The silicon colloidal sol precipitates on the surface of FSY and seems to migrate more easily than other nonframelVork silicon do.

• 研究表明，添加的硅溶胶可能沉积在分子筛外层，在水热处理时可能较易发生固相迁移而改进了水热稳定性，进而改善了催化活性。