Optical properties of potassium aluminum phosphate glass activated by trivalent titanium ions

Potassium aluminum phosphate glass activated by trivalent Ti ions was obtained and investigated. Some physicochemical properties of the concentration series prepared, as well as the absorption and luminescence spectra at 293 K, were investigated. The data obtained are indicative of distorted octahedral coordination of Ti³⁺ ions. The optimal concentration interval for Ti³⁺ in the glass is proposed: 0.1–1 mol/l, in which the titanium concentration can be varied without violation of the physicotechnical and luminescence-kinetic properties of the glass. As a result, Ti³⁺ can be optimally used as an activator for phosphors on its basis. In addition, the sensitizing properties of Ti³⁺ can be used to excite other ions: Ho³⁺, Er³⁺, and Yb³⁺.