35results about How to "High afterglow brightness" patented technology

The present invention relates to a white light LED which has a high lighting efficiency, a good color displaying capability and has a plurality of afterglow colors or light storing capability. The present invention adopts at least two white light LED which have different peak value wave lengths and launching spectral and adjusts the two weights of the two fluorescences through the white LED to get the white LED lighting device which has a good color displaying capability, a high lighting efficiency, a plurality of afterglow colors and times.

The invention discloses a inverse spinel structure magnesium stannate green long persistence phosphor to prepare Mg2SnO4 as substrate and Mn2+ as activating ion activate by bivalent manganese ion, which comprises the following steps: adopting MgO and SnO2 as substrate; blending Mn2+ ion; adding Mn(CH3COO)2 .4H2O; setting the quantity of doping agent at 0.005-1 percent mole; weighing MgO and SnO2 according to 2:1 molar proportion; putting 0.005-1 percent mole activator in the pot; setting igniting temperature at 950-1250 deg.c for 1-3 h; setting active carbon as reducer; fetching the reactor out of furnace; cooling in the air to produce almost white product; luminating the product through 254 nm ultraviolet lamp to see green long persistence phosphor; displaying the best effect when the doping quantity of Mn2+ is at 0.2-0.3 percent and color coordination of x is 0.0875 and y is 0.6083.

A fired product having a luminous function is manufactured by: adhering material-adapting glass frit to a surface of a ceramic material; adhering coating glass frit to the surface of the material-adapting glass frit after drying of the material-adapting glass frit; adhering luminous material particles having a particle size of 50 to 250 μm in one uniform layer to the coating glass frit layer before drying of the coating glass frit so that the upper portions of the luminous material particles are partly exposed from the coating glass frit; alternately stacking coating glass frit and luminous material particles several times; covering the topmost luminous material particles partly exposing from the coating glass frit by adhering coating glass frit; printing an image portion on the surface of the coating glass frit after drying of the coating glass frit; adhering adapting glass frit at a predetermined thickness to the coating glass frit having the printed image portion; uniformly adhering protecting glass frit particles having a large particle size to the surface of the adapting glass frit; and firing the adhered stack at high temperature, wherein the material-adapting glass frit has a coefficient of thermal expansion of an intermediate value between those of the ceramic material and the luminous material particles, the coating glass frit has a coefficient of thermal expansion substantially the same as that of the luminous material particles, and the adapting glass frit has a coefficient of thermal expansion of an intermediate value between those of the luminous material particles and the protecting glass frit particles having a large particle size. This fired product is used in an image forming part of an evacuation route guiding sign device as a fired product layer.

A waterproof and thermal resistant high luminosity long persistence fluorescent powder is produced by: using europium (Eu2+) and dysprosium (Dy3+) as activators and magnesium and strontium aluminate as matrix. It contains two steps i.e. first, preparing fluorescent powders, second, covering jargonia and triethanolamine on it. The products are of high luminosity, long persistence, liquidity, good resistance to effect of heat and water and dispersed easily. The process is facility and operated-friendly.

A wind-energy long afterglow luminescence device comprises a casing (1), a wind power mechanical structure (2), a power generation device (3), LED luminous bodies (4) and a long afterglow luminous body (5); the power generation device (3) is connected with the wind power mechanical structure (2) and the LED luminous bodies (4) via lines respectively; and the wind power mechanical structure (2), driven by wind power, enables that the power generation device (3) drives the LED luminous bodies (4) to emit light and excites the long afterglow luminous body (5) to emit light. Power is used once being generated, the power transmission loss and using cost are reduced, the problem that a common wind energy luminescence device is hard to emit light continuously with minimal brightness without routine power supply or under a power off condition is solved, uninterrupted light emission is realized, and the minimal brightens of afterglow luminescence is improved greatly compared with a traditionallong afterglow luminescence; and a speed change mechanism can be used to improve the wind power generation efficiency further, a photovoltaic device can be combined, and wind and photovoltaic hybrid power supply is used to improve the safety of light emission.

The invention discloses a polrvinyl chloride/ strontium europium aluminate photoluminescence sheet, belongs to luminous materials, and in particular relates to a rare-earth macromolecule photoluminescence materials. The polrvinyl chloride/ strontium europium aluminate photoluminescence sheet comprises the following components in percentage by weight: 84 to 86 of polrvinyl chloride resin, 4 to 8 of strontium europium aluminate luminous powder and 7 to 10 of auxiliary material. The invention provides the polrvinyl chloride/ strontium europium aluminate photoluminescence sheet which has the advantages of easy processing, lower cost and stable performance and a processing method thereof, which solve the problem of difficult processing shaping, high price and the like of inorganic materials and low stability of rare-earth organic micromolecule coordination compounds. The sheet has high afterglow luminance, the initial luminance is more than 2,000mcd/m<2>, and the initial luminance is more than 200mcd/m<2> for 10 minutes, more than 50mcd/m<2> for 60 minutes and 20mcd/m<2> for 120 minutes, and the afterglow time is long, which is over 12 hours. The polrvinyl chloride/ strontium europium aluminate photoluminescence sheet is applied to concealed lighting and emergency lighting, and meter panels of passenger vehicles and freight vehicles for aviation, voyage and land, building decoration and plates of roads, docks, common facilities, paths and dangerous label marks.

The invention provides an epoxy long-afterglow fluorescent anti-skid adhesive and a preparation method of the epoxy long-afterglow fluorescent anti-skid adhesive. The fluorescent antiskid adhesive comprises a component A and a component B, the component A comprises epoxy resin, a long afterglow material and a filler, the component B comprises an epoxy resin curing agent, and the long afterglow material is obtained by mixing a rare earth silicate-based long afterglow material and a rare earth aluminate-based long afterglow material according to the weight ratio of 1: 3-3: 1. The fluorescent anti-skid adhesive provided by the invention overcomes the problem of poor water resistance of a rare earth aluminate-based long afterglow material, and has the advantages of very good stability, very good fluorescent effect, high afterglow brightness and long lasting time.

The invention discloses a preparation process of a luminescent ceramic tile and the luminescent ceramic tile. The preparation process comprises the following specific steps: S1) preparing luminescent powder; S2) preparing sodium silicate sol; S3) adding the luminescent powder into the sol while stirring, further performing stirring uniformly, and performing drying to obtain luminescent powder sol particles; S4) preparing a glaze material: uniformly mixing the glaze and the luminescent powder sol particles in proportion, and then applying the mixture on the surface of a ceramic tile green body to obtain a luminescent green body layer; S5) applying glaze powder on the surface of the luminous green body layer, and putting the luminous green body layer into a press for compression molding to obtain a green body; S6) putting the polished green body into a kiln for firing, preserving heat, and then cooling along with the furnace to obtain the luminous ceramic tile. And the particle size D50 of the luminescent powder sol particles is 5-8.5 microns. The invention further provides the luminous ceramic tile prepared by the preparation process of the luminous ceramic tile, and the prepared luminous ceramic tile is good in luminous intensity and long in afterglow time.

The invention provides a long-afterglow luminescent material. The long-afterglow luminescent material is shown as a chemical formula (I): K1-x-y-z-a-bLiaNabGa1-cAlcGe1-dSidO4:xBi<3+>, yM<2+>, zR<3+>, wherein M refers to one or more of Mg, Ca, Sr, Ba and Zn, R refers to one or more of Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, x is not less than 0.0001 and not more than 0.20, y is not less than 0 and not more than 0.20, z is not less than 0 and not more than 0.20, a is not less than 0 and not more than 0.20, b is not less than 0 and not more than 0.20, c is not less than 0 and not more than 0.20, and d is not less than 0 and not more than 0.20. The long-afterglow luminescent material has the advantages that Bi<3+> ions are taken as activation ions and can be activated effectively by ultraviolet light to produce cyan-blue adjustable long afterglow, so that after-glow brightness is high and after-glow lasting time is long.

The invention provides a color-adjustable long-afterglow material. The long-afterglow material has the chemical formula shown in formula I: CaxSr(1-x)GayAl(4-y)O7:zMn<2+>, wherein x is larger than orequal to 0 and smaller than or equal to 1, y is larger than or equal to 0 and smaller than or equal to 4, and z is larger than 0 and smaller than or equal to 0.04. The long-afterglow material can realize color adjustment finally by changing part of components of single doping ions in single matrix. The long-afterglow material has higher afterglow brightness and long afterglow time. Afterglow in various colors can be obtained through blending of the matrix while doping elements are not changed in the experiment. Meanwhile, a preparation method of the long-afterglow material is simple, raw materials are cheap and easy to obtain, and the stability of the material is good. The invention also provides the preparation method of the color-adjustable long-afterglow material.