Metal solid production method

A device for producing a metal solid, the device comprising:

• a stage on which a layer of a metal powder and a layer of a high-melting-point solid covering at least a portion of a periphery of the layer of the metal powder and having a melting point higher than the melting point of the metal powder are placed;
• a microwave irradiator configured to irradiate the metal powder, at least a portion of the periphery of which is covered with the high-melting-point solid, with microwaves to heat the metal powder, thereby sintering or melt-solidifying the metal powder;
• a high-melting-point solid placement unit configured to place the layer of the high-melting-point solid on the stage covering at least a portion of the periphery of the layer of the metal powder;
• and
• a metal powder placement unit configured to place the layer of the metal powder in a recess of the layer of the high-melting-point solid,
• wherein:
• in the at least a portion of the periphery covered with the high-melting-point solid, the metal powder and the high-melting-point solid are in contact with each other;
• and
• the high-melting-point solid includes a mixture of:
• an insulation material that has a lower degree of absorption of the microwaves than the metal powder;
• and
• an absorbent material that absorbs the microwaves in a temperature zone at least a portion of which is lower than a temperature zone in which the metal powder absorbs the microwaves.