Research on Mechanical Property of Single Panel Fire-Resistant Glass with Cs+ Ion and Rb+ Ion Exchange

The effect of Cs⁺ ion and Rb⁺ ion in the molten salt of different proportion on the single panel fire-resistant glass is discussed in this paper. The single panel fire-resistant glass was prepared by the method of ion-exchange, with proper amount of additives and adding KNO₃ and CsNO₃ , KNO₃ and RbNO₃ as the main part of molten salt. The proportion of the molten salt was changed separately, a contrast test was performed to measure the flexure strength. The results indicated that the flexure strength of the single panel fire-resistant glass increased firstly and then stabilized as the ratios of w(CsNO₃)/w(KNO₃) and w(CsNO₃)/w(RbNO₃) increased respectively. With the ratio of w(CsNO₃)/w(KNO₃) =1.5%, the mechanical property of the single panel fire-resistant glass was proper and the maximum flexure strength was 274 MPa. In the case of RbNO₃, the flexure strength of single panel fire-resistant was 244 MPa with the ratio of w(CsNO₃)/w(KNO₃) = 0.3%. According to the research, it is found that the method of ion-exchange of Cs+ and Rb+ into plain glass to prepare single panel fire-resistant glass is feasible, the sample melted under the condition of 1 hour and 780 without any trace of thermal explosion.