NANO-STRUCTURE YTTRIUM ALUMINUM GARNET BASED TRANSPARENT CERAMIC MATERIAL, PREPARATION METHOD THEREFOR AND USES THEREOF

摘要

A nano-structure YAG based transparent ceramic material, a preparation method therefor, and uses thereof. The transparent ceramic is of a nanocomposite structure consisting of YAG and Al₂O₃; and the grain sizes of both YAG crystalline phase and Al₂O₃ crystalline phase are less than 100 nm. The YAG based transparent ceramic is prepared by carrying out heat treatment to an amorphous bulk glass precursor; during the heat treatment, a part of aluminum oxide in the bulk glass precursor reacts with yttrium oxide to generate a YAG crystalline phase; and the generated YAG crystalline phase and the remaining aluminum oxide crystalline phase construct a nanocomposite structure. The YAG based transparent ceramic material has a hardness and an elastic modulus comparable even superior to those of a YAG single crystal, is optically transparent within a waveband range from visible light to middle infrared light, and has excellent photoluminescence performance after being doped with luminous active ions.