The alkaline earths metal alumina silicate afterglow fluorescent powder which is activated by the rare earth element

摘要

As for the alkaline earths metal alumina silicate afterglow fluorescent powder which is activated by the rare earth element by this invention, early brightness is high, it possesses the excellent feature that afterglow time is long. That powder is neutral regarding water medium, it pulverizes any sinterring things easily and because it can make the powder, the luminescent plastic, it can be used by the production of the rubber, the paint and the ceramic membrane easily. As for compound chemical formula of that powder MO.aAl 2O3bSiO 2cL: It is fX, MO is displayed by the oxide of the kinds which are selected from the alkaline earths metal such as SrO, CaO and MgO at least, L is the mineral medicine which is selected from the ore, X is the rare earth activation medicine which is selected from the rare earth element, a and b, c, f is the fluctuation primary factor which is displayed at the number of mols. That powder 2-4 time burns at temperature of 1200 degree of degree -1450 the component material which is sorted, in the environment where the inside of the vapor or the restoration vapor of the element is controlled, obtains sinterring ones. The sinterring ones become the afterglow fluorescent powder finally.