LIGHT TRANSMITTING LUTETIUM OXIDE SINTERING PRODUCT AND PROCESS FOR PRODUCING THE SAME

摘要

The present invention provides a lutetium oxide sinter to which yttrium is added in an amount of 100 mass ppm to 7000 mass ppm, whose average particle size is from 0.7 to 20 µm, and with which there is no precipitation of a hetero phase containing yttrium at the grain boundary.