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![Ultra-high temperature carbon furnace [up to 2800℃]](https://image.mono.ipros.com/public/product/image/2e1/68420016/IPROS_11853087399018078000.jpg?w=280&h=280)
Maximum temperature: 2800℃! Atmosphere furnace [Graphite furnace]
Expert company in electric furnaces, atmosphere furnaces, heating, and heat treatment technology. Here is an introduction to the "Ultra High Temperature Carbon Furnace" manufactured by Marusho Electric Co.
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 super high-temperature heating furnace composed entirely of graphite (carbon) for the heater, insulation, and furnace walls. It is capable of 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 crystallization of carbon materials and sintering of ultra-high melting point metals, where high temperature and low oxygen are essential. 【Features】 ■ Super high-temperature capability ■ Low oxygen atmosphere ■ Suitable for high crystallization treatment ■ Compatible with a wide range of materials *For more detailed information, please download the materials or feel free to contact us.
Graphitization / High-temperature annealing / Surface modification / Ash content reduction all in one machine. Compatible with vacuum × Ar/H2, achieving high reproducibility for research to small-scale production heat treatment.
Our company handles "carbon furnaces" that operate at 3000°C and in extremely low oxygen conditions. We address challenges such as the inability to reduce oxygen partial pressure, leading to oxidation and decarbonization in high-temperature regions that prevent achieving target characteristics, as well as the limited tray flexibility and low processing capacity/strict sample size constraints of tube furnaces. These furnaces can be used for applications involving graphite materials, graphite foils, graphite sheets, isotropic graphite, and molded bodies. [Reasons for Effectiveness in Graphitization] - Easy to create extremely low oxygen: The furnace material captures residual oxygen chemically due to its carbon composition, and the vacuum replacement eliminates air inside the sample beforehand. - Temperature range of 3000°C: Stable heat distribution and retention in the -3000°C graphitization zone, with rapid attainment and high reproducibility. - Flexibility in tray/sleeve design: Rectangular sleeves and stacking allow for simultaneous processing of multiple samples, speeding up condition setting. - Atmospheric flexibility: It is possible to combine vacuum/Ar/N2/low concentration H2 to reduce defects and facilitate thermal desorption. *For more details, please feel free to contact us.
Suppressing micro leaks through years of seal design, processing precision, and assembly procedures! Maintaining low O2 even during long operation.
We will introduce why our small carbon furnace can achieve low oxygen and ultra-high temperatures. The carbon furnace material reacts with residual oxygen, featuring a design and manufacturing know-how that ensures it does not "leak." It removes air from inside the powder using a vacuum pump and replacement method. With a high emissivity graphite heater, a uniform heating hot zone, and high insulation, it efficiently heats while avoiding local overheating, making it possible to stably reach temperatures up to 3000°C. 【Features of the Small Carbon Furnace】 ■ Capable of reaching temperatures up to 3000°C: Quickly achieves ultra-high temperatures through the radiant heat of the graphite heater. ■ Easy to sinter in low oxygen: The carbon inside the furnace reacts with residual O2. ■ Air inside the powder is also replaced: Reduces O2 between particles through repeated vacuum and inert gas cycles. ■ Suppresses temperature variation: Reduces differences in the center, edges, and thickness direction with a "uniform heating zone" that warms evenly. *For more detailed information, please download the materials or feel free to contact us.
Achieving extremely low oxygen partial pressure through getter treatment and vacuum replacement of furnace material carbon, suitable for processing in ultra-high temperature ranges.
The "carbon furnace" we handle solves challenges such as the time-consuming condition setting and the difficulty of reproducing short cycles. By evacuating the air inside the sample in advance, we shorten the replacement time. Additionally, we can arrange square trays in parallel with flexible tray configurations, allowing for the evaluation of thickness variation effects. We also have test machines available. Please feel free to contact us if you need assistance. 【Reasons Why Our Carbon Furnace is Effective (Partially)】 ■ Sintering at Extremely Low Oxygen Partial Pressure - Gradual replacement from vacuum to Ar/N2 - Reduction of residual O2/oxidizing species through the gettering effect of carbon materials ■ Ultra-High Temperature Process - Long-term stable operation at normal use temperatures up to 2800°C, with a maximum of 3000°C - Precise control of grain growth and rearrangement through gradual heating and holding in the 1200-2600°C range *For more details, please feel free to contact us.
From preprocessing to final firing in one machine. Suitable for research and small-scale production temperature recipes.
Our "Carbon Furnace" enables precise high-temperature phase transition, crystallization, and sintering through "ultra-low oxygen × 3000℃ class × vacuum replacement." It can be used in processes such as promoting phase transition and recrystallization, controlling grain growth (phase stabilization at high temperatures), densification sintering of ceramics and difficult-to-sinter materials, and energy control of surfaces and interfaces (surface stabilization under low oxygen conditions). It is suitable for developing temperature recipes from research to small-scale production. 【Reasons Why Our Carbon Furnace is Effective (Partial)】 ■ Creates ultra-low oxygen partial pressure - Vacuum pumping → Ar/N2 replacement (dilute H2 as needed*) to gradually lower the oxygen potential * H2 is operated within the safety design range of the equipment (e.g., below 4%) - The carbon material in the furnace absorbs residual O2 through getter action, suppressing side reactions ■ High-temperature stability at 3000℃ - Regular use up to 2800℃ / maximum up to 3000℃, with gradual temperature rise and hold for precise control of phase transition, crystallization, and sintering *For more detailed information, please download the materials or feel free to contact us.
Explaining the capabilities of small carbon furnaces from a practical perspective! We will also introduce challenges and benefits.
"Although the temperature can be achieved, the targeted reaction site cannot be created." We will overcome that barrier with a small carbon furnace. In this series, we will explain the capabilities of a small carbon furnace that can reproducibly handle extremely low oxygen atmospheres (O2 ppm level) and ultra-high temperatures (2,000-3,000°C range) from a practical perspective. Do you face these challenges? ■ Heating can be done, but slight oxygen contamination causes variations in properties ■ Large furnaces have slow ramp-up times, making it difficult to establish conditions ■ Temperature unevenness and undercooking lead to instability in crystallinity and pore structure Benefits of miniaturization × extremely low O2 × ultra-high temperature ■ Reach target temperatures quickly → increases the number of trials per day ■ Ensures uniform heating even with small samples → improved reproducibility ■ Balances oxygen management and thermal history → achieves desired crystalline phases, conductivity, and microstructure In this series, we will sequentially introduce the development background, heating principles, application-specific know-how, safety design, specifications & expansions, mini case studies, and FAQs. *For more detailed information, please download the materials or feel free to contact us.
Introducing the challenges in the research field, potential solutions, and concepts!
While the demand for dry reduction heat treatment is increasing, the following challenges are prominent on-site. ■ Challenges in Research Environments - Limitations on maximum achievable temperature (recipe design is constrained by material and structural upper limits in tubular furnaces) - Limitations on sample preparation volume (effective heating area is narrow, making it unsuitable for scale considerations) - Difficulty in maintaining extremely low oxygen levels (ppm to ppb range) (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 (with small amounts of H2 as needed) and 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 detailed information, please download the materials or feel free to contact us.
Why extreme low oxygen and 3000℃ 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 is 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), the 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 detailed information, please download the materials or feel free to contact us.
Synthesis and sintering of high-temperature materials, as well as high crystallization of carbon-based materials! Here are some main application examples.
In the previous session, we introduced the "principle" of the small carbon furnace. This time, we will discuss the actual applications and how it can be applied in research and development. ■ Main Application Examples 1. Synthesis and Sintering of High-Temperature Materials (up to 3000°C) Thanks to the extremely low oxygen environment unique to carbon furnaces, it is possible to sinter high melting point materials such as carbides and nitrides without oxidation. 2. High Crystallization of Carbon-Based Materials Suitable for the high crystallization of materials like graphite and carbon nanotubes. 3. High-Temperature Treatment and Reduction Reactions of Metal Materials Metal oxides can be reduced under low oxygen conditions, allowing for control of microstructure and phases. 4. Evaluation of High-Temperature Gas Reactions Interactions with reactive gases and material stability can be verified in various atmospheres such as N2, H2, and Ar. 5. Material Process Evaluation at Research and Development and Prototype Scale Used for R&D purposes to optimize conditions in a short time. In the future, we are considering applications for the development of new materials utilizing more precise control of oxygen partial pressure. Next time, we will provide a detailed introduction to the "specifications." *For more detailed information, please download the materials or feel free to contact us.
SiC/TiC/ZrC at high temperatures and extremely low oxygen 'quickly and reproducibly.' Optimization of solid-phase carbides, composite carbides (with B4C), and carbon supply conditions in a short cycle.
We handle a compact "carbon furnace" that can be gradually replaced from vacuum to inert gas. It can be used for experiments and processes related to solid-phase carbonization (powder mixing method, coating method, carburizing) and composite carbonization (such as using B4C) for increasing hardness and optimizing carbon supply conditions (types, ratios, and contact states of carbon materials). Please feel free to contact us if you have any inquiries. 【Reasons to Choose Our Carbon Furnace (Partial)】 ■ Rapidly reaches high temperatures - Stable attainment and maintenance of 1600-2800°C** - Temperature guidelines effective for carbonization: SiC 1600–2000°C, TiC 1500–2100°C, ZrC 1800–2300°C ■ Suppresses side reactions at extremely low oxygen partial pressure - Vacuum → Replacement with Ar/N2 - Reduces residual oxygen through getter action of furnace carbon, suppressing CO generation *For more details, please feel free to contact us.
Reproduced well with 'extremely low oxygen × high temperature × vacuum replacement.' Short cycle tests for N2-based solid-phase nitriding, surface nitriding, and layer growth.
The "carbon furnace" we handle is suitable for basic reaction tests of nitriding. Since the reaction initiation temperature is high with N2 alone, balancing grain growth and coarsening is difficult, and during cooling, surface reoxidation occurs, leading to variations in color, resistance, and hardness. Our product addresses these challenges. Additionally, we have a track record of manufacturing furnaces at mass production scales, not just small units. Please feel free to contact us when you need assistance. 【Reasons Why Our Carbon Furnace is Effective】 ■ Creates an extremely low oxygen partial pressure - Gradually lowers the oxygen potential through vacuum pumping and N2 replacement - The carbon in the furnace material absorbs residual O2, suppressing oxidation side reactions ■ Quickly reaches sufficient high-temperature ranges - Achieves and maintains temperatures from 1400 to 2400°C in a short time ■ Short cycle for condition setting - Allows simultaneous evaluation of multiple samples with tray flexibility/shelf configuration, making it easier to verify the effects of thickness and contact *For more details, please feel free to contact us.
Accelerating new material development in ultra-low oxygen environments.
In research institutions engaged in new material development, precise temperature management and atmosphere control are required to maximize the properties of materials. Particularly in processes such as high-temperature phase transitions, crystallization, and sintering, oxygen concentration significantly affects the quality of the materials. Processing under inappropriate conditions may lead to undesired properties or degradation of the materials. Our carbon furnace achieves "ultra-low oxygen × 3000℃ class × vacuum replacement," enabling highly reproducible high-temperature treatments. 【Application Scenarios】 - Fundamental research on new materials - Evaluation of material properties - Small-batch production of diverse varieties 【Benefits of Implementation】 - Production of high-quality materials - Reduction of research and development time - Adaptability to a variety of materials
Support for precision molding in extremely low oxygen environments.
In the powder metallurgy industry, especially in precision molding, the sintering process is crucial for maximizing the material's properties. The control of oxygen concentration and temperature during sintering significantly affects the product's strength and dimensional accuracy, potentially leading to defects and performance degradation. Our carbon furnace achieves a precise sintering process through an ultra-low oxygen environment and high-temperature control at around 3000°C. 【Application Scenarios】 - Sintering of parts requiring high precision shapes - Sintering of special alloys and ceramics - Research and development of new materials 【Benefits of Implementation】 - Generation of high-density and homogeneous sintered bodies - Improvement in product strength and durability - Increased yield
