Focus on the several YAG powder preparation methods:solid-phase reaction method,the gas-phase chemical method, co-precipitation method,solvothermal method,sol-gel method;discuss the advantages and disadvantages of various method;and point out that the method is of the most potential to industrialization,which bases on yttrium-alkoxide,aluminum-alkoxide and sol-gel meth.

The homogeneous and transparent gel glasses were successfully synthesized by applying the following measures: ① partially hydrolyzing silican tetraethoxide before mixing with the other alkoxides; ② forming a double metal barium ethoxide; ③ selecting suitable mixing sequence.

In this dissertation, the liquid alkoxide at room temperature is synthesized using alcohol and aluminum as raw materials.

Nanoscale Sb2O3 was prepared via hydrolysis of alcoholate.

The Sb2O3 particles with an average diameter of 30-40 nm are obtained by hydrolyzation of alcoholate.

Nanometer SnO 2 powder was prepared by the hydroxylation method of metal alcoxides.

The results indicate that the hydrous alumina prepared by alkoxide-hydrolysis and hydrothermal synthesis methods are both AlOOH,and the AlOOH formed by alkoxide-hydrolysis is pseudo-boehmite.