Apparatus and method for producing Mg(2)Si(1-x)Sn(x) polycrystal

摘要

Provided are an apparatus and a method for producing an inexpensive Mg2Si1-xSnx polycrystal that can be effectively used as thermoelectric conversion materials that can be expected to have a high performance index by doping if necessary.;A problem can be solved by a production apparatus 1 for producing an Mg2Si1-xSnx polycrystal including at least a reaction vessel for synthesis of Mg2Si1-xSnx represented by the following formula (1) by filling a mixture of Mg particles and Si particles or Mg particles and Sn particles, or Mg—Si alloy particles or Mg—Sn alloy particles as a main starting material 2 to cause a reaction; an inorganic fiber layer 6 which is fixedly provided above the starting material 2 filled into the reaction vessel 3 and has air permeability, which can be caused to disappear by a product 7 generated by chemical reaction of vaporized Mg with oxygen during the synthesis of the polycrystal 12; heating means 8 for heating the reaction vessel 3; and control means 9 for controlling the heating temperature and heating time of the reaction vessel 3, wherein
Mg2Si1-xSnx  (1)(in the formula (1), x is 0 to 1).

主权项

1. An apparatus for producing an Mg2Si1-xSnx, polycrystal, comprising at least:
a reaction vessel for synthesizing an Mg2Si1-xSnx polycrystal represented by the following formula (1) by charging a mixture of one of Mg particles and Si particles, or Mg particles and Sn particles, or Mg—Si alloy particles, or Mg—Sn alloy particles, or Mg particles and Si particles and Sn particles as a starting material to cause a chemical reaction; an inorganic fiber layer which is fixedly provided above the starting material charged into the reaction vessel and is permeable to air, until a product of MgO and Mg—Si—O generated by chemical reaction of vaporized Mg with residual oxygen and oxygen in inorganic fibers blocks oxygen permeation through the inorganic fiber layer during the synthesis of the polycrystal; heating means for heating the reaction vessel; and control means for controlling a heating temperature and heating time of the reaction vessel,
Mg2Si1-xSnx  (1) in the formula (1), x is 0 to 1.