PROCESSES FOR PREPARING COLOR STABLE MANGANESE-DOPED PHOSPHORS

• Main Author: MURPHY JAMES EDWARD
• Format: Patent
• Language: English; Korean
• Published: 27.04.2016
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; BLASTING; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

아래 화학식(1)의 Mn도핑된 인광체의 색 안정성을 개선시키기 위한 저-HF 또는 무-HF 공정은, 화학식(1)의 인광체를 6플루오로 규산을 포함하는 용액에 접촉시키는 단계, 및 상기 화학식(1)의 처리되지 않은 인광체에 대해 개선된 색 안정성을 갖는, 화학식(1)의 처리된 인광체를 격리시키는 단계를 포함하며, A[MF]:Mn...(1) 상기 식에서 A 는 Li, Na, K, Rb, Cs, R, 또는 그 조합물이고, 상기 M 은 Si, Ge, Sn, Ti, Zr, Al, Ga, ln, Sc, Y, La, Nb, Ta, Bi, Gd, 또는 그 조합물이며, 상기 R 은 H, 저급 알콜, 또는 그 조합물이고, 상기 x 는 [MF]의 절대 전하값이며, 상기 y 는 5, 6, 또는 7 이다. Low-HF or HF-free processes for improving color stability of a Mn+4 doped phosphor of formula I include contacting the phosphor of formula I with a solution that contains hexafluorosilicic acid, and isolating a treated phosphor of formula I having improved color stability relative to an untreated phosphor of formula I Ax[MFy]:Mn+4  (I) wherein A is Li, Na, K, Rb, Cs, R4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7.