Por defecto: 

The research has three chapters, the first one detailing the preparation of monocrystalline lithium niobate powder (LiNbO3) samples by mechanical grinding and heat treatments. The second is the formation of (white) tablets from powders, which will be used in the deposit of thin films by the radio frequency cathodic spraying method (sputtering). The last stage is related to electrical simulation for the analysis of contact behavior. The powders were obtained with the calculations of the mixture in congruent, based on the model of vacancy defects assuming the factors affecting the precursors: niobium pentoxide (Nb2O5) and lithium carbonate (Li2CO3). A three-hour effective grinding mill was used for the intention of fine powders. Heat treatment was used with a ramp of 5oC/min until it reached the temperature of 850oC for the pure phase. Structural and morphological characterizations, were performed by the X-ray Diffraction and Raman Spectroscopy techniques. In stage two, the targets will be obtained by pressing and sintering the powders; obtained will be placed inside the sputtering chamber, and films will be deposited varying the power. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) will be used for the morphological analysis of films. The electrical simulation will serve to obtain the characteristic curves of current vs voltage and current vs capacitance, and define whether the films behave as an ohmic contact or a Schottky contact, thus fulfilling the objective of this research. The results of morphological and structural characterization confirm the obtaining of the crystalline phase of lithium niobate, indicating that the material is optimal for the realization of the pills (the white).