Glass with high hardness and toughness and preparation method thereof

The invention discloses glass with high hardness and toughness and a preparation method thereof. The glass comprises the following raw materials by weight percentage: 54% to 62% of silicon dioxide (SiO2), 16% to 22% of boron oxide (B2O3), 10% to 16% of alumina (Al2O3), 4% to 8% of calcium oxide (CaO), 6% to 10% of sodium oxide (Na2O), 2% to 6% of magnesium oxide (MgO), 3% to 8% of a clarifying agent, 1% to 4% of a colorant, 0.06% to 0.1% of rare earth oxide and 3% to 14% of polyvinyl butyral. The glass with high hardness and toughness and the preparation method thereof have the advantages thatthe ratio of the whole materials is favorable for improving the use strength and toughness of the glass, the addition of boron oxide (B2O3) ensures the improvement of the hardness of the whole glass,and boron oxide is a material capable of increasing the service life of the whole glass; compared with the previous glass, the glass is prepared with a double-layered sandwiching method, so that theproblem of easily cutting t