Nano inorganic composition and coating method using same

A nano-inorganic composition, comprising:

• at least one of sodium oxide (Na2O), potassium oxide (K2O), and lithium oxide (Li2O), all of which are alkali metal oxide (M2O), as represented by Formula 1;
• an inorganic acid compound:
• water (H2O);
• and
• at least one of a dispersant, a catalyst, and a surfactant:
• (x1Na2O+x2K2O+x3Li2O)·ySiO2·nH2O [Formula 1]
• wherein x1 is the number of moles of Na2O;
• x2 is the number of moles of K2O;
• x3 is the number of moles of Li2O;
• x1, x2, x3>=0;
• x1<=x2+x3;
• x1+x2+x3=X wherein X is the number of moles of the alkali metal oxides (M2O), and X>0;
• y is the number of moles of silica, and y>=X;
• and
• n is the number of moles of water;
• and n is a natural number from 1 to 20;
• wherein the nano-inorganic composition comprises 0.1-10 parts by weight of (M2O+ySiO2), 0.01-2 parts by weight of the inorganic acid compound, and the remaining parts by weight of water and the at least one of the dispersant, the catalyst, and the surfactant;
• and
• the pH of the nano-inorganic composition is from 11 to 13.