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The use of volumetric microwave heating to augment conventional heating in gas and electric kilns significantly reduces issues due to temperature gradients leading to improved product quality and kiln operation. Calcination, sintering and drying of materials can be achieved with equal or improved product quality and significantly reduced energy costs. Key applications include:

  • Firing of large-scale clays and ceramics; e.g. bricks and ceramic products such as sanitary ware
  • Catalyst processing
  • Firing of precision ceramics e.g. for electronics and power generation industries

Our study on firing clay products shows some of the benefits compared to traditional firing techniques.

Benefits versus Traditional Kilns

Key benefits include:

  • Up to 50% reduction in energy usage and cost
  • Reduced firing temperatures
  • Smaller footprint for same throughput
  • Accelerated drying and firing cycles; up to 2.5 times faster than conventional cycles
  • Reduced thermal stresses leading to improved product quality
  • Lower grain growth during sintering leading to increased mechanical properties
  • Production of catalysts with improved properties such as specific surface area

What we can do for you

C-Tech Innovation has worldwide patents for this “microwave-assisted” technology and works with its licensees to provide both laboratory and industrial scale gas and electric kilns.

To justify the investment in this equipment it is generally critical that an informed assessment is made at an early stage. C-Tech Innovation can provide such a service:

  • Process development and evaluation of benefits using our laboratory scale microwave assisted kilns
  • Design of microwave and radio frequency assisted kilns; including bespoke systems, batch, tunnel and rotary kilns
  • Build of pilot scale rotary kilns
  • Retrofitting microwave to traditional kilns
  • Working in conjunction with kiln manufacturers to realize industrial scale equipment



Investigating new designs for ecological furnaces to provide energy efficient high temperature processing for glass, ceramics, cement and metal castings.

Project website


The MAGF project aims to introduce microwave technology into Danish brickworks, cutting production times and fluoride emissions and leading to energy savings of up to 50%.

Project datasheet


A combination rotary kiln that uses both radiant heat and microwave heating to process a variety of materials used in the chemicals, fine chemicals, and building materials sectors.

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