Manufacturing method of scintillator material and scintillator material
US-2023258830-A1 · Aug 17, 2023 · US
Scintillator material, radiation detector, and method for producing scintillator material
US12466997B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12466997-B2 |
| Application number | US-202218281054-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 2, 2022 |
| Priority date | Mar 11, 2021 |
| Publication date | Nov 11, 2025 |
| Grant date | Nov 11, 2025 |
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Abstract
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Provided is a scintillator material that is excited by radiation rays to emit visible light. The scintillator material has a cristobalite structure obtained by crystallizing a part of silica. A fluorescent material SrI 2 :Eu 2+ is incorporated into the cristobalite structure to form a nanocomposite, and the cristobalite structure contains an alkali metal ion.
First claim
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The invention claimed is: 1 . A scintillator material that is excited by radiation to emit visible light, the scintillator material comprising: a cristobalite structure obtained by crystallizing a part of silica, wherein a fluorescent material SrI 2 :Eu 2+ is incorporated into the cristobalite structure to form a nanocomposite, and the cristobalite structure contains an alkali metal ion. 2 . The scintillator material according to claim 1 , wherein the alkali metal ion is any one of Li + , Na + , K + , Rb + , and Cs + . 3 . The scintillator material according to claim 1 , wherein the alkali metal ion is contained at a ratio of 0.1 mol % to 10 mol % with respect to Si contained in the cristobalite structure. 4 . The scintillator material according to claim 1 , wherein the fluorescent material is contained in a form of a single crystal or a polycrystal. 5 . The scintillator material according to claim 1 , wherein the silica is a porous body in which voids are distributed from a surface to an inside thereof. 6 . The scintillator material according to claim 5 , wherein the porous body is an aggregate of amorphous SiO 2 particles having an average particle diameter (D50) of 2 μm to 50 μm. 7 . The scintillator material according to claim 6 , wherein the SiO 2 particles contain an alkali metal component. 8 . The scintillator material according to claim 5 , wherein Sr ions are contained at a ratio of 0.9 mol % to 15 mol %, I ions are contained at a ratio of 2.0 mol % to 40 mol %, and Eu ions are contained at a ratio of 0.1 mol % to 5.0 mol %, with respect to Si contained in the cristobalite structure. 9 . A radiation detector comprising: the scintillator material according to claim 1 ; and a light detection unit configured to detect a wavelength of 400 nm or more and 500 nm or less. 10 . A method for producing a scintillator material, the method comprising: a powder preparation step of forming a raw material powder containing a fluorescent material SrI 2 :Eu 2+ and an alkali metal material; a porous body formation step of forming silica that is a porous body in which voids are distributed from a surface to an inside thereof; and a heat treatment step of bringing the porous body into contact with the raw material powder and performing a heat treatment.
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Classifications
Scintillation-photodiode combinations · CPC title
the detector being a crystal · CPC title
with scintillation detectors · CPC title
containing fluorine, chlorine, bromine, iodine or unspecified halogen elements · CPC title
Use of particular materials as binders, particle coatings or suspension media therefor · CPC title
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- What does patent US12466997B2 cover?
- Provided is a scintillator material that is excited by radiation rays to emit visible light. The scintillator material has a cristobalite structure obtained by crystallizing a part of silica. A fluorescent material SrI 2 :Eu 2+ is incorporated into the cristobalite structure to form a nanocomposite, and the cristobalite structure contains an alkali metal ion.
- Who is the assignee on this patent?
- Koito Mfg Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09K11/7733. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 11 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).