Abstract: Alumina aerogel had been paid great attention for its unique properties. The structure and various preparation methods of alumina aerogels had been summarized in this paper. The preparation methods included alumina alkoxide one step,two steps method and addition of propylene oxide method. The addition of propylene oxide method is one of the most potential route for the synthesis of high performance alumina aerogels. Fiber-reinforced, multiple cornponent and doped aerogels were also introduced.

Key words: alumina%aerogels%preparation%composite%doped