摘要:
A process for preparing a color stable Mn 4+ doped complex fluoride phosphor of formula (I) includes: A x (M (1-m) , Mn m ) F y ; contacting a first aqueous HF solution comprising (1-m) parts of a compound of formula H x MF y , and a second aqueous HF solution comprising m*n parts of a compound of formula A x [MnF y ], with a third aqueous HF solution comprising (1 -n) parts of the compound of formula A x [MnF y ] and a compound of formula A a X, to yield a precipitate comprising the color stable Mn 4+ doped complex fluoride phosphor; wherein A is Li, Na, K, Rb, Cs, NR 4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; X is an anion; a is the absolute value of the charge of the X anion; x is the absolute value of the charge of the [MF y ] ion; y is 5, 6 or 7; 0
摘要翻译:制备式I的颜色稳定的Mn4 +掺杂复合氟化物荧光体的方法包括与包含(1-m)份式H x M F y的化合物的第一HF水溶液接触的M 1(M(1-m),M nm) 和包含m * n个分子式Ax [MnFy]化合物的第二HF水溶液与包含(1-n)份式Ax [MnF y]化合物和式AaX化合物的第三HF水溶液 以产生包含颜色稳定的Mn4 +掺杂的复合氟化物荧光体的沉淀物; 其中A为Li,Na,K,Rb,Cs,NR4或其组合; M是Si,Ge,Sn,Ti,Zr,Al,Ga,In,Sc,Hf,Y,La,Nb,Ta,Bi,Gd或它们的组合; R为H,低级烷基或其组合; X是阴离子; a是X阴离子电荷的绝对值; x是[MFy]离子的电荷的绝对值; y为5,6或7; 0
摘要:
A process for preparing a Mn+4 doped phosphor of formula: Ax [MFy]:Mn+4, includes gradually adding a first solution to a second solution and periodically discharging the product liquor from the reactor while volume of the product liquor in the reactor remains constant; wherein A is Li, Na, K, Rb, Cs, 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; x is the absolute value of the charge of the [MFy] ion; y is 5, 6 or 7. The first solution includes a source of M and HF and the second solution includes a source of Mn to a reactor in the presence of a source of A.
摘要:
A phosphor composition is disclosed. A phosphor composition, comprises at least 10 atomic % bromine; silicon, germanium or combination thereof; oxygen; a metal M, wherein M comprises zinc (Zn), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), or combinations thereof; and an activator comprising europium. The phosphor composition is formed from combining carbonate or oxides of metal M, silicon oxide, and europium oxide; and then firing the combination. A lighting apparatus including the phosphor composition is also provided. The phosphor composition may be combined with an additional phosphor to generate white light.
摘要:
A process for preparing a color stable Mn4+ doped complex fluoride phosphor of formula I includes Ax(M(1−m), Mnm)Fy (I) contacting a first aqueous HF solution comprising (1−m) parts of a compound of formula HxMFy, and a second aqueous HF solution comprising m*n parts of a compound of formula Ax[MnFy], with a third aqueous HF solution comprising (1−n) parts of the compound of formula Ax[MnFy] and a compound of formula AaX, to yield a precipitate comprising the color stable Mn4+ doped complex fluoride phosphor; wherein A is Li, Na, K, Rb, Cs, NR4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; X is an anion; a is the absolute value of the charge of the X anion; x is the absolute value of the charge of the [MFy] ion; y is 5, 6 or 7; 0
摘要:
A phosphor composition is presented. The phosphor composition includes a first phosphor that includes a phase of general formula (I): L3ZO4(Br2-nXn): Eu2+(I) wherein 0 ≤ n ≤ 1; L is Zn, Mg, Ca, Sr, Ba, or combinations thereof; Z is Si, Ge, or a combination thereof; and X is F, Cl, I, or combinations thereof. A lighting apparatus that includes a light source and the phosphor composition radiationally coupled to the light source is also presented.
摘要:
A lighting apparatus comprising a semiconductor light source and a color stable Mn 4+ doped phosphor of formula K 2 SiF 6 :Mn 4+ , wherein % intensity loss of the phosphor after exposure to light flux of at least 80 w/cm 2 at a temperature of at least 50ºC for at least 21 hours is ≤ 4%.
摘要:
Coating systems suitable for use in generating fluorescent visible light, and lamps provided with such coating (22) systems. The coating systems includes a phosphor-containing coating that contains at least a first phosphor that is predominantly excited by ultraviolet radiation of a first wavelength to emit visible light and absorbs but is less efficiently excited by ultraviolet radiation of a second wavelength. The coating system further includes a second phosphor that absorbs the ultraviolet radiation of the second wavelength and little if any of the ultraviolet radiation of the first wavelength.
摘要:
A process for synthesizing a color stable Mn4+ doped phosphor includes contacting a precursor of formula I, in gaseous form at an elevated temperature with a fluorine-containing oxidizing agent to form the color stable Mn4+ doped phosphor Ax[MFy]:Mn4+ I wherein A is Li, Na, K, Rb, Cs, NR4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, 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.