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A kind of cerium-doped lutetium disilicate scintillation ceramics and preparation method thereof

A technology of lutetium pyrosilicate and scintillation ceramics, which is applied in the field of optical ceramics, can solve the problems of high visible light transmittance, easy agglomeration of ceramic particles, and low oxidation degree, and achieve high purity, strong scintillation performance, and improved mechanical properties.

Inactive Publication Date: 2021-05-07
安泰(德清)时装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention patent with the application number CN201210249353.6 discloses the hot pressing and sintering preparation method of cerium fluoride scintillating ceramics and the prepared cerium fluoride scintillation ceramics. 3 The powder is pre-pressed, and the high-purity CeF 3 The purity of the powder is more than 99%; heating process: after removing the pre-compression pressure, vacuumize to make the vacuum degree -3 Pa, then raise the temperature to 800~1000°C; and the hot pressing sintering process: keep at 800~1000°C, pressurize to 100~300MPa, keep the temperature and pressure for 0.5~2.5h, the ceramic has high visible light transmittance, crystal It has the advantages of small particle size, high density, and low oxidation degree, but due to the disadvantages of easy introduction of impurities, easy aggregation of ceramic particles, and poor product dispersion and poor uniformity, the present invention provides a high-purity, Cerium-doped lutetium disilicate scintillation ceramic with strong uniformity and strong scintillation performance and preparation method thereof

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] A cerium-doped lutetium disilicate scintillation ceramic, the general composition formula of the cerium-doped lutetium disilicate scintillation ceramic is (Lu 0.999 Ce 0.001 ) 2 Si 2 o 7 , Ce 3+ Ions are active ions.

[0031] A preparation method of cerium-doped lutetium disilicate scintillation ceramics, comprising the following steps:

[0032] a will Lu 2 o 3 powder, SiO 2 Powder, Ce 2 o 3 Powder according to the general formula (Lu 0.999 Ce 0.001 ) 2 Si 2 o 7 The molar ratio of the ions in the mixture is mixed evenly, pressed into a block under a pressure of 180MPa, then put the block into a mug furnace, sintered at 1200°C for 10h to form a polycrystalline LPS crystal, crushed and sieved the polycrystalline LPS crystal to obtain LPS : Ce powder, LPS:Ce powder and ethanol are mixed according to a volume ratio of 1:1 to obtain a mixed slurry, and the mixed slurry is ball milled;

[0033] b. Pass the ball-milled slurry through a 200-300 mesh sieve, then in...

Embodiment 2

[0038] A cerium-doped lutetium disilicate scintillation ceramic, the general composition formula of the cerium-doped lutetium disilicate scintillation ceramic is (Lu 0.94 Ce 0.06 ) 2 Si 2 o 7 , Ce 3+ Ions are active ions.

[0039] A preparation method of cerium-doped lutetium disilicate scintillation ceramics, comprising the following steps:

[0040] a will Lu 2 o 3 powder, SiO 2 Powder, Ce 2 o 3 Powder according to the general formula (Lu 0.94 Ce 0.06 ) 2 Si 2 o 7 Mix the molar ratio of the ions in the mixture evenly, press it into a block at a pressure of 180MPa, then put the block into a mug furnace, sinter at 1200°C for 10h to form a polycrystalline LPS crystal, and then feed the polycrystalline LPS crystal into an iridium crucible , in a pure nitrogen or argon atmosphere, the crystal is pulled and grown, the rotating speed of the crystal is 10r / min during the pulling process, and the speed of the crystal is 0.3mm / h to obtain a single crystal LPS crystal, an...

Embodiment 3

[0046] A cerium-doped lutetium disilicate scintillation ceramic, the general composition formula of the cerium-doped lutetium disilicate scintillation ceramic is (Lu 0.99 Ce 0.01 ) 2 Si 2 o 7 , Ce 3+ Ions are active ions.

[0047] A preparation method of cerium-doped lutetium disilicate scintillation ceramics, comprising the following steps:

[0048] a will Lu 2 o 3 powder, SiO 2 Powder, Ce 2 o 3 Powder according to the general formula (Lu 0.99 Ce 0.01 ) 2 Si 2 o 7 Mix the molar ratio of ions in the mixture evenly, press into a block at a pressure of 190MPa, then put the block into a mug furnace, sinter at 1100°C for 11 hours to form a polycrystalline LPS crystal, and then feed the polycrystalline LPS crystal into an iridium crucible , in a pure nitrogen or argon atmosphere, the crystal is pulled and grown, the rotation speed of the crystal during the pulling process is 15r / min, and the speed of the crystal is 0.1mm / h to obtain a single crystal LPS crystal, and ...

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Abstract

The invention relates to the technical field of optical ceramics. In order to solve the shortcomings of the current prior art scintillation ceramics that are easy to introduce impurities, ceramic particles are easy to agglomerate, and easily cause product dispersion and poor uniformity, a cerium-doped lutetium disilicate scintillation ceramic is proposed. The present invention is a cerium-doped The general composition formula of heteropyrosilicate lutetium scintillation ceramics is (Lu 1‑ x Ce x ) 2 Si 2 o 7 , where x=0.001‑0.06. The present invention uses cerium-doped lutetium disilicate instead of the currently widely used cerium-doped lutetium silicate as the raw material of scintillation ceramics, which improves the scintillation efficiency of the product, reduces the melting point, increases the luminous temperature, and improves the performance of the present invention. Applicability, while enhancing the transparency and stability of the present invention, so the present invention has the advantages of high strength, good insulation, high purity, strong uniformity, strong scintillation performance and high temperature resistance, and can be applied to the machinery of special fibers Industrial CT, clothing fiber measurement and other technical fields.

Description

technical field [0001] The invention relates to the technical field of optical ceramics, in particular to a cerium-doped lutetium disilicate scintillation ceramic and a preparation method thereof. Background technique [0002] Ceramic scintillation materials have high density, high light output, high light yield, and short decay time. They are suitable for medical imaging, space physics, high-energy physics, industrial flaw detection, geological exploration and other fields. At present, the field of smart clothing is gradually developing, and scintillation ceramics play a role in it. It plays an important role and is of great value in the metal flaw detection of components and the measurement and control of special fibers. [0003] Although the light output of ceramic scintillation materials is not as good as that of crystal scintillation materials, ceramic scintillation materials generally have good transparency and stability, high strength, good insulation, and can withsta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/16C04B35/622C04B35/626C04B35/64
CPCC04B35/16C04B35/622C04B35/62615C04B35/6268C04B35/64C04B2235/3229C04B2235/60C04B2235/6586C04B2235/662C04B2235/9646
Inventor 钱安华
Owner 安泰(德清)时装有限公司
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