Abstract: A process for manufacturing a device of heat exchanger type made of ceramic with assembled plates, includes making plates made of ceramic whereof one or more includes a fluid circuit, polishing the faces intended to be applied against one another of the plates made of ceramic, applying the polished faces of the plates against one another to produce the desired tight assembly.

Abstract: A process for manufacturing a ceramic device of the heat exchanger type includes:—shaping ceramic plates (P0-Pp) and machining these ceramic plates in the unprocessed state on at least one face, so as to produce respective flow paths (Z1A, Z1B) for a first and a second fluid,—stacking the unprocessed plates in order to form an assembly having several levels of flow,—a 1st densification heat treatment (sintering) in order to obtain a pre-assembled densified monolithic block,—a 2nd heat treatment in order to provide the seal of the assembly by migration of a meltable phase (brazing material) to the interfaces of the block.