Preparation method of single-phase mullite sol

The invention discloses a single-phase mullite sol preparation method which comprises the following steps: preparing an aluminum source mixed solution which comprises water; carrying out modification treatment on the aluminum source mixed solution; adding a silicon source into the modified aluminum source mixed solution to obtain an aluminum-silicon mixed solution; adding dilute nitric acid into the aluminum-silicon mixed solution, and adjusting the pH value to obtain the single-phase mullite sol; the single-phase mullite sol is efficiently and quickly prepared. 本发明公开了一种单相莫来石溶胶制备方法，包括以下步骤：制备铝源混合液，所述铝源混合液包括水；将铝源混合液进行改性处理；然后将硅源加入改性后的铝源混合液中，得到铝硅混合液；将铝硅混合液中加入稀硝酸，调节pH得到所述单相莫来石溶胶；实现高效快速制备单相莫来石溶胶。