Cooling device comprising a paramagnetic garnet ceramic
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsJean-Marc Duval, Christophe Marin, Diego Augusto Paixao Brasiliano, Emmanuelle Bichaud, Jean-Louis Durand
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Abstract
A magnetic cooling device includes a magnetocaloric element, the magnetocaloric element being a paramagnetic garnet ceramic. The density of the paramagnetic garnet ceramic is preferably greater than or equal to 90%. The garnet ceramic is preferably a gadolinium gallium garnet ceramic or an ytterbium gallium garnet ceramic.
Claims21
A magnetic cooling device comprising
- a magnetocaloric element, the magnetocaloric element comprising a paramagnetic garnet, the paramagnetic garnet being a ceramic;
- a heat source and a cold source, the paramagnetic garnet being arranged between the cold source and the heat source;
- and
- a field generator designed to produce magnetic fields external to the field generator;
- the magnetocaloric element and the field generator being positioned and configured such that a magnetic field is applied to the magnetocaloric element;
- wherein the ceramic is selected from oxide ceramics and is a sintered ceramic comprising pores, and
- wherein a relative density of the sintered ceramic is greater than or equal to 90% and less than 100%.
A magnetic cooling device comprising a magnetocaloric element, the magnetocaloric element comprising a paramagnetic garnet, the paramagnetic garnet being a ceramic,
- wherein the ceramic is a sintered oxide ceramic comprising pores which is an ytterbium gallium garnet ceramic, and
- wherein a relative density of the sintered ceramic is greater than or equal to 90% and less than 100%.
Dependencies are inferred from the claim text.