High-penetration ray detection material and preparation method thereof

Abstract

The invention discloses a high-penetrability ray detection material and a preparation method thereof, and belongs to the technical field of preparation of high-penetrability ray detection materials. On the basis of the Ce: YAG transparent scintillation ceramic, Ce < 3 + >, Mn < 2 + >, Cr < 3 + > and Si < 4 + > are co-doped, and all the elements act synergistically to co-improve the optical performance of Ce: YAG; wherein Mn < 2 + > and other components act to cause non-radiative energy transfer of Ce < 3 + >, increase of emission intensity, broadening of an emission peak and gradual movement to infrared light; co-doping of Cr < 3 + > and Ce < 3 + > can improve scintillation performances such as light output and light absorption intensity; si < 4 + > doping can improve the uniformity of the microstructure, improve the optical transparency and achieve the purpose of improving the luminescence property and the detection effect of the transparent scintillation ceramic.

Description

Technical Field

[0001] This invention belongs to the field of high-penetration X-ray detection material preparation technology, specifically relating to a high-penetration X-ray detection material and its preparation method. Background Technology

[0002] A scintillator is a functional material that converts highly penetrating rays such as X-rays or gamma rays into ultraviolet or visible light. Scintillation materials help in the study of high-energy rays invisible to the naked eye and are widely used in fields such as medical and health care, industrial non-destructive testing, and security inspection. Scintillation detectors, especially those made of transparent ceramics, are the most common application. A scintillation detector consists of two parts: the scintillating material and a photoelectric conversion device that converts ultraviolet or visible light into an electrical signal. When highly penetrating rays pass through a human body or workpiece, the changes in luminescence intensity and distribution are observed. The scintillator converts this light into ultraviolet or visible light, which is then received by the photoelectric conversion device and converted into an electrical signal. This signal assists in diagnosing certain diseases or detecting the nature, size, and distribution of internal defects in workpieces.

[0003] Yttrium aluminum gallium garnet (Y3Al5O) 12 YAG (yellow alumina) is a high-performance transparent oxide scintillation ceramic with promising applications. Rare earth ions Ce 3+ Doping YAG as an activating ion is an important direction in the research of transparent scintillation ceramics. Ce: Y3Al5O 12 (Abbreviated as Ce:YAG) Transparent scintillation ceramics are a common high-penetration X-ray detection medium with characteristics such as high light yield, nanosecond-level fast decay and good irradiation hardness. However, the lack of important scintillation properties such as uniform light emission, low light absorption intensity, low density and semi-transparency leads to low detection efficiency, which seriously limits its application fields. Summary of the Invention

[0004] The purpose of this invention is to provide a high-penetration X-ray detection material and its preparation method, so as to solve the technical problem of poor optical performance of existing scintillation ceramic materials.

[0005] To achieve the above objectives, the present invention employs the following technical solution: This invention discloses a high-penetration X-ray detection material, the chemical formula of which is (Y 0.997 Ce 0.003 )3(Al 1-2x-y )5:Mn x Si x Cr y O 12 ; Where x = 0.04% - 2.4% and y = 0.04% - 2.0%.

[0006] Furthermore, where x = 0.8% - 1.2% and y = 0.10% - 1.5%.

[0007] This invention also discloses a method for preparing the above-mentioned high-penetration X-ray detection material, comprising the following steps: According to the chemical calculation ratio of the chemical formula of the high-penetration X-ray detection material, Al2O3, Y2O3, Ce2(CO3)3, MnCO3, Cr2O3 and SiO2 were weighed and ball-milled to obtain the ball-milled mixture. The ball-milled mixture is then post-processed to obtain a mixed powder. After the mixed powder is subjected to pre-calcination, cold isostatic pressing, sintering and annealing in sequence, a high-penetration X-ray detection material is obtained.

[0008] Furthermore, the ball milling mixing time is 10-12 hours, and the ball milling medium used for ball milling mixing is anhydrous ethanol; The post-processing involves drying and grinding in sequence.

[0009] Furthermore, the pre-calcination temperature is 800-900℃, and the holding time is 2-3h; after the mixed powder is pre-calcined, it is successively ground, passed through a 200-mesh sieve, and dry-pressed, and then cold isostatic pressing is performed.

[0010] Furthermore, the pressure of the cold isostatic pressing process is 180-200 MPa.

[0011] Furthermore, the sintering process is carried out in a vacuum atmosphere; the ambient pressure of the vacuum atmosphere is 10. 3 -2×10 3 Pa.

[0012] Furthermore, the sintering treatment is carried out at a temperature of 1750-1800℃ for 5-7 hours.

[0013] Furthermore, the annealing process is carried out in an air atmosphere; the annealing temperature is 800-820℃ and the time is 20-30h.

[0014] Furthermore, after the annealing process, double-sided parallel polishing is performed to form a ceramic sheet, thereby obtaining a high-penetration X-ray detection material.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a high-penetration X-ray detection material, which is based on Ce:YAG transparent scintillation ceramic and co-doped with Ce. 3+ Mn 2+ Cr 3+ Si 4+The various elements work synergistically to improve the optical properties of Ce:YAG; among them, Mn 2+ It reacts with the other components to cause Ce 3+ Nonradiative energy transfer occurs, resulting in increased emission intensity, broadened emission peak, and a gradual shift towards the infrared light; Cr 3+ and Ce 3+ Co-doping can improve scintillation performance such as light output and light absorption intensity; Si4+ doping can improve the uniformity of microstructure and increase optical transparency, thereby improving the luminescence performance and detection effect of transparent scintillation ceramics.

[0016] Furthermore, Mn 2+ Cr 3+ Si 4+ Doping with certain materials can optimize the structure and composition of the main components, thereby improving the grain size and distribution in ceramics, increasing the efficiency of the densification process, reducing the formation of pores inside the crystals, enhancing transparency, expanding the emission peak range, and increasing the light absorption intensity, thus achieving the goal of improving ceramic quality.

[0017] This invention also discloses a method for preparing the aforementioned high-penetration X-ray detection material, achieving advantages and strategies such as low cost, simplicity, and repeatability in the preparation of transparent scintillation ceramics. Cold isostatic pressing can apply isotropic pressure to the sample, making it more dense and homogeneous. Vacuum hot pressing sintering allows the ceramic to be sintered in a vacuum and hot-pressing environment. Under negative pressure, the gas inside the ceramic diffuses more easily, significantly reducing the porosity within the sintered body, which is beneficial for improving optical transparency. In addition, hot pressing sintering can apply coaxial pressure to the ceramic, reducing the densification process during ceramic sintering, lowering the sintering temperature, and obtaining fine-grained ceramics, increasing the density of the ceramic, and obtaining high-density, high-transparency transparent scintillation ceramics. Annealing treatment can eliminate oxygen vacancies during vacuum sintering, improve luminescence performance, and form a thinner oxide layer on the ceramic surface, reducing its oxidation rate during use, thereby extending the service life of the ceramic in actual high-penetration detection. Detailed Implementation

[0018] To enable those skilled in the art to understand the features and effects of the present invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding the present invention, and in case of conflict, the definitions in this specification shall prevail.

[0019] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.

[0020] In this document, all features defined by numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are for the sake of brevity and convenience only. Accordingly, descriptions of numerical ranges or percentage ranges should be considered as covering and specifically disclosing all possible sub-ranges and individual numerical values ​​(including integers and fractions) within those ranges.

[0021] In this article, unless otherwise specified, “contains,” “includes,” “containing,” “has,” or similar terms cover the meanings of “composed of” and “mainly composed of,” for example, “A contains a” covers the meanings of “A contains a and others” and “A contains only a.”

[0022] For the sake of brevity, not all possible combinations of the technical features in each implementation scheme or embodiment are described herein. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each implementation scheme or embodiment can be combined arbitrarily, and all possible combinations should be considered within the scope of this specification.

[0023] A first aspect of the present invention provides a high-penetration X-ray detection material, the chemical formula of which is (Y 0.997 Ce 0.003 )3(Al 1-2x-y )5:Mn x Si x Cr y O 12 ; Where x = 0.04%-2.4% and y = 0.04%-2.0%, more preferably x = 0.8%-1.2% and y = 0.10%-1.5%.

[0024] The second aspect of the present invention provides a method for preparing the above-mentioned high-penetration X-ray detection material, mainly employing a solid-state reaction method and a vacuum hot-pressing sintering method, comprising the following steps: Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3(Al 1-2x-y )5:Mn x Si x Cr y O 12 The chemical formulas were mixed according to their stoichiometric ratios using a planetary ball mill for 12 hours. The ball milling medium was anhydrous ethanol, resulting in a milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: Pre-fire the mixed powder at a temperature of 800-900℃ for 2-3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The isostatically pressed sample is sintered at 1750℃ in a vacuum atmosphere of 103 Pa for 5-7 hours to obtain the desired transparent scintillation ceramic. Step 6: After sintering, the transparent shimmering ceramic is annealed in air at 800℃ for 20-30 hours and then polished on both sides to form a ceramic sheet.

[0025] To enhance the scintillation performance of yttrium aluminum gallium garnet (YAG) transparent scintillation ceramics, this invention involves doping Ce into YAG ceramics, a common system of transparent scintillation ceramics. 3+ Mn 2+ Cr 3+ Si 4+ Plasma can optimize the structural composition of the main materials, improve the grain size and distribution in ceramics, increase the efficiency of the densification process, reduce the formation of pores inside the crystals, enhance transparency, expand the emission peak range, and enhance the light absorption intensity, thereby improving the quality of ceramics.

[0026] Based on YAG transparent scintillation ceramics, this invention provides a product comprising A3B2C3O. 12 A transparent scintillating ceramic with a garnet-type compound structure and dopant ions of cerium, manganese, and chromium, and charge-compensating ion silicon. In this structure, A represents the rare earth elements Y and Ce. B is a combination of Al and doped Mn, Cr, and Si elements, and C is a combination of Al and doped Mn, Cr, and Si elements. The structural formula of this transparent scintillating ceramic is (Y... 0.997 Ce 0.003 )3(Al 1-2x-y )5:Mn x Si x Cr y O 12 Where x = 0.04%-2.4% and y = 0.04%-2.0%, more preferably x = 0.8%-1.2% and y = 0.10%-1.5%.

[0027] The transparent scintillation ceramic is prepared using a solid-state reaction method and a vacuum hot-pressing sintering method. Compared to precipitation and latex methods, the traditional solid-state method offers advantages such as low cost, simplicity, and repeatability. Cold isostatic pressing applies isotropic pressure to the sample, making it more dense and homogeneous. Simultaneously, vacuum hot-pressing sintering places the ceramic in a vacuum and hot-pressing environment. Under negative pressure, gases within the ceramic diffuse more easily, significantly reducing the porosity of the sintered body. Hot-pressing sintering applies coaxial pressure to the ceramic, reducing the densification process during sintering, lowering the sintering temperature, and obtaining fine-grained ceramics, increasing density, and resulting in high-density, high-transparency, and high-optical-uniformity transparent scintillation ceramics. Annealing treatment forms a thin oxide layer on the ceramic surface, reducing the oxidation rate during use and extending the lifespan of the ceramic in actual high-penetration detection applications.

[0028] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0029] The following examples use instruments and equipment conventional in the art. Experimental methods in the following examples, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer. All raw materials used in the following examples are conventional commercially available products with specifications conventional in the art. In this specification and the following examples, unless otherwise specified, "%" refers to weight percentage, "parts" refers to parts by weight, and "ratio" refers to weight proportion.

[0030] Example 1 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 850℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0031] Example 2 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.7 Mn 0.01 Si 0.01 Cr 0.01 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 850℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0032] Example 3 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.64 Mn 0.012 Si 0.012 Cr 0.012 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 850℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0033] Example 4 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.61 Mn 0.012 Si 0.012 Cr 0.015 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 850℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0034] Example 5 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 800℃ for 2 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 180 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 20 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0035] Example 6 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.7 Mn 0.01 Si 0.01 Cr 0.01 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 8900℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 5 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 30 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0036] Example 7 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.64 Mn 0.012 Si 0.012 Cr 0.012 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 900℃ for 2 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 at 1800℃. 3 Sintering in a vacuum atmosphere of Pa for 7 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 820℃ for 20 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0037] Example 8 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.61 Mn 0.012 Si 0.012 Cr 0.015 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The stoichiometric ratios were mixed using a planetary ball mill for 10 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 880℃ for 2 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 2×10⁻⁶ heat treatment at 1750℃. 3 Sintering in a vacuum atmosphere of Pa for 5 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 25 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0038] Example 9 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.7 Mn 0.01 Si 0.01 Cr 0.01 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 870℃ for 2 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 200 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 810℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0039] Example 10 A method for preparing a high-penetration X-ray detection material includes the following steps: In this embodiment, the chemical formula of the high-penetration X-ray detection material is (Y 0.997 Ce 0.003 )3Al 4.61 Mn 0.012 Si 0.012 Cr 0.015 O 12 ; Step 1: Mix Al2O3 (99.99%), Y2O3 (99.99%), Ce2(CO3)3 (99.99%), MnCO3 (99.95%), Cr2O3 (99.95%), and SiO2 (99.99%) according to (Y 0.997 Ce 0.003 )3Al 4.88 Mn 0.008 Si 0.008 Cr 0.008 O 12 The mixture was prepared by mixing in stoichiometric proportions using a planetary ball mill for 12 hours, with anhydrous ethanol as the milling medium, to obtain the milled mixture. Step 2: The mixture after ball milling is dried and ground sequentially to obtain a mixed powder; Step 3: The obtained mixed powder is pre-fired at a temperature of 850℃ for 3 hours. Step 4: Grind the pre-calcined powder, pass it through a 200-mesh sieve, dry press it, and then perform cold isostatic pressing at 180 MPa; Step 5: The obtained cold isostatically pressed sample is then subjected to 10 hours at 1750°C. 3 Sintering in a vacuum atmosphere of Pa for 6 hours to obtain the desired transparent scintillation ceramic; Step 6: The sintered transparent scintillation ceramic is annealed in air at 800℃ for 28 hours and then polished on both sides to form a ceramic sheet (high-penetration X-ray detection material).

[0040] The high-penetration X-ray detector materials prepared in Examples 1, 2, 3, and 4 of this invention all have a pure garnet structure and no second phase is observed. The YAG scintillation ceramics and co-doped Ce... 3+ Mn 2+ Cr 3+ Si 4+ A complete solid solution was formed, exhibiting good optical transparency. Simultaneously, the microstructure displayed a uniform and dense morphology, with consistent ceramic grain size, thus demonstrating excellent optical uniformity and luminous efficiency. Mn 2+ Increasing doping concentration causes the emission peak to gradually shift towards the infrared light, resulting in peak broadening. Cr 3+ Excessive doping of Si can lead to energy quenching and significantly reduce luminescence intensity; therefore, its doping amount is controlled between 0.10% and 1.5%. 4+ Charge-compensating ions play a certain auxiliary role in enhancing the luminescence performance of Ce:YAG transparent scintillation ceramics, improving the uniformity of the microstructure, and increasing optical transparency doping, but Si... 4+Excessive doping concentration will also cause uneven uniformity of ceramic grains, affecting optical uniformity. Therefore, the doping amount should be controlled between 0.8% and 1.2%.

[0041] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A high penetration ray detection material, characterized in that: The chemical formula of the high penetration ray detection material is (Y 0.997 Ce 0.003 )3(Al 1-2x-y )5: Mn x Si x Cr y O 12 ; Among them, x=0.04%-2.4%, y=0.04%-2.0%.

2. A high penetration ray detection material according to claim 1, characterized in that: in, x=0.8%-1.2%,y=0.10%-1.5%.

3. The method for preparing a high-penetration ray detection material according to claim 1 or 2, characterized in that: The following steps are involved: According to the chemical calculation ratio of the chemical formula of the high-penetration ray detection material, Al2O3, Y2O3, Ce2(CO3)3, MnCO3, Cr2O3 and SiO2 are weighed and ball-milled to obtain a ball-milled mixture; Post-processing the ball-milled mixture to obtain a mixed powder; The mixed powder is subjected to pre-sintering treatment, cold isostatic pressing treatment, sintering treatment and annealing treatment in sequence to obtain a high-penetration ray detection material.

4. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The ball milling mixing time is 10-12 hours, and the ball milling medium used in the ball milling mixing is anhydrous ethanol; The post-treatment is drying and grinding in sequence.

5. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The temperature of the pre-sintering treatment is 800-900°C, and the heat preservation time is 2-3h; after the mixed powder is pre-sintered, it is ground, passed through a 200-mesh sieve, dry pressed, and then cold isostatic pressed.

6. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The pressure of the cold isostatic pressing treatment is 180-200 MPa.

7. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The sintering process is carried out in a vacuum atmosphere; the ambient pressure of the vacuum atmosphere is 10 3 -2×10 3 Pa.

8. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The sintering process is carried out at a temperature of 1750-1800° C. and for a time of 5-7 hours.

9. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: The annealing treatment is carried out in an air atmosphere; the temperature of the annealing treatment is 800-820° C., and the time is 20-30 hours.

10. The method for preparing a high-penetration ray detection material according to claim 3, characterized in that: After the annealing treatment, double-sided parallel polishing is performed to form a ceramic sheet to obtain a high-penetration ray detection material.