Method for carrying out phosphide in-situ injection synthesis by carrier gas

A method for carrying out phosphide in-situ injection synthesis by carrier gas, characterized by comprising the following steps of:

• step A, introducing shielding inert gas into a furnace body through a carrier gas intake conduit, and stopping introducing the shielding inert gas when the pressure in the furnace body reaching a preset pressure is detected;
• step B, heating a crucible in the furnace body to melt a pre-synthesized raw material in the crucible until the temperature required for phosphide synthesis is reached;
• step C, introducing the carrier gas into the furnace body through the carrier gas intake conduit, and meanwhile opening and adjusting a carrier gas exhaust conduit to enable the injection amount of the carrier gas to be equal to the outflow amount of the gas;
• step D, moving a phosphorus source furnace loaded with red phosphorus downwards until an injection conduit of the phosphorus source furnace is submerged in the melt and lowered close to the bottom of the crucible;
• step E, heating the red phosphorus with the phosphorus source furnace to produce phosphorus gas, and mixing the phosphorus gas with the carrier gas and then injecting it into the melt through the injection conduit, and the phosphorus gas reacts with the melt to synthesize phosphide;
• and
• step F, after the synthesis is finished, slowly lifting and turning off the phosphorus source furnace and then stopping introducing the carrier gas into the furnace body, and finally stopping heating the crucible;
• wherein, in step A, the carrier gas intake conduit is communicated with the phosphorus source furnace, and the shielding inert gas enters the furnace body through the carrier gas intake conduit and the phosphorus source furnace.