Preparation method of capillary core material for flat plate type loop heat pipe

The invention provides a preparation method of a capillary core for a flat plate type loop heat pipe, the capillary core prepared by the method has a hierarchical pore structure, and is mainly characterized in that a high-porosity capillary core material is prepared by a loose sintering method, so that the liquid absorption performance of the capillary core material is improved; therefore, the capillary core is ensured to provide higher capillary pressure for the loop heat pipe during operation, and the loop flow resistance is reduced. The capillary core for the flat plate type loop heat pipe is prepared by adopting a powder loose packing sintering technology, multi-stage pore structure forming is realized by adding a pore forming agent into a raw material of the capillary core, the capillary core prepared by the method is controllable in deformation quantity and small in later processing amount, the processed capillary core can be directly put into a loop heat pipe evaporator for use, the preparation method