159results about How to "Long afterglow" 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 provides a long-afterglow luminescent material and a preparation method thereof. The long-afterglow luminescent material is a[Ln[2-x]O3.xRe].b[(1-y)Al2O3.yGa2O3], wherein Ln is two of Gd, Y, Lu and La, and Re is one or more of Tb, Eu, Ce, Nd, Er, Yb and Bi. Compared with the prior art, the long-afterglow luminescent material uses Ln2O3, Al2O3 and Ga2O3 as matrixes and Re as the activator to obtain the long afterglow property; the mole coefficients of the components are changed, so that the luminescent material can be excited by blue light to obtain long afterglow, and the luminescent color of the long afterglow can vary between blue green and orange. The luminescent material has the advantages of long afterglow time, high brightness, high physicochemical stability, no toxicity or harm, no radioactivity and the like, and can not do harm to the human body and environment.

The invention relates to a Mn<2+> doped yellow long-lasting phosphor material. The chemical expression of the phosphor material is Ca(2-x)Sn(2-y)Al2O9:xMn<2+>,yR<3+>, wherein x is larger than or equal to 0.002 and smaller than or equal to 0.080, y is larger than or equal to 0 and smaller than or equal to 0.120, R is one of Tb, Ce, Dy, Tm, Nd, Gd, Y, Er, La, Pr, Sm, Yb, Lu and Ho. The invention further discloses a preparation method of the phosphor material. The prepared yellow long-lasting phosphor material has the advantages of high luminescent intensity, long persistence and the like.

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.

The invention provides a long-afterglow luminescent material and a preparation method thereof. The general formula of the long-afterglow luminescent material is Ba(1-x-y)SiO3:xEu2+, yR3+, wherein R is one or more of Sc, Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, x is larger than or equal to 0.0001 and smaller than or equal to 0.2, and y is larger than or equal to 0.0001 and smaller than or equal to 0.2. The long-afterglow luminescent material regards barium metasilicate as a matrix, europium ions as activating agents and trivalent rare earth ions as auxiliary activating agents, can be effectively excited by a near infrared or visible light source to produce yellow long afterglow, and is long in afterglow time and high in luminance. The experiment result shows that the yellow long afterglow of 450 nm to 700 nm is produced after the long-afterglow luminescent material is excited, the afterglow endurance can reach 5 hours or more when the luminance is larger than 0.32 mcd/m<2>.

The invention relates to the field of luminescent materials, in particular to a preparation method of SrAl2O4:Eu<2+> and Dy<3+> long afterglow luminescent materials. The preparation method comprises the following steps: taking Al(NO3)3.9H2O, Sr(NO3)2, Eu2O3 and Dy2O3 as raw materials, H3BO3 as a fluxing agent, CO(NH2)2 as fuel, and oxalic acid as a precipitator, adjusting the pH value of mixed liquor by ammonia water; then placing the mixed liquor into a burning reaction furnace; lighting at the temperature of 500 to 800 DEG C to carry out combustion reaction; and finally obtaining the SrAl2O4:Eu<2+> and Dy<3+> long afterglow luminescent materials. The preparation method has the advantages of quick reaction, simple process, saved time and energy; the illuminant performance of the combined product is excellent; the initial illuminant brightness can achieve 19150 mcd/m<2>; and the afterglow time can achieve 216 h simultaneously.

The invention discloses Cr<3+>-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and a preparation method. The nanoparticles have the atom composition of ZnGaxCryO4, wherein x is in a range of 1.98-2.00, and y is in a range of 0.001-0.02; the particle size is 50-100 nm, 2E-to-4A2 broadband transmission of Cr<3+> is generated, the broadband transmission peak ranges from 600 nm to 850 nm, and the peak value is located at 690-715 nm. The prepared long-afterglow luminescent material has the good properties that the particle size is small, the transmission range is located in a near-infrared light zone, and the afterglow time is long. In the preparation method, the cost of raw materials is low, the method is simple and easy to implement, the reaction temperature is low, requirements for equipment are low, no byproducts are produced and large-scale popularization and utilization are facilitated.

The invention relates to a red long-afterglow luminescent material and a preparation method thereof. The chemical expression of the red long-afterglow luminescent material is (Ca1-x-y-a-b-delta SrxBay)2Nb2O7:Pra, Rb, wherein x is more than or equal to 0 and less than or equal to 0.2, y is more than or equal to 0 and less than or equal to 0.1, a is less than or equal to 0.03 and more than 0, b is more than or equal to 0 and less than or equal to 0.03, delta is more than or equal to 0 and less than or equal to 0.1, and R expresses a rare earth element and selected from one or more of La, Nd, Sm, Eu, Gd, Yb and Lu. The red long-afterglow luminescent material is synthesized in the air by adopting a high-temperature solid phase method, the red long-afterglow luminescent material has obvious red long-afterglow characteristic after being activated by ultraviolet light or sunlight, an emission peak is positioned on a 614-nanometer position, and the longest afterglow observable time exceeds 30 minutes in a dark place under naked eyes. The preparation method disclosed by the invention is simple and easy to operate and can be used for large-scale production without a reducing atmosphere. The red long-afterglow luminescent material disclosed by the invention has the advantages of stability in physicochemical property, high brightness, good monochromaticity and long afterglow time and belongs to an environment-friendly material; according to the red long-afterglow luminescent material, the matrix elements, namely Ca, Sr, Ba, Nb and O, are all tellurian rich elements, and only a small quantity of rare earth elements are adopted, so that no physical injury and environmental pollution are generated in the production and usage of the material.

The invention relates to a silicate long afterglow luminous material, which is characterized by the following: regarding the A(Sr1-aMa1)O.B(Mg1-bM2b)O.C(Si1-cM3c)O2. DR.EN:Eux.Biy.Lnz(A, B, C, D, E, a, b, c, x, y and z are mole coefficients) as a chemical composition expression; clearing 420-650nm emission spectrum and showing the blue, blue-green, green, moss green, yellow, red long after glow luminous under 500nm. The invention shining various colors, which shapes an electron trap of producing the fettering action for the electron; improves the luminous intensity of luminous materials; increasing the afterglow duration.

The invention relates to a kind of high-powered material and the preparation method, especially it is a kind of self gleamy material which spreas of itself to compose department of alumnic acid. the craft follows this, first dispense the amotate liquor of finite concentration using Eu2O3, Dy2O3 and SrCo3, then mix the liquor with Al(NO3) in finite concentration, after add quantitative additive liquor and carbamide to produce compounded liquid, heat up it above the electric fire, later, observe it till loose spumescence outcome appears, cool the outcome maturely in room temperature, porphyrize it thus product is ok. Compared with the traditional art of solid phase reaction in high temperature, the art has many advantages, for example, it saves energy and has long time and brightness of afterlight. Even using it in exterior for long time, it is not ratioactive and environmental.

The invention relates to the technical field of chemical coatings, and particularly discloses a water-based self-luminous marking coating and a preparing method thereof. The water-based self-luminousmarking coating is prepared from 35-50 parts of water-based acrylic emulsion, 5-10 parts of fluorine-carbon emulsion, 10-20 parts of water-based epoxy emulsion, 1-3 parts of a film-forming auxiliary,1-3 parts of water-based wax emulsion, 3-7 parts of a phase-change material, 10-20 parts of a nanofiller, 10-20 parts of titanium dioxide, 1-3 parts of ethyl alcohol, 0.1-0.5 part of a water-based dispersing agent, 5-10 parts of luminescent powder and 4-6 parts of deionized water. By means of the water-based self-luminous marking coating, the quick dryness, weather resistance, abrasion resistance,fouling resistance, adhesion, crack resistance and other advantages of the water-based marking coating are improved, the marking identification degree at night is improved, and traffic driving safetyis ensured.

The invention provides a yellow long afterglow light-emitting material and a preparing method thereof. The molecular formula of the yellow long afterglow material is Ca2-x-yBO3Cl: Eux, Lny, wherein Ln is one or more of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Mn; x is greater than or equal to 0.0005 and less than or equal to 0.05, and y is also greater than or equal to 0.0005 and less than or equal to 0.05; when Ln is the combination of a plurality of raw materials; and all the raw materials are blended in any ratio. The yellow long afterglow light-emitting material is prepared through the following steps of: weighing the corresponding raw materials in a stoichiometric ratio, feeding the raw materials after being ground into a reducing atmosphere environment for roasting, naturally cooling to the room temperature, and then carrying out grinding. The method for preparing the yellow long afterglow light-emitting material is simple, free of pollution and low in cost.

The invention provides a long afterglow material for simultaneous emission of visible light and near infrared as well as a preparation method thereof. The general formula of the material is as follows: A<2-a-b-c>O<2>S:aYb,bM,cT; a=0.00001-0.02, b=0.0001-0.03, c=0.0001-0.03; A is selected from one or several kinds of Y, Sc, La, Gd and Lu; M is selected from one or several kinds of Zn, Mg, Ca, Sr and Ba; T is selected from one or several kinds of V, Nb, Ta, Ti, Zr, Hf, Cr, Mo and W. The material employs Yb as a luminescent ion, M and T as codoped ions, N is a melting accelerating and catalyzing ion, so that the luminescent material can be effectively excited by ultraviolet light, and at the same time, the material can produce long afterglow luminescence of visible light and near infrared, and afterglow time is long; the product has good physical and chemical stability without toxicity and radioactivity, and does not harm human bodies and environment.

The invention relates to the field of coatings, in particular to a water-based acrylic acid energy-storage luminescent coating and a preparation method thereof. The water-based acrylic energy-storageluminescent coating comprises the following components, by weight, 20 to 30 parts of water, 0.1 to 0.3 part of dispersing agent, 0.1 to 0.3 part of a wetting agent, 0.01 to 0.1 part of an antifoamingagent, 10 to 30 parts of rare earth doped aluminate type long-acting luminescent powder, 5 to 10 parts of a luminescent powder pretreatment agent, 30 to 50 parts of an acrylic emulsion, 0 to 20 partsof a filling material, 0.2 to 0.5 part of a thickening agent A and 0.2 to 0.5 part of a thickening agent B. According to the invention, the water-based acrylic acid energy-storage luminescent coatingis prepared by limiting the compatibility of the water-based acrylic energy-storage luminescent coating, so that the hydrolysis stability of luminescent powder is improved, and the obtained water-based acrylic energy-storage luminescent coating is low in VOC content, non-flammable, safe and convenient to construct, high in paint film adhesion, good in weather resistance and high in luminescent intensity, and the afterglow time reaches 12 h or longer.

The invention provides a luminescent ceramic and a preparation method thereof, relates to a ceramic, and provides the luminescent ceramic which can continuously luminesce in a dark place, does not pollute the environment, and has good chemical stability, high luminescent brightness and long persistence after the luminescent ceramic absorbs visible light and the preparation method thereof. The luminescent ceramic can be mainly used in fire safety evacuation signs, decorative ceramics and the like. The luminescent ceramic comprises a ceramic blank or glazed ceramic, and a luminescent glazed layer on the ceramic blank or the glazed ceramic. The preparation method comprises the following steps: luminescent glaze slip preparation, in which transparent glaze powder, luminescent powder and gas phase silicon dioxide are mixed, are grinded into luminescent glaze material, and are added with glycol as a suspending medium to prepare the luminescent glaze slip; glaze application, in which the luminescent glaze layer is applied to the surface of the ceramic blank or the glazed ceramic by adopting a dipping method to obtain the glazed luminescent; heat treatment, in which the glazed luminescent ceramic is subjected to heat treatment under reductive atmosphere to obtain the final luminescent ceramic product.

The invention belongs to the technical field of coatings, and particularly relates to an energy storage type environment-friendly luminescent coating and a preparation method thereof. The film-formingsubstance of the coating is one or more selected from polyesterimide resin, polyurethane resin, organic silicon modified acrylic resin and epoxy resin and cooperates with other components, so the energy storage type environment-friendly luminescent coating is free of caking, resistant to heat and good in insulativity, and the initial luminescent brightness and afterglow time of the rare earth ionactivated strontium polyaluminate luminescent material are guaranteed; the strontium polyaluminate luminescent material activated by rare earth ions and doped with titanium dioxide and boric acid iscoated with silicon dioxide by adopting a microemulsion method, and is cooperated with other components, so luminescent pigment particles in the obtained energy storage type environment-friendly luminescent coating are good in dispersity, the initial luminescent brightness of the rare earth ion activated strontium polyaluminate luminescent material is improved, and afterglow time is prolonged; anda toughening agent is used in the energy storage type environment-friendly luminescent coating, so the aging resistance, weather resistance and scratch resistance of the energy storage type environment-friendly luminescent coating are improved.

The invention relates to nitride red long afterglow fluorescent powder and a preparation method thereof. The chemical structural formula of the fluorescent powder is as follows: L2-x-y-zSimNn: xEu, yR1, zR2(1), wherein the x is larger than or equal to 0.001 and less than or equal to 0.1; the y is larger than or equal to 0.001 and smaller than or equal to 0.05; the z is larger than or equal to 0.001 and smaller than or equal to 0.05; the m is larger than or equal to 4 and smaller than or equal to 6; the n is larger than or equal to 7 and smaller than or equal to 9; L is one of Ca, Sr and Ba; R1 is Lu or Tm; and R2 is one or a free combination of two of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er and Yb. The invention further relates to a preparation method for the fluorescent powder. According to the invention, three or more rare earth elements are adulterated; after excitation of an excitation light source stops, the afterglow time of the red long afterglow fluorescent powder is remarkably improved compared with rare earth double-doped nitride fluorescent powder, and has characteristics of stable chemical performance, environment protection and the like, and is a novel red long afterglow lighting material.

The invention discloses an energy-accumulating luminous glazed tile. The energy-accumulating luminous glazed tile comprises a substrate plate, a white glaze material primer layer and a UV energy-accumulating luminous glaze material surface layer which are sequentially connected from bottom to top, and a hard substrate is adopted as the substrate plate. A glazing technology of the energy-accumulating luminous glazed tile comprises the following steps that the white glaze material primer layer is firstly sprayed on the substrate plate, when the surface of the white glaze material primer layer is dry, the UV energy-accumulating luminous glaze material surface layer is sprayed in a shower coating mode and covers the white glaze material primer layer in a mechanical shower coating mode, the UV energy-accumulating luminous glaze material surface layer is leveled and uniformized through quick micro-mechanical vibration, and then rapid curing is performed through ultraviolet lamp irradiation. The energy-accumulating luminous glazed tile can absorb natural light or artificial light to accumulate energy, can continuously give out cold light in a dark environment for more than 12 hours and is high in luminous intensity and long in persistence time.

Embodiments of the present application disclose luminescent cement mortar and a preparation method thereof as well as luminescent concrete and a preparation method of the luminescent concrete. According to the methods provided by the invention, a light-emitting channel material is prepared, so that light can penetrate the surface of the cement mortar to reach the interior of the cement mortar, a luminescent material in the cement mortar is excited, luminescent materials at the surface and the interior of the cement mortar are utilized, the effects of the luminescent cement mortar are improved, and the afterglow time is prolonged.

The invention relates to long-afterglow fluorescent powder applied to an LED and a preparation method of the long-afterglow fluorescent powder. The general chemical formula of the long-afterglow fluorescent powder is (Al-xBx)m-yCy(D1-zEz)8-mO12, wherein A is at least one of Y, Gd, Tb and Lu; B is at least one of La and Yb; C is at least one of Ce, Pr, Nd, Sm, Eu, Dy, Ho, Er, Tm, Ti, Cr and Mn; D is Ga; E is at least one of B, Al, In and Sc; x, y, z and m represent the mole fraction of the corresponding elements; 0</=x</=0.2, 0.0001</=y</=0.2, 0</=z</=0.8, and 2.5</=m</=3.5. The preparation method adopts a two-step sintering process which uses oxidization atmosphere first and then uses reduction atmosphere to obtain the long-afterglow fluorescent powder which can be effectively excited by blue light and high in luminous intensity. The long-afterglow fluorescent powder can satisfy the application requirements of the direct current/alternating current LED, has an actual application valueand is promising in commercial prospect.

The invention discloses a near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material has a molecular formula of ABO3: Mnx, Rn and in the molecular formula, A represents La, Y or Gd, B represents Al or Ga, R represents one of rare earth elements, germanium, titanium, silicon, zirconium, cobalt, nickel, tin, chromium and iron, x is greater than or equal to 0.0001mol% and less than or equal to 50mol%, and n is greater than or equal to 0mol% and less than or equal to 50mol%. The invention also discloses a preparation method and a use of the near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material having photo-stimulated luminescence has photo-stimulated luminescence and photo-stimulated long-afterglow luminescence, realizes recycle of the long-afterglow materials and can be used for biological fluorescence labeling imaging well.