Sintered Ceramics & Metals
Sintered Ceramics & Metals Heat treatment of technical ceramics

Industrial furnaces for debinding and sintering of high-performance ceramics, medical ceramics, filter ceramics, functional ceramics and many other ceramics

Industrial furnaces for the heat treatment of ceramic products

Debinding and sintering of technical ceramics

Technical ceramics are ceramic materials whose properties have been optimised for demanding technical applications. They are also called engineering ceramics, high-performance ceramics, industry ceramics or industrial ceramics. Ceramic materials that have special electrical or piezoelectric properties are also called functional ceramics.

Ceramic materials are inorganic, non-metallic and polycrystalline. They are usually formed at room temperature from a raw mass of ceramic powder, organic binder and liquid. They obtain their typical material properties only in a sintering process at very high temperatures.

This is the big difference to many other material classes, especially metals. While the main material characteristics are already apparent after smelting and before shaping, the material properties, shape and size of the ceramic product are inseparably linked to the manufacturing process. The material characteristics are directly related to the preparation of the powder, the shaping and the firing process. The actual engineering work, therefore, lies in the precise design of the production process and here, above all, in the targeted influencing of the microstructures in the final sintering process.

ONEJOON masters the challenges of different firing processes, firing temperatures and firing atmospheres through its many years of experience. This allows the desired grain sizes to be set precisely and thus the most varied workpiece properties to be achieved.

With the size and shape of a ceramic component, the challenge in production increases. This hold especially true for the debinding process. ONEJOON engineers understand the main difficulties and the solutions to obtain a uniform, homogeneous structure over a large volume.

Processes

Debinding

In thermal debinding, the ceramic green body is heated and the binder is removed in the form of steam. This can be achieved by heating at ambient pressure in an oxidative or non-oxidative
atmosphere or in a vacuum. The process control during debinding is demanding. It requires an exact start at the required temperature, the controlling of chemical reactions in the product and a high temperature homogeneity. Thanks to a variety of furnace systems, ONEJOON can offer perfectly customized solutions.

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Sintering

There are many different sintering techniques and sintering processes, resulting in different properties of the sintered product. However, an end product with a reproducible and exactly defined microstructure is desired. The furnace technology is adapted by our engineers to your specific requirements and needs.

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Plant engineering

Our Industrial furnaces for the heat treatment of ceramic products

Lift Bottom Kiln

Perfect temperature homogeneity in the batch process

The Lift Bottom Kiln from ONEJOON delivers the best performance thanks to its

  • easy modularisation
  • highest temperature homogeneity
  • high-temperature sintering up to 1650 °C
  • Gas or electrical heating

A long list of references from the medical ceramics and automotive industries demonstrates the reliability and production safety of our lift bottom furnaces.

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Hubbodenoefen
Pusher Slab Furnace

The Best high temperature furnace from the technology leader

Why ONEJOON is the leader in pusher Slab Furnace technology 

  • Maximum furnace length over 40 m
  • High-temperature sintering up to over 2000 °C
  • Use of ceramic and metallic muffles
  • Aggressive, special or standard atmospheres

ONEJOON has successfully built pusher slab furnaces for almost all industries and products. New applications such as battery powder or thin-film ceramics are our latest flagship projects.

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Roller Hearth Furnace

Fast firing with ideal temperature control

Highlights of the ONEJOON roller hearth furnace                                             

  • Absolute gas-tight design
  • High temperature sluice for temperatures up to 1400 °C in continuous processes
  • Quick cooling, water cooling, indirect and direct process gas cooling
  • heated with gas, electric or hybrid

Thanks to our worldwide locations we deliver our roller furnaces to your production site quickely and reliably.

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Hybrid Furnace

Intelligent combination of the advantages of the roller furnace and pusher slab furnace

The ONEJOON hybrid furnace combines the advantages of the roller hearth furnace and pusher slab furnace in an intelligent way.

In this short video, we will demonstrate the function to you and explain the outstanding technical features of this furnace type.

 

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Tunnel furnace and Shuttle furnace

Continuous and discontinuous heat treatment of ceramics

Traditional kiln technology with state of the art Process Control. 

Tunnel and Shuttle Furnaces from ONEJOON:

  • are extremely robust at operating temperatures up to 1500 °C
  • master even the most demanding debinding processes
  • are in use worldwide
  • are widely used thanks to their high throughput and high atmosphere control and purity.
Emission control - everything from one source!

Integration of thermal & regenerative post-combustion (TNV / RNV) as well as other cleaning systems

ONEJOON connects exhaust gas cleaning systems directly to our furnaces. Our expertise - project planning and integration of: 

  • Thermal post-combustion plants / Thermal Oxidation (TO)
  • Regenerative post-combustion plants / Regenerative Thermal Oxidation (RTO)
  • DeNOx plants / denitrification plants
  • Fluorine absorbers
Our services

Individual furnace systems for your ceramic components

Just because every customer has special requirements

Together with you, we will work out the optimal solution for your ceramics. Worldwide.

  • selection of the suitable plant concept and furnace type
  • definition of the scope of delivery
  • design of the system based on your specification
  • configuration of the system from standardised components as well as customer-specific adaptations
  • presentation of the plant concept and Preparation of the offer
  • design and project management by our specialists
  • worldwide shipping
  • assembly, commissioning and acceptance of the plant at your location
  • management and supervision of the installation by German, American or Korean specialists
  • commissioning and process adjustment by our engineers for process engineering
  • preparation of the operating and maintenance instructions and the CE declaration of conformity
  • production support, if desired
  • services: plant maintenance, spare parts, repairs

We are looking forward to your request, contact us today!

3 14 Leistungen Produktinformationsblatt 630x695
References

Our References

Satisfied customers - the best proof for successful and long-standing partnerships!

Lift Bottom Kiln for sintering oxide ceramics

Dates & Facts

  • customer: German manufacturer of ceramic sensor elements for the automotive industry
  • product: Measuring probes for exhaust and engine control
  • system: Lift bottom furnace, Thermal Oxidation, cooling furnaces, automatic lifting portal for complete automation, software
  • year of construction: since 2000
  • number of pieces: approx. 30 furnaces at different locations
  • special features: floating furnace bottom sealing
  • scope of delivery: Plant layout, engineering, design, construction, installation at the customer's site, commissioning, long-term service contracts
More Information
ONEJOON Roller Hearth Kiln
For maximum flexibility in the continuous process read more
ONEJOON Pusher Slab Kiln
Continuous furnace technology for high-performance materials read more
Onejoon Simulation Teaser 420x280
CFD-Simulation
Sophisticated furnace solutions with the aid of CFD simulations read more
Heat treatment plants

More than 120 years experience in industrial furnace construction

Simon Schurr
Vice President
+49 7031 78 - 16 42
ceramics-metals@onejoon.de
Contact
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