The crack-free lithium ion injection into alkali silicate glass below the glass transition temperature, which is difficult by conventional ion exchange using a molten salt, was achieved by means of the solid state electrochemical technique using Li+ conducting microelectrodes. The fundamental doping system consists of an anode/LiLaSiO4 microelectrode/glass/Na- β″-Al2O3/cathode system, where the Li + in LiLaSiO4 is injected into the glass under an applied electric field, then the Na+ in the glass was eliminated from the glass to Na-β″-Al2O3. As expected, the crack development strongly depended on the applied voltage, and was suppressed under a lower voltage. Furthermore, it was confirmed that the post annealing after doping is also effective for fabrication of a crack-free doped glass. The breaking mechanism of the glass was mainly discussed by the distinction of the ionic radius between the dopant and mobile cation in the glass.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics