Sol with higher alumina content with a ratio 1/25 of ASB/H2O can be prepared by adding polyvinylpyrrolidone(PVP) with EAcAc.

• 向EAcAc改性Al_2O_3溶胶中引入聚乙烯吡咯烷酮(PVP)分子，可获得ASB：H_2O为1：25的更高固含量的铝溶胶。