Species and Its Application in alkali-free glass substrate of a flat panel display

The present invention discloses a kind of non-alkali glass, the alkali-free glass containing SiO, AlO, MgO, CaO, TiO and VO, with respect to the content of 100 parts by weight of SiO, AlO is 25-45 parts by weight, MgO in an amount of 1- 10 parts by weight, the content of CaO is 2-15 parts by weight, the content of 1-5 parts by weight of TiO, VO content of 0.5 to 5 parts by weight; obtained and calculated by the formula R is 7.5-12: R = 0.206 w (AlO) + 0.4w (MgO) -0.007w (CaO) + 0.2w (TiO) + 0.143w (VO). Alkali-free glass of the present invention have a high chemical stability, it can solve the problems of the prior art thin glass substrate after step the glass surface quality deterioration, it is possible to ensure that after the thinning process to achieve a target thickness of the substrate under the premise of mass of glass , to achieve light and thin flat panel display glass. Further, alkali-free glass of the present invention have a high strain point and the Young's modulus, and better performance, but also a wider range of applications.