Polycrystal Li2B4O7 doped with Cu and In was prepared and then sintered at different temperatures. X ray diffraction (XRD)
thermoluminescence (TL) and optical stimulated luminescence (OSL) were applied to investigate the bleach of the samples. It was found that the sintering temperature strongly affects the bleach of TL traps in the samples
and the 750℃ is the optimum sintering temperature
which results in the minimum bleach. An explanation was given for the sintering temperature effects on bleach.