Conclusions
Two sapphire substrates were successfully joined through a
BaTiAl6O12 thin film deposited by pulsed laser deposition on one of
the substrates.For this,a BaTiAl6O12 crystalline target was synthesized and its fluorescence is presented for the first time.The
bonding was accomplished by irradiating a predefined pattern
using a ns laser.Upon laser irradiation,aluminum from the upper
substrate is in corporated in the glass melt.After annealing at
950 °C for 30 min a strong luminescence was observed from the
laser irradiated structure,which was not observed before the annealing, and which in tensity is higher than that of the crystalline
BaTiAl6O12 PLD target.The presence of crystalline BaTiAl6O12 together with Ti:Al2O3 centers in the glass solder are the responsible
of this luminescence.The average tensile stress of the bonded
samples is 13 MPa.