Small Carbon Furnace | Why is ultra-low oxygen and 3000°C class possible?

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last updated：Jun 05, 2026

サーモニックENG

Suppressing residual oxygen while reaching 3000°C. An explanation of the structure and principle of a small carbon furnace.

The small carbon furnace is characterized by its ability to achieve both an extremely low oxygen atmosphere and ultra-high temperature processing at around 3000°C. This document explains why it is possible to maintain a low oxygen environment and why high-temperature processing at around 3000°C is achievable, from the perspectives of furnace materials, vacuum replacement, inert gas purging, and thermal design. By constructing the interior of the furnace with graphite components, it becomes easier to suppress the influence of oxidative components such as residual O2, CO2, and H2O in high-temperature regions. Additionally, by combining vacuum pumping with inert gas replacement using Ar/N2, the air remaining inside the powder and the furnace is expelled, creating an atmosphere suitable for processing materials that are sensitive to oxidation. [Explanation Contents] ■ Why can an extremely low oxygen atmosphere be formed? ■ The role of vacuum replacement and inert gas purging ■ Reduction of oxygen influence through graphite furnace materials ■ Why is ultra-high temperature processing at around 3000°C possible? ■ Reasons suitable for graphitization, carbonization, and high-temperature sintering *For more details, please download the document or contact us.

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**Principle of Small Carbon Furnace** ■ Deoxygenation with Carbon Materials in the Furnace - The furnace is constructed with graphite materials. - Reduces the influence of oxidative components such as residual O2, CO2, and H2O at high temperatures. - Creates an atmosphere suitable for processing carbon materials and materials sensitive to oxidation. ■ Vacuum Replacement + Inert Gas Purging - After vacuuming, replaced with inert gases such as Ar/N2. - Effective not only for replacing air in the furnace but also for displacing air trapped within the powder. - Contributes to reducing oxygen in hard-to-reach voids that are difficult to access with simple gas circulation. ■ Thermal Design Achieving 3000°C Class - Optimizes heating elements, insulation materials, and fixtures as a hot zone. - Minimizes radiation and conduction losses, efficiently raising temperatures to ultra-high ranges. - Achieves both high maximum temperatures and temperature stability even in small furnaces. ■ Compatibility of Vacuum and Inert Atmosphere - Combines vacuum replacement and inert atmosphere to suppress oxidation at high temperatures. - Supports operation at 3000°C class while ensuring the durability of graphite components. *For more details, please download the materials or contact us.*

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【Applicable Fields】 ■ Graphitization and high crystallization treatment of carbon materials ■ High-temperature modification of CNTs, CNFs, carbon black, and graphite sheets ■ Production and sintering of carbide materials such as SiC and B4C ■ High-temperature treatment of ceramics such as Si3N4 and AlN ■ Sintering of high melting point metals, metal powders, and powder metallurgy materials ■ Research and development or small-scale prototyping requiring low oxygen atmosphere 【Recommended for Those Who】 ■ Want to know why treatment at around 3000°C is possible in a carbon furnace ■ Want to suppress oxidation and re-oxidation during high-temperature treatment ■ Want to reduce the influence of oxygen and air remaining inside the powder ■ Want to consider the conditions for graphitization, carbonization, sintering, and high-temperature modification ■ Find that general furnaces lack sufficient temperature and atmosphere Even at the stage where materials, processing temperatures, and atmospheric conditions are not yet determined, you can consult us according to your application.