The pore-forming agent powder may be ammonium carbonate, ammonium bicarbonate, copper sulfate, copper carbonate, copper hydroxide, ammonium nitrite, polyethylene glycol, polyvinyl alcohol, polyvinyl chloride, polystyrene, binary nitrogen-ammonia benzene, azobisisbutyromtπle, azobisformamide, urea, paraffin or methylcellulose The composite copper powder can be used for manufacturing heat pipe with inner wall capillary structure.
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