Cerium doped silicate lutetium scintillating fiber and electrostatic spinning synthetic method thereof

A scintillation fiber and electrospinning technology, applied in fiber processing, filament/thread forming, spinning solution preparation, etc., to achieve excellent scintillation performance, continuous shape, and low production cost

Inactive Publication Date: 2014-05-07
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the preparation of cerium-doped lutetium silicate scintillation fibers by electrospinning technology.

Method used

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  • Cerium doped silicate lutetium scintillating fiber and electrostatic spinning synthetic method thereof
  • Cerium doped silicate lutetium scintillating fiber and electrostatic spinning synthetic method thereof
  • Cerium doped silicate lutetium scintillating fiber and electrostatic spinning synthetic method thereof

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Experimental program
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Embodiment 1

[0039] (1) Weigh 4.64g of lutetium oxide, add 15g of concentrated nitric acid, heat and stir until dissolved, then evaporate the solution to obtain white solid lutetium nitrate; (2) add 15g of ethanol, stir and dissolve the solid lutetium nitrate, and then add 0.0506g of cerium nitrate, then add 1g of polyvinyl butyral, stir until transparent viscous liquid; (3) Weigh 2.5g of tetraethyl orthosilicate, add to the mixture of 2.5g of absolute ethanol and 0.5g of water Add 0.05g of concentrated hydrochloric acid, stir for 1 hour, and mix evenly; (4) Mix the solution prepared in step (2) with the solution prepared in step (3), and stir for 1 hour to obtain the spinning stock solution; (5) The prepared spinning stock solution is added to the syringe, the spinning voltage is adjusted to 15kV, the injection speed parameter is 1ml / h, the needle is selected as a No. 7 needle, the receiving device is a drum, the drum speed is 10m / min, and the length of the cylinder is 300mm. The diameter...

Embodiment 2

[0041] (1) Weigh 9.28g of lutetium oxide, add 30g of concentrated nitric acid, heat and stir until dissolved, then evaporate the solution to obtain white solid lutetium nitrate; (2) add 15g of ethanol, stir and dissolve the solid lutetium nitrate, and then add 0.0202g of cerium nitrate, then add 1g of polyvinyl butyral, and stir until a transparent viscous liquid; (3) Weigh 5g of tetraethyl orthosilicate, add it to the mixture of 5g of absolute ethanol and 1g of water, and then Add 0.1g of concentrated hydrochloric acid, stir for 2 hours, and mix well; (4) Mix the solution prepared in step (2) with the solution prepared in step (3), and stir for 2 hours to obtain the spinning stock solution; (5) Prepare the prepared Add the spinning stock solution into the syringe, adjust the spinning voltage to 12kV, the injection speed parameter is 5ml / h, the needle is No. 7 needle, the receiving device is a drum, the drum speed is 10m / min, the length of the cylinder is 300mm, and the diamete...

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Abstract

The invention discloses a cerium doped silicate lutetium scintillating fiber and an electrostatic spinning synthetic method thereof, the chemical composition of the the scintillating fiber is as follows: Lu2SiO5:Ce<3+>, the atomic weight percentage of Ce / Lu is 0.1%-2%, the crystal structure is Lu2SiO5, and the fiber diameter is 500 nm to 2 microns. The cerium doped silicate lutetium scintillating fiber is synthesized by electrospinning, the fiber prepared by the method is continuous, high in the ratio of length to diameter, smooth in surface, simple in process, low in production cost, controllable in fiber forming and good in scintillation properties. The cerium doped silicate lutetium scintillating fiber prepared by the method has great application potential in scintillating materials for PET (Positron Emission Tomography) and other nuclear medicine diagnosis.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-optical functional materials, and relates to a cerium-doped lutetium silicate scintillation fiber and a synthesis method thereof, in particular to a method for synthesizing cerium-doped lutetium silicate scintillation fiber by electrospinning. Background technique [0002] Cerium-doped lutetium silicate (Lu 2 SiO 5 : Ce 3+ , abbreviated as LSO: Ce) density is about 7.4g / cm 3 , the density is relatively high, and the fluorescence decay time is short, about 30~40ns, less than 1 / 7 of scintillation single crystal BGO (BGO is an excellent scintillation single crystal, used in nuclear medicine detectors), the fluorescence emission peak Within the detection sensitivity range of the photomultiplier tube, the effective atomic number is Z=66, and it has good detection efficiency for γ-rays, and its energy resolution is similar to that of BGO. Moreover, cerium-doped lutetium silicate (LSO:Ce)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01F11/00D01D5/00D01D1/02C09K11/79
Inventor 刘茜卢琦刘光辉魏钦华
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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