摘要:
The present disclosure relates to a process for fabricating a crystalline scintillator material with a structure of elpasolite type of theoretical composition A2BC(1-y)MyX(6-y) wherein: A is chosen from among Cs, Rb, K, Na, B is chosen from among Li, K, Na, C is chosen from among the rare earths, Al, Ga, M is chosen from among the alkaline earths, X is chosen from among F, Cl, Br, I, y representing the atomic fraction of substitution of C by M and being in the range extending from 0 to 0.05, comprising its crystallization by cooling from a melt bath comprising r moles of A and s moles of B, the melt bath in contact with the material containing A and B in such a way that 2s/r is above 1. The process shows an improved fabrication yield. Moreover, the crystals obtained can have compositions closer to stoichiometry and have improved scintillation properties.
摘要:
Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb3+, Ho3+, and Ce3+− co-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Nd3+ and Yb3+ co-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.
摘要:
A phosphor, which is represented by the general formula containing M, Ce, Pr, Si, and N, is provided. M is at least one element selected from the group consisting of La, Y, Tb and Lu. A molar ratio of M is greater than 2.0 and smaller than 3.5. A molar ratio of Ce is greater than 0 and smaller than 1.0. A molar ratio of Pr is greater than 0 and smaller than 0.05. A molar ratio of N is greater than 10 and smaller than 12, under the condition that a molar ratio of Si is set to 6. The phosphor further contains 10 to 10,000 ppm of fluorine.
摘要:
A phosphor, which is represented by the general formula containing M, Ce, Pr, Si, and N, is provided. M is at least one element selected from the group consisting of La, Y, Tb and Lu. A molar ratio of M is greater than 2.0 and smaller than 3.5. A molar ratio of Ce is greater than 0 and smaller than 1.0. A molar ratio of Pr is greater than 0 and smaller than 0.05. A molar ratio of N is greater than 10 and smaller than 12, under the condition that a molar ratio of Si is set to 6. The phosphor further contains 10 to 10,000 ppm of fluorine.
摘要:
Compositions, devices, and methods for optimizing photosynthetically active radiation by utilizing a composition comprising a quantum confinement material having an emission spectra of between 300 nm and 545 nm, and a quantum confinement material having an emission spectra of between 545 nm and 750 nm where the composition may be embedded in and/or coated on one or more transparent surfaces.
摘要:
A phosphor is provided which is represented by the general formula MxCeyPrzSi6N8+w. M is at least one element selected from the group consisting of La, Y, Tb and Lu. And x, y, z and w satisfy 2.0
摘要:
A polycrystalline ceramic scintillator body includes a ceramic scintillating material comprising an oxide of gadolinium (Gd) and a second rare earth element (Re). The ceramic scintillating material has a composition, expressed in terms of molar percentage of oxide constituents, that includes greater than fifty-five percent (55%) Gd2O3 and a minority percentage Of Re2O3. The ceramic scintillating material includes an activator.
摘要翻译:多晶陶瓷闪烁体包括陶瓷闪烁体材料,其包含钆(Gd)和第二稀土元素(Re)的氧化物。 陶瓷闪烁材料具有以氧化物组分的摩尔百分比表示的组成,其包括大于百分之五十五(55%)的Gd 2 O 3和少量的Re 2 O 3。 陶瓷闪烁材料包括活化剂。
摘要:
A filter for trapping, sterilizing, and decomposing organic matter, bacteria, viruses, and other harmful substances is provided at low cost and extremely high efficiency. A semiconductor material having a light emitting function is formed in the interior or on the surface of a porous ceramic material substrate by deposition from a suspension of semiconductor particles, and an electrode provided to serve as a filter. Voltage is applied so that ultraviolet light is emitted while a fluid is being filtered, and any harmful substances are filtered and simultaneously sterilized and decomposed.
摘要:
Described herein are techniques for authenticating and identifying objects by detecting markings through turbid materials. In one embodiment, a container includes a substrate having an outer surface and an inner surface and including a turbid material. The container also includes a marking adjacent to the inner surface and including a luminescent material that exhibits photoluminescence in response to incident light directed on the outer surface. The photoluminescence has a quantum efficiency of at least 20 percent and a peak emission wavelength in the near infrared range.
摘要:
Fluorescent or phosphorescent nanoparticles, fluorescent or phosphorescent magnetic nanoparticles, combustion-based methods for their synthesis, and methods to functionalize them are described. The methods provided by the invention are simplified, efficient and cost effective as compared to prior art methods. The resulting fluorescent or phosphorescent nanoparticles have reduced tendency toward aggregation, and diminished need for postmanufacturing processing steps. The particles may be manufactured with combinations of lanthanides so as to absorb and emit light over a variety of wavelengths.