PRODUCTION OF TRANSPARENT YTTRIUM OXIDE SINTERED BODY

摘要

PROBLEM TO BE SOLVED: To provide a method capable of producing a transparent yttrium oxide sintered body at a lower cost than a conventional method and free from the necessity for severely controlling production conditions. SOLUTION: An yttrium compound which becomes yttrium oxide powder by pyrolysis or yttrium oxide powder of <=0.5μm in an average particle size of primary particles is mixed with a calcium compound which becomes calcium oxide by pyrolysis or calcium oxide powder in a range of 100 ppm or 4% based on the yttrium oxide, and the resultant powdery mixture is processed into a formed body. The obtained formed body is baked at a temperature in the range of 1400-2000 deg.C under an atmosphere whose nitrogen partial pressure is controlled.