High densification using a carbon furnace for ceramics.

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last updated：Apr 20, 2026

サーモニックENG

Achieving high density of ceramics in an extremely low oxygen environment with high-temperature heating.

In the ceramics industry, increasing density is a crucial challenge to enhance product strength and durability. Particularly for ceramics used in high-temperature environments, a dense microstructure is required. Inadequate sintering can lead to a decline in product performance and potential damage. Our carbon furnace promotes the sintering of ceramics and enables densification through "ultra-low oxygen × 3000°C class × vacuum replacement." 【Application Scenarios】 - Sintering of ceramics - Promotion of phase transition and recrystallization - Control of grain growth 【Effects of Implementation】 - Improved product strength through densification - Production of high-quality products through precise temperature control - Support from research and development to small-scale production

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basic information

【Features】 - Achievement of extremely low oxygen partial pressure: Gradual reduction of oxygen potential through vacuum pumping followed by Ar/N2 replacement (with dilute H2 as needed), and absorption of residual O2 by carbon getter in the furnace material. - High-temperature stability at around 3000°C: Usual operation up to 2800°C / maximum up to 3000°C, with precise control through gradual temperature increase and holding. - Parallel evaluation of multiple samples: High flexibility in tray arrangement with rectangular trays/multi-tier shelves, enabling rapid parallel testing under the same conditions. - Continuous process from pretreatment to final firing: Continuous sequencing of vacuum, replacement, and temperature increase to suppress recontamination/reoxidation. 【Our Strengths】 We are a company that uniquely integrates the three technologies of "electricity," "equipment," and "chemistry" to develop innovative heating furnaces and other equipment. We are not just an equipment manufacturer; we are a strategic development partner that supports innovative manufacturing with advanced heating, looking ahead to the standards of the next decade in collaboration with our customers.

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Applications/Examples of results

【Regarding such issues】 ■ The presence of trace amounts of O2 leads to oxidation and decarbonization at high temperatures, resulting in unstable phase purity and grain boundary characteristics. ■ It is difficult to achieve consistent temperature application/reproduction, causing results to fluctuate due to size and fixture differences. ■ Recontamination and reoxidation occur when pre-treatment and main firing are conducted in separate furnaces. ■ The processing capacity in tube furnaces is low. *For more detailed information, please download the materials or feel free to contact us.