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Preparation and Properties of YAG and Nd: YAG Ceramic Powders

Author: WangLiDan
Tutor: ZhangPeiPing；ZhangLiGong
School: Jilin University
Course: Materials Science
Keywords: YAG Neodymium Nanopowder Solvothermal Optical performance
CLC: TB383.3
Type: Master's thesis
Year: 2006
Downloads: 636
Quote: 0
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Abstract


Laser is one of the most famous inventions of last century. Laser technology is applied abroad in industry, agriculture, iatrology, aviation and armament of military. Since the first ruby laser came out in 1960, people research on laser material a lot. Laser materials come through the beginning in 1990s, exploring in 1970s, development in 1980s and overflying in 1990s. Fist, solid laser material includes only several crystals. Now, solid laser material includes crystal, glass and ceramic. At present, crystal and glass are still the principal parts of solid laser material. But laser ceramic suddenly rises as a new force because of its outstanding capability. And laser ceramic brings into play an important part in different fields. People attach importance to laser ceramic these years. The development of nanotechnology makes laser ceramic approach to outstanding capability. The sinter temperature of the ceramic of nanopowders as raw material is much lower than the melting point of material. The preparation period of laser ceramic is shorter than crystal growth. And the preparation cost of laser ceramic is lower than crystal growth. Nd can be doped more in laser ceramic without quenching. Big size laser can be gained using ceramic. So, laser ceramic can replace laser crystal if the properties if transparent ceramic are close to the properties of crystal.One basic characteristic of ceramic technology is molding and sintering of powders. The properties of ceramic powders as the raw material affect the quality of finally finished product. In this paper, YAG powder is synthesized successfully via a solvothermal method. And Nd:YAG powder is synthesized via this method for the first time. We discussed the synthesis characters of Nd:YAG powder and the dynamics process of solvothemal method by XRD, TEM and spectral anlysis. Several conclusion are finded.1. Well-dispersed, non-aggregater and nearly spherical fine grains (200nm on average) with a relatively narrow grain size distribution are synthesized via solvothermal method. The powder is compatible to ceramic sintering. It is confirmed that Nd and Si ions are doped into YAG lattice successfully via analysis of lattice parameter.

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