatedly purging with inert gas (such as Ar/N2), air inside the sample can be expelled in advance. This is effective for gas replacement in pores and powder gaps that cannot be reached by simple "ventilation." 2) Why is "3000°C" possible? ■ Heating element = high-temperature stability of graphite Graphite exhibits extremely high heat resistance under inert atmospheres and vacuum, allowing for efficient heating of the hot zone through resistance heating. *For more details, please download the PDF or feel free to contact us.