The efficiency of the process of increasing the volume concentration of hydrogen in LiNbO3 crystals of congruent composition by heating in a humid atmosphere has been studied. It is shown that pretreatment of LiNbO3 crystals in adipic acid makes it possible to significantly increase the volume concentration of hydrogen in the sample during subsequent thermochemical treatment in moist air.
AbstractUsing the method of impedance spectroscopy and optical density measurements, the diffusion of oxygen in single crystals of lithium niobate of the congruent composition after the reductive thermochemical processing is studied. The parameters describing the diffusion of oxygen in the temperature range 493–693 K are established.