11 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.

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.

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).

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 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.

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.

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 (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.