“…Various functional coatings gradually attracted people's attention with the progress of the science and technology and the improvement of people's life standard, the insulating coatings, as one of functional coatings, have had a wide application [1]. According to the difference of binder [2][3][4], the insulation coatings are divided into organic insulating coating and inorganic insulating coating, and the latter [5][6][7][8] can be divided into alkali silicates coating, phosphate coating, concrete coating and silica sol coating and so on. Silica sol coating has been focused on because it has some advantages such as low carbon, low cost, high insulation, environmental friendliness and so on [9][10].…”