Chemical Strengthening Of Alkali-Free Glass Via Pressure Vessel Ion Exchange

This paper reports on the first successful chemical strengthening of an alkali-free glass. This is achieved via an aqueous ion exchange of barium salts under high pressure and temperature. X-ray photoelectron spectroscopy reveals that Ba2+ replaces both Ca2+ and B3+ in the glass, producing surface coe chemical strengthening for a wide range of applications, including flat panel dimpressive stress values near 200 MPa. This technology may enablsplay substrates.