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Schematic diagram of the manufacturing process on the mushroom-shaped wick by multi-step sintering. (a) Pouring of the mushroom-shaped cap particles into the second mold; (b) alignment of the columnar posts wick on the top upon mechanical pressure; (c) the mushroom-shaped posts’ wicks were released from the second mold; (d) manufactured mushroom-shaped posts’ wicks with lp of pitch [27].
