Rare earth scintillation crystal prepared from low-cost rare earth raw materials and low-cost growth process of rare earth scintillation crystal

A technology of scintillation crystal and crystal growth, which is applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., and can solve problems hindering the application in the detection field

Active Publication Date: 2016-05-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the expensive cost of rare earth scintillation crystals has become a shackle in its application field, and has hindered further wider application in the field of detection. How to red

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rare earth scintillation crystal prepared from low-cost rare earth raw materials and low-cost growth process of rare earth scintillation crystal

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0075] Example 1

[0076] According to the above-mentioned raw material preparation process, a polycrystalline raw material of yttrium lutetium silicate crystal doped with trivalent cerium ion is prepared. The high temperature solid phase reaction is as follows:

[0077] 2xCeO 2 +yY 2 O 3 +(1-x-y)Lu 2 O 3 +SiO 2 →(Ce x Lu 1-x-y Y y ) 2 SiO 5 +1 / 2O 2 ↑

[0078] The purity of 99.9% Lu 2 O 3 , Y 2 O 3 , CeO 2 And SiO 2 After three-stage series crystallization, Lu with purity greater than 99.995% is obtained 2 O 3 , Y 2 O 3 , CeO 2 And SiO 2 Of high-purity raw materials, according to (CeYLu) 2 O 3 :SiO 2 = 1.1, CeO 2 :(Y 2 O 3 +Lu 2 O 3 )=0.01, Y 2 O 3 :Lu 2 O 3 =0.18 The proportion is accurately weighed 2400g, after the ingredients are put into the mixer, fully mixed for 28h, so that the raw materials are evenly mixed. Press the raw material cake under 30MPa, put the raw material cake into the high-purity crucible, in the partial reducing atmosphere N 2 +H 2 Sintered at 1100°C under pr...

Example Embodiment

[0082] Example 2

[0083] According to the above-mentioned raw material preparation process, a polycrystalline raw material of yttrium lutetium silicate crystal doped with trivalent cerium ion is prepared. The high temperature solid phase reaction is as follows:

[0084] 2xCeO 2 +yY 2 O 3 +(1-x-y)Lu 2 O 3 +SiO 2 →(Ce x Lu 1-x-y Y y ) 2 SiO 5 +1 / 2O 2 ↑

[0085] The purity of Lu is greater than 99.995% 2 O 3 , Y 2 O 3 , CeO 2 , SiO 2 High purity raw materials in accordance with (CeYLu) 2 O 3 :SiO 2 = 0.85, CeO 2 :(Y 2 O 3 +Lu 2 O 3 ) = 0.008, Y 2 O 3 :Lu 2 O 3 =0.15 Accurately weigh 2400g with a ratio, and put it into the mixer to fully mix for 28h after mixing to make the raw materials evenly mixed. Press the raw material cake under 30MPa, put the raw material cake into the high-purity crucible, in the partial reducing atmosphere N 2 +H 2 Sintered at 1100°C under protection to form a polycrystalline block. The cerium-doped yttrium lutetium silicate crystal is grown by directionally ...

Example Embodiment

[0087] Example 3

[0088] According to the above-mentioned raw material preparation process, a polycrystalline raw material of gadolinium lutetium silicate crystal doped with trivalent cerium ion is prepared. The high temperature solid phase reaction is as follows:

[0089] 2xCeO 2 +yGd 2 O 3 +(1-x-y)Lu 2 O 3 +SiO 2 →(Ce x Lu 1-x-y Gd y ) 2 SiO 5 +1 / 2O 2 ↑

[0090] Purity is greater than 99.99% Lu 2 O 3 , Gd 2 O 3 , CeO 2 , SiO 2 High-purity raw materials in accordance with (CeGdLu) 2 O 3 :SiO 2 = 1.15, CeO 2 :(Gd 2 O 3 +Lu 2 O 3 )=0.03, Gd 2 O 3 :Lu 2 O 3 =0.15 Accurately weigh 5500g with a proportioning ratio, and put it into the mixer to fully mix for 48h after mixing to make the raw materials evenly mixed. The raw material cake is pressed at 55MPa, and the raw material cake is put into the high-purity crucible in a partially reducing atmosphere. 2 +H 2 Sintered at 1100°C under protection to form a polycrystalline block. The cerium-doped yttrium lutetium silicate crystal is grow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a low-cost rare earth scintillation crystal. The rare earth scintillation crystal is prepared from RE2O3, silicon dioxide, cerium oxide and lutecium oxide through crystal growth; the ratio of the sum of mass of RE2O3, cerium oxide and lutecium oxide to mass of silicon dioxide is (0.75-1.25): 1; the ratio of mass of cerium oxide to the sum of mass of RE2O3 and lutecium oxide is (0.005-0.04): 1; the mass ratio of RE2O3 to lutecium oxide is (0.005-1): 1. The ratio of raw materials is determined in accordance with relationship between composition and the temperature in a crystal growth congruent melting region; the liquid/solid phase change temperature point in the scintillation crystal growth process can be effectively lowered by adopting the special raw material ratios, energy consumption and precious metal consumption for crystal growth are reduced, shortening of growth time is facilitated due to the rapid growth process, the crystal yield is high, and the apparent low-cost advantage is achieved.

Description

technical field [0001] The invention relates to the technical field of scintillation crystal materials, in particular to a rare earth scintillation crystal prepared from low-cost rare earth raw materials and a low-cost growth process. Background technique [0002] Scintillation crystals refer to crystals that can convert the kinetic energy of high-energy particles into light energy and emit flashes under the impact of high-energy particles such as X-rays and radiation. Scintillation, on the other hand, refers to a radioluminescent process that converts high-energy rays or particles into pulses of ultraviolet or visible fluorescence. The main application fields of scintillation crystals are high energy physics, nuclear physics, nuclear medicine (such as XCT, PET and g camera), industrial application (industrial CT), geological exploration, oil well logging, etc. Scintillation crystals can emit light waves in the visible light band under the excitation of rays. The maximum sc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C30B29/34C30B15/36C09K11/79
CPCC09K11/7774C30B15/36C30B29/34
Inventor 薛冬峰孙丛婷
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap