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Direct shaping of oxides by laser insolation of transition metal oxalates

Abstract : Films of copper and cobalt-iron oxalates were prepared from suspensions of powders in ethane-1,2-diol deposited on glass or polycarbonate substrates. Two-dimensional structures of oxides, resolved on the scale of less than ten micrometers, were formed by laser insolation of these films, using a photolithography machine. The nature of the constitutive phases of the oxides formed tends to show that the laser heating makes it possible to reach locally, temperatures higher than 1000 ◦C. The oxides formed are thus sintered. The residual oxalate can be removed by washing or dissolving, leaving the oxide structure on its substrate. In spite of a perfectible sintering, the formed structures could interest different technological applications (electronic or magnetic devices, gas sensors, photovoltaic systems. . .) requiring the shaping of simple or mixed oxides on a scale close to the micrometer. The process of selective laser decomposition of oxalates, could subsequently be suitable for additive manufacturing of 3D parts.
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Submitted on : Monday, April 16, 2018 - 5:02:17 PM
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Isabelle Pasquet, Hoa Le Trong, Valérie Baco-Carles, Lionel Presmanes, Corine Bonningue, et al.. Direct shaping of oxides by laser insolation of transition metal oxalates. Journal of the European Ceramic Society, Elsevier, 2017, 37 (16), pp.5315-5320. ⟨10.1016/j.jeurceramsoc.2017.03.030⟩. ⟨hal-01767894⟩



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