Saint-gobain Ceramics & Plastics, Inc.

Centre National De La Recherche Scientifique

Qiwei Chen

Xiaofeng Peng

Anne B Hardy

Bruno Viana

Brian C LaCourse

Morteza Zandi

Hélène Laetitia Rétot

Nathalie Petigny

Andrée Kahn-Harari

Hélène Loetitia Rétot

An article, such as a light emitting device, can include a first material and a second material, wherein the first material is capable of emitting first radiation having a first emission maximum at a first wavelength, and the second material is capable of emitting second radiation in response to capturing the first radiation. The second material can have a second emission maximum at a second wavelength within the visible light spectrum. In an embodiment, the second material can be different from the first material. In another embodiment, a difference between the first wavelength and the second wavelength can be at least approximately 70 nm. Additionally, the second material can include a luminescent material having a formula of GdYAlGaO, where x is at least approximately 0.2 and no greater than approximately 0.99 and y is at least approximately 0.05 and no greater than approximately 0.99.

Article including a light emitting gadolinium-containing material and a process of forming the same

A scintillation device includes a ceramic scintillator body that includes a polycrystalline ceramic scintillating material comprising gadolinium. The polycrystalline ceramic scintillating material is characterized by a pyrochlore crystallographic structure. A method of producing a ceramic scintillator body includes preparing a precursor solution including a rare earth element precursor, a hafnium precursor, and an activator (Ac) precursor. The method also includes obtaining a precipitate from the solution and calcining the precipitate to produce a polycrystalline ceramic scintillating material including the rare earth element, hafnium, and the activator, and having a pyrochlore titrating the precursor solution into the precipitant solution structure.

Ceramic scintillator body and scintillation device

A ceramic scintillator body includes a polycrystalline ceramic scintillating material having a substantially cubic crystallographic structure. The polycrystalline ceramic scintillating material has a chemical composition represented by a general formula LUGdO:Ac, where x is greater than zero and less than two, and where Ac is an activator.

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%) GdOand a minority percentage Of ReO. The ceramic scintillating material includes an activator.

A scintillation device includes a free-standing ceramic scintillator body that includes a polycrystalline ceramic scintillating material comprising a rare earth element, wherein the polycrystalline ceramic scintillating material is characterized substantially by a cation-deficient perovskite structure. A method of producing a free-standing ceramic scintillator body includes preparing a precursor solution including a rare earth element precursor, a hafnium precursor and an activator (Ac) precursor, obtaining a precipitate from the solution, and calcining the precipitate to obtain a polycrystalline ceramic scintillating material including a rare earth hafnate doped with the activator and having a cation-deficient perovskite structure.

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Shanghai, China

Qiwei Chen