25 results about "Activator (phosphor)" patented technology

A uranium-based phosphor selected from (i) phosphors having formula I or II:where the phosphor having formula I or II is doped with an activator ion including Pr3+, Sm3+, or mixtures thereof, where 0≤a≤1, 0≤b≤1, 0.75≤x≤1.25, 0.75≤y≤1.25, 0.75≤z≤1.25, 2.5≤p≤3.5, 1.75≤q≤2.25, and 3.5≤r≤4.5; (ii) a phosphor having formula I or II, where the phosphor having formula I or II is doped with an activator ion selected from Eu3+, Pr3+, Sm3+, and mixtures thereof; and a counter ion comprising one or more alkali metal ions; and (iii) phosphors having formula IIIwhere the phosphors having formula III are doped with an activator ion selected from: Eu3+, Pr3+, Sm3+, and mixtures thereof, where A is Li, Na, K, Rb, Cs, or a combination thereof.

Phosphor (1) with the general formula EA2A x (DW y G 1-y ) 10 O 13 : RE, where - EA is selected from the following group: Ca, Sr, Ba, Zn, Mg and combinations of these elements, - A and G are selected from the following group: Li, Na, K and combinations of these elements, - DW Al is, - RE is one or more activator elements, 0 ≤ x ≤ 6 , 0.3 ≤ y ≤ 0 .6 and x + 20 y = 12 ε , where ε = 0.9 − 1.1 .

A phosphor is disclosed, the phosphor having a host material including an oxide, an activator element having a rare earth element with a first valence, and a rare earth element with a second valence, the second valence being greater than the first valence. Methods of making the phosphor and radiation-emitting components are also disclosed.

This application discloses a self-luminous geopolymer inorganic coating and its preparation method. The coating comprises, by weight, 100 parts of a silicon-aluminum-rich raw material, 50-90 parts of a liquid alkali activator, 60-100 parts of a fluorescent agent, 5-20 parts of a reflective agent, and 10-30 parts of a filler. The fluorescent agent comprises phosphor particles and a coating layer located on the surface of the phosphor particles, the coating layer being composed of metal ions and acid ions. The metal ions are selected from at least one of calcium ions and magnesium ions, and the acid ions are selected from either silicate or aluminate. The coating layer is made of a material with a similar group structure to the silicon-aluminum-rich raw material, ensuring that the coating's strength development and adhesion to concrete are not affected. The phosphor particles can also be stably present over a long period of time, thereby ensuring the long-term luminescence effect of the phosphor.

A ceramic scintillator according to an embodiment of the present invention is provided with a sintered body of a gadolinium oxysulfide phosphor containing praseodymium as a main activator. When the body color of the sintered body is represented by chromaticity coordinates (x, y) based on a CIE1931 chromaticity value, the sintered body has a body color satisfying the following formulae (1) and (2). A ceramic scintillator according to an embodiment is obtained by a method for producing a ceramic scintillator, the method comprising a heat treatment step for reacting a reactant gas containing oxygen and sulfur with the sintered body. The heat treatment time in the heat treatment step is from 1 hour to 50 hours (inclusive). 0.4 < = x < = 0.505 (1) 0.83 x + 0.075 < = y < = 0.83 x + 0.095 (2).

To provide a novel phosphor.SOLUTION: One aspect of the present disclosure provides a phosphor comprising a host crystal having the same crystal structure as RbBaB7O12, and Eu2+ as an activator element. The phosphor preferably has an emission peak in a wavelength range of 435-455 nm in a fluorescence spectrum obtained upon irradiation with light having a wavelength of 266 nm. The phosphor may be represented by the general formula RbBa1-xB7O12:Eux (where x is a numerical value satisfying 0<x<1).SELECTED DRAWING: None

This disclosure relates to use of group 4 element codoping in a phosphor layer of activator-doped zinc sulfide of a display element, a display element, and a method for manufacturing a display element. The display element (100) comprises a first insulator layer (111), a second insulator layer (112), and a first phosphor layer (121) of activator-group 4 element codoped zinc sulfide between the first insulator layer (111) and the second insulator layer (112). The first phosphor layer (121) has an average atomic percentage of group 4 elements of at least 0.01 atomic percent.

A ceramic scintillator of an embodiment includes a sintered body of a gadolinium oxysulfide phosphor containing praseodymium as a main activator. When a body color of the sintered body is represented by chromaticity coordinates (x, y) based on a CIE1931 chromaticity value, the sintered body has a body color satisfying 0.4≤x≤0.505 . . . (1) and 0.83x+0.075≤y≤0.83x+0.095 . . . (2). The ceramic scintillator of the embodiment is obtained by a method for manufacturing a ceramic scintillator, the method including a heat treatment step of causing a reaction gas containing oxygen and sulfur to react with the sintered body. A heat treatment time in the heat treatment step is 1 hour or more and 50 hours or less.

The invention discloses nitric oxide orange red fluorescent powder with high luminous efficiency and large particle size and a preparation method thereof, and belongs to the field of fluorescent powder. The general molecular formula of the fluorescent powder is Ca < 1-x-y > Li < x > Al < 1-x-y > Si < 1 + x + y > N < 3-y > O < y >: zCe < 3 + >, Ce enters a crystal lattice of Ca and serves as a light-emitting element and an activating agent, 0 lt; x is less than or equal to 0.3, 0lt; y is less than or equal to 0.3, 0lt; and z < = 0.05. The fluorescent powder is sintered twice, and the second sintering is that the first sintering material and the raw materials are mixed and then sintered. The relative intensity of the fluorescent powder corresponding to an absorption peak at 25 DEG C and g = 4.215 + / -0.005 in an electron spin resonance method is 4.5 * 10 < 6 > or less. The fluorescent powder has the advantages of uniform particles, large average particle size, high quantum efficiency and high thermal stability. The method is suitable for large-scale production, and regulation and control of the particle size and uniformity can be achieved by adjusting the raw material ratio.

The present application discloses a red phosphor, and a preparation method and an application thereof and relates to the field of luminescent material technology. The chemical composition of the red phosphor is A2M(1-x)F6:xMn4+. The A is selected from at least one of alkali metal elements, and the M is selected from at least one of IVA group elements or a Ti element and a value range of the x is 0<x≤0.05. The red phosphor is granular; and a concentration of tetravalent manganese ions in a radial direction from a center of a particle of the red phosphor to a surface of the particle of the red phosphor decreases gradually. In the present application, the concentration of the activator Mn4+ in a radial direction from the center of the particle of the red phosphor to its surface is set to a descending gradient distribution to buffer the phosphor powder from the erosion of water vapor, thereby improving its anti-aging performance and prolonging the service life.

This application discloses a red phosphor, a method for manufacturing the same, and its use, and relates to the technical field of luminescent materials. The chemical composition of the red phosphor is A2M (1-x) F6:xMn 4+ (where A is at least one selected from alkali metal elements, M is at least one selected from Group 4 elements or Ti element, and the value range of x satisfies 0 < x ≦ 0.05). The red phosphor is in a particulate form, and the concentration of tetravalent manganese ions gradually decreases in the radial direction from the center of the red phosphor particles to its surface. In this application, due to the concentration of the activator Mn 4+ distributing in a descending gradient in the radial direction from the center of the red phosphor particles to its surface, the erosion of the phosphor powder by water vapor is buffered, its anti-aging property is improved, and the service life is further extended.

The invention discloses a device and a method for detecting total organic carbon by an ultraviolet coupling ultrasonic-persulfate method. The method comprises the following steps: firstly, fully mixing a to-be-detected sample with a persulfate activator, then transferring the mixed solution into a phosphoric acid solution to remove inorganic carbon in the to-be-detected sample, and then enabling the mixed solution without the inorganic carbon to enter an ultrasonic-ultraviolet microreactor; then, persulfate is activated by utilizing ultrasonic and ultraviolet energy to generate active oxygen species to convert organic matters into CO2, the generated CO2 is captured by a CO2 catcher and is transmitted to a non-dispersive infrared detector, and finally, the data of the generated CO2 is converted into the concentration of TOC in a solution by a data processor. The device is low in manufacturing cost, the detection method is wide in application range, the sample can be quickly decomposed, the anti-interference performance is high, the TOC determination effect on the high-salt organic wastewater is remarkable, and the TOC detection sensitivity can reach 0.1 microgram / L.

The invention provides an orange red fluorescent material as well as a preparation method and application thereof, and belongs to the technical field of fluorescent materials. According to the orange red fluorescent material provided by the invention, KSrBP2O8 is taken as a matrix, Sm < 3 + > and M are taken as active ions, and M is Eu < 3 + > or Si < 4 + >. The light color and the luminous intensity of the KSrBP2O8: Sm < 3 + >, Eu < 3 + > / Si < 4 + > orange red fluorescent powder provided by the invention can be regulated and controlled by changing the concentration of rare earth ions, and compared with single-doped Sm < 3 + > fluorescent powder, the double-doped KSrBP2O8: Sm < 3 + >, Eu < 3 + > / Si < 4 + > orange red fluorescent powder has higher luminous intensity and higher red purity.

The invention provides high-brightness GAYAG fluorescent powder and a preparation method thereof, and belongs to the technical field of fluorescent materials. The preparation method comprises the following steps: weighing a GAYAG fluorescent powder raw material, a cerium raw material and an activating agent in proportion; mixing a GAYAG fluorescent powder raw material and a cerium raw material, preheating to 200-300 DEG C, adding an activating agent for the first time, uniformly mixing, and preserving heat; heating to 1000 + / -10 DEG C, adding the activating agent for the second time, uniformly mixing, and keeping the temperature; raising the temperature to 1200 + / -10 DEG C, and preserving the heat; the temperature is increased to 1400-1800 DEG C, and then heat preservation is conducted Naturally cooling to room temperature; the raw materials of the GAYAG fluorescent powder comprise yttrium oxide, aluminum oxide, gallium oxide, terbium oxide, bismuth oxide and antimony oxide. The activating agent is europium oxide. Through step-by-step europium element adding, synthesis temperature control and heat treatment, the fluorescent powder brightness crystal forms a plurality of light emitting centers, the light source absorption range is increased, the fluorescent powder achieves the brightening effect, and therefore the LED lighting quality is improved.

Processes, lighting devices and particles are presented, including a host lattice material, an absorber ion and an activator ion of Eu3+, wherein the host lattice material is a transition metal with an empty d shell. Numerous other aspects are provided.

This invention relates to the field of luminescent materials technology, and more particularly to a mechanoluminescent material, its preparation method, and its application in integrated sensing. The chemical formula of the mechanoluminescent material is: Cs3GdGe3O9:xTb 3+ ,yEu 3+ ,zNa + Tb in the chemical formula 3+ As the activator, Cs3GdGe3O9 is the matrix, and Eu is used as the activator. 3+ Provides a second luminescent center, via Na + For Cs + By substituting and regulating the content and distribution of defect energy levels, the color of mechanoluminescent materials can be tunable; based on molar percentage: 0 < x < 0.5, 0 ≤ y < 0.5, 0 ≤ z < 0.5; the mechanoluminescent material prepared by the method provided in this invention exhibits monochromatic mechanoluminescent phosphor Cs3GdGe3O9:0.03Tb 3+ Utilizing lanthanide ions Eu 3+ The co-doping introduces a second characteristic emission band and cation Na + The invention addresses the shortcomings of traditional methods by replacing and regulating the color of mechanoluminescence, achieving adjustable color and a simple regulation method. The effect can be effectively adjusted by the doping concentration. The mechanoluminescent material provided by this invention has the potential to sense temperature and speed, and is expected to be applied in integrated sensing.

The present invention discloses an Sb-doped halide fluorescent material with a blue shift of fluorescence as the doping concentration increases and a preparation method thereof. The chemical formula of the phosphor is Cs2Ag 0.7 Li 0.3 In 1‑x Sb x Cl6, where x is the molar percentage coefficient of Sb element doping, and 0 < x < 0.1. By doping Sb element into Cs2Ag 0.7 Li 0.3 InCl6, a halide fluorescent material with good optical properties is obtained while maintaining the perovskite structure. The material uses Sb 3+ as the activator ion. By adjusting the doping concentration of Sb ions on the Cs2Ag 0.7 Li 0.3 InCl6 matrix, the transition of fluorescence color from yellow to green is achieved (the excitation wavelength is 335 nm). The peak emission wavelength blue-shifts from 583 nm of the x = 1% sample to about 494 nm of the x = 10% sample. It has good photoluminescence and stable color, and is widely used in light-emitting diodes (LEDs) and fluorescent materials.

A cyan phosphor with high thermal quenching properties and its preparation method and application, relating to the field of phosphors, the chemical structure of the phosphor is: Li 2‑2x Eu x Si3O4N2, where 0.01≤x≤0.05. The crystal structure of the matrix of this material belongs to the orthorhombic system, and the space group is Pmca. 2+ As an activator, under the excitation of 410nm violet light, the main peak of the emission spectrum is located at 480-490nm; at 150℃, its luminous intensity is between 95% and 98% of the luminous intensity at 25℃, so that the phosphor can be used in solar spectrum LED lighting devices excited by violet LED.

To provide an oxide phosphor, a light-emitting device, and a method for producing an oxide phosphor.SOLUTION: An oxide phosphor comprises: phosphor particles that comprise a host crystal containing Ga and oxygen, and an activating element; and first compound particles disposed on the surface of the phosphor particles. The first compound particle comprises oxide particles. The oxide particle comprises at least one first element selected from the group consisting of Group 4 elements, Group 5 elements, Group 14 elements, and Group 15 elements.SELECTED DRAWING: Figure 5

A phosphor (1) is given with the general formula EA6+w-xSE16-w+xD42-x-yEx+yN76-w-yOw+y: R, where EA is an element or combination of elements selected from the group of divalent elements, SE is an element or combination of elements selected from the group of rare earth elements, D is an element or combination of elements selected from the group of tetravalent elements, E is an element or combination of elements selected from the group of trivalent elements, R comprises an activator element, -6 ≤ wx ≤ 16, 0 ≤ x+y ≤ 42, 0 ≤ w+y ≤ 76, and 2*(6+wx)+3*(16-w+x)+4*(42-xy)+3*(x+y)-3*(76-wy)-2*(w+y) = 0. A method for producing a phosphor (1) and a radiation-emitting component (10) is further described.

A phosphor of the present invention is a phosphor containing an inorganic compound in which Eu as an activator is solid-soluted in an inorganic crystal having a crystal represented by LiBa2AlSi7N12 or the same crystal structure as the crystal represented by LiBa2AlSi7N12, in which in an X-ray diffraction pattern of the phosphor measured using a Cu-Kα ray, I1 and I2 satisfy 0<I2 / I1≤0.050 when a peak maximum intensity of a peak which is present at a position where a diffraction angle 2θ is in a range of 31.3° or more and 31.6° or less is I1, and a peak maximum intensity of a peak which is present at a position where a diffraction angle 2θ is in a range of 29.8° or more and 30.6° or less is I2.

A phosphor (1) with the molecular formula EA2-xSExSi5-xAlxN8:RE is specified, where - EA is an element or a combination of elements selected from the group of divalent elements, - SE is an element or a combination of elements selected from the group of rare earth elements, - RE is an activator element, and - 0 ≤ x ≤ 2. Furthermore, a method for producing a phosphor (1) and an optoelectronic device (10) are specified.

The present invention discloses a rare earth doped adjustable visible-near infrared dual emission phosphor and a preparation method thereof. The chemical formula of the dual emission phosphor is Sr 5.82 Eu 0.18 Ge 2(1‑x) O7Cl6, where 0≤ x ≤0.12, based on halogen oxides and rare earth Eu 2+ As an activator. The raw materials are weighed according to the stoichiometric ratio, ground, placed in a sintering furnace, introduced into a reducing atmosphere, and sintered by a high-temperature solid-phase method to obtain a sintered body. The sintered body is ground to obtain a rare earth-doped adjustable visible-near-infrared dual-emission phosphor. This preparation method can change the intensity ratio of visible light and near-infrared light by adjusting the content of germanium, thereby accurately controlling the luminescent color and achieving white light and broadband near-infrared emission phenomena at the same time. The preparation method of the phosphor of the present invention is simple, low-cost, and the material is non-toxic, non-polluting, and non-radioactive, suitable for a wide range of applications.

A radiographic image detector includes a scintillator panel including a substrate, and on a substrate surface of the substrate, a vapor deposition film layer in which a phosphor component is vapor-deposited in a film form together with an activator component. A vapor deposition film thickness corresponding to a thickness of the vapor deposition film layer from the substrate surface is set to a thickness within ±10% with respect to a film thickness median value over an entire surface of the vapor deposition film layer. A film thickness distribution related to the vapor deposition film thickness and an activator concentration distribution related to an activator concentration of the activator component in the vapor deposition film layer correlate with each other.

A phosphor (1) is specified with the general formula EA 2-x SE x Si 5-x Al x N8:RE, where - EA is selected from the group of divalent cations, - SE is selected from the group of trivalent cations, - RE is one or more activator elements, and 0 < x ≤ 2. Furthermore, a method for producing a phosphor (1) and an optoelectronic component (2) are specified.