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Capillary-porous materials are intended for making "wicks" for loop heat pipes. Such wicks, possessing a certain configuration, ensure the creation of the capillary head required for pumping the working fluid inside a loop heat pipe. The main advantages of such materials are a small effective pore radius in combination with high porosity and permeability.
Fine-pored wicks made of such materials make it possible to raise the working fluid to a height of several meters and ensure an efficient heat transfer downwards.