Method for preparing long-life light-emitting phosphor and a long life-visible light emitting phosphor obtained by the process

摘要

the subject of the invention is to develop a new method of synthesis and receive new long life luminoforu emitting visible light with a green or orange, doped ions europu demonstrating emission long life with excited in the uv range, ne aruv and vis.process to obtain a long life luminoforu emitting visible light by a homogenisation silica with other typical reagentami transacted in the known mechanical gas mixing piece is characterized by the fact that in the technological kwasoodpornym can in mieszad oh, shall be drawn up at about 313u00b0 k solution of surfactant at a concentration of preferably 60% by weight,what is it with the nature of zolu mixture precursors, silicon (si) in the form of tetraetoksysilanu (tmos), and titanium (ti) as precursors: tetraizopropoksydu titanium (tipot) or zirconium (zr), used as tetrapropoksydu zirconium, in such quantity to obtain the ratio of the number of moles si / ti (zr) = 10, 20, 40, in aqueous hydrochloric acid at a concentration of 2 m.leads to homogenisation by mixing with physical control and control of acid ph, which leads to the level of preferably between 7.2 - 7.8 ph by adding an aqueous solution of ammonia (nh3 aq).is subsequently received modified silica by hydrothermal treatment of a suspension in its hot soak temperature 373u00b0 k time shorter as 24 h, after which the prepared suspension forms a filter.odsu0105cza to deposit opadowo with excess of surfactant and residues posyntezowych and shall kropelkowym shower washing water and the osu0105czeniu opadowym, placed him in the dryer at a temperature 333u00b0 k in time approximately 12 h after this time performed his kalcynacju0119 furnace przepu0142ywowym.so the modified silica in the form of mezoporowatej (sba - 15), breaks up with other reagentami in ball mill, after which the so obtained input directs to high temperature synthesis in tubular furnace, operated in the temperature from 1100u00b0c to 1300u00b0c, maintained by the time mywany ranging from 3 h to 5 h in a reducing atmosphere (5% by volume. h2 in n2).long life phosphor emitting visible light is characterized by the fact that it is europem silicate activated alkaline earth ions doped titanium or zirconium with formula: (sr, ca, ba) 2 - xeuxsi1 s (ti, zr) yo4.