METHOD OF INCREASING LUMINOUS INTENSITY OF ALUMINATE LUMINOPHORES Russian patent published in 2009 - IPC C09K11/64 C09K11/80 

FIELD: chemistry.

SUBSTANCE: invention can be used for making dyes, plastics, resins, glass and ceramic objects, cements, adhesives, fibres, yarn. Aluminate luminophores, which are a matrix based on aluminium oxide and oxides of at least one element chosen from: Mg, Ca, Sr, Ba, Zn, Si, activated by at least one rare-earth element, are treated with aqueous solutions of monosubstituted phosphates at pH 6 at the beginning and pH above 7 at the end of treatment or solutions of agents chosen from: H₂SO₄, H₃PO₄, monosubstituted phosphates, mixture of tri- or disubstituted phosphates with at least one acid from: HCl, H₂SO₄ or HNO₃ at pH 1 at the beginning and pH not above 4 a the end of treatment. The oxide matrix can have formula: MO-SiO₂-Al₂O₃: R, MAl₂O₄:R, -MAlO₄:R, Sr₄Al₁₄O₂₅: R, where M - is a metal, chosen from: Ca, Mg, Sr, Ba, Zn; R - at least one rare-earth metal, chosen from a group consisting of Dy, Nd, Eu, Tm, Tb, Y,Yb.

EFFECT: invention increases luminous intensity of aluminate luminophores without reducing hydrolytic stability.

5 cl, 3 tbl, 27 ex