Lithium containing ion exchange strengthened glass

摘要: Glasses having 59-62% by weight SiO 2 , 10-12% Na O, 4-5.5% Li 15-23% Al O 3 and 2-5% ZrO have been found to be excellent for ion exchange strengthening below the strain point exchanging lithium ions with larger alkali metal such as sodium. Such glasses possess low melting temperatures, wide working ranges, good chemical durability. The are also free from corrosive volatile components, sheets of resist devitrification when subjected subsequent bending processes.