Blacklight sintering of ceramics

Lukas Porz; Michael Scherer; Daniel Huhn; Luisa-Marie Heine; Simon Britten; Lars Rebohle; Marcel Neubert; Martin Brown; Peter Lascelles; Ross Kitson; Daniel Rettenwander; Lovro Fulanovic; Enrico Bruder; Patrick Breckner; Daniel Isaia; Till Frömling; Jürgen Rödel; Wolfgang Rheinheimer

doi:10.1039/D2MH00177B

Blacklight sintering of ceramics†

Lukas Porz,

*^ab Michael Scherer,

^a Daniel Huhn,^c Luisa-Marie Heine,^c Simon Britten,^c Lars Rebohle,^d Marcel Neubert,^e Martin Brown,

^f Peter Lascelles,^f Ross Kitson,^f Daniel Rettenwander,

^b Lovro Fulanovic,

^a Enrico Bruder,

^a Patrick Breckner,^a Daniel Isaia,^a Till Frömling,

^a Jürgen Rödel

^a and Wolfgang Rheinheimer^ag

Author affiliations

* Corresponding authors

^a Department of Materials and Earth Sciences, Technical University of Darmstadt, Darmstadt, Germany

^b Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim, Norway
E-mail: lukas.porz@ntnu.no

^c Laserline GmbH, Mühlheim-Kärlich, Germany

^d Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

^e Rovak GmbH, Grumbach, Germany

^f Heraeus Noblelight Ltd., Cambridge, UK

^g Institute for Energy and Climate Research, Forschungszentrum Jülich GmbH, Jülich, Germany

Abstract

For millennia, ceramics have been densified via sintering in a furnace, a time-consuming and energy-intensive process. The need to minimize environmental impact calls for new physical concepts beyond large kilns relying on thermal radiation and insulation. Here, we realize ultrarapid heating with intense blue and UV-light. Thermal management is quantified in experiment and finite element modelling and features a balance between absorbed and radiated energy. With photon energy above the band gap to optimize absorption, bulk ceramics are sintered within seconds and with outstanding efficiency (≈2 kWh kg⁻¹) independent of batch size. Sintering on-the-spot with blacklight as a versatile and widely applicable power source is demonstrated on ceramics needed for energy storage and conversion and in electronic and structural applications foreshadowing economic scalability.

Materials Horizons

Blacklight sintering of ceramics†

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