β '-Al2O3 has a solid structure polycrystalline potassium ion conductor, its preparation, and the preparation of potassium metal by using a potassium ion conductor

摘要

PROBLEM TO BE SOLVED: To provide a solid potassium ion conductor having β"-Al₂O₃ structure, its manufacturing method, and a manufacturing method of potassium using the potassium ion conductor.;SOLUTION: The solid potassium ion conductor is obtained by embedding an polycrystalline alkali metal β"-Al₂O₃ moulding into an oxide powder containing potassium and aluminum, heating it to at least 1,100 °C at least at 100°C/Hr and, further to 1,300°C, and after maintaining for at least one hour, cooling it. The potassium metal is obtained by using potassium amalgam as a material, and by producing by electrolysis by using an anode 16 containing the potassium amalgam and a cathode 17 made of a liquid potassium metal filled inside the solid electrolyte tube 1 made of the solid potassium ion conductor, and by leading into a container 20 in an inactive atmosphere filled with paraffin, and by solidifying in a shape of a globe 23.;COPYRIGHT: (C)2006,JPO&NCIPI