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Twinkling transparent ceramics system with garnet structure and preparation method thereof

A technology of transparent ceramics and garnets, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limited optical properties of scintillation ceramics, and achieve the effects of excellent thermodynamic properties, low production cost, and high luminous efficiency.

Active Publication Date: 2009-08-26
中科西卡思(苏州)科技发展有限公司
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AI Technical Summary

Problems solved by technology

[0009] However, the above work uses a rare earth ion as the luminescent ion, and the matrix material is a single rare earth aluminate system, and the optical properties of the prepared scintillation ceramics have certain limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: m=0.01, n=0, x=0, y=0.4,

[0032] 3at%Ce:Y 2.97 (Al 0.4 Ga 0.6 ) 5 o 12

[0033] Commercially available high-purity raw materials: Al 2 o 3 (99.99%, 0.3μm), .Y 2 o 3 (99.99%, 10μm), CeO 2 (99.99%, 10μm), Ga 2 o 3 (>99.99%, 1.0μm), according to (Ce 0.01 Y 0.99 ) 3 (Al 0.4 Ga 0.6 ) 5 o 12 Weighing the ratio, using water or ethanol as ball milling medium, with high-purity Al 2 o 3 The ball is used as the ball milling medium. On a high-energy ball mill, high-speed ball milling is carried out for 10-24 hours, and the ball milling speed is above 240rmp. After the slurry is dried and sieved, it is pressed into a green body by isostatic pressing (pressure not less than 150Mpa). Sintering under vacuum conditions, the sintering temperature range is 1700°C-1850°C, annealing in air for 5-50 hours, the annealing temperature range is 1000°C-1650°C, and finally obtain dense and transparent CeYAGG sparkling transparent ceramics. The XRD phase is charact...

Embodiment 2

[0034] Embodiment 2: m=0.02, n=0, x=0.3, y=0.6

[0035] 2at%Pr:(Gd 0.68 Y 0.3 ) 3 Al 5 o 12

[0036] Commercially available high-purity raw materials: Al 2 o 3 (99.99%, 0.3μm), Y 2 o 3 (99.99%, 5μm), Gd 2 o 3 (99.99%, 10μm), Pr 6 o 11 (99.999%, 0.5μm), according to (Pr 0.02 Gd 0.68 Y 0.3 ) 3 Al 5 o 12 Weighing the ratio, using water or ethanol as ball milling medium, with high-purity Al 2 o 3 The ball is used as the ball milling medium. On a high-energy ball mill, high-speed ball milling is carried out for 10-24 hours, and the ball milling speed is above 240rmp. After the slurry is dried and sieved, it is pressed into a green body by isostatic pressing (pressure not less than 150Mpa). In the silicon-molybdenum rod furnace, under the air atmosphere, the temperature range of 1250°C-1650°C is kept for 5-50 hours. After the XRD phase is characterized as the garnet phase, it is then sintered under hot pressing or air atmosphere. The sintering temperature range i...

Embodiment 3

[0037] Embodiment 3: m=0.02, n=0.01, x=0.7, y=0.5

[0038] 2at%Ce, 1at%Tb:(Gd 0.3 Yb 0.7 ) 3 (Al 0.5 Ga 0.5 ) 5 o 12

[0039] Commercially available high-purity raw materials: Al 2 o 3 (99.99%, 0.3μm), Yb 2 o 3 (99.99%, 5μm), Gd 2 o 3 (99.99%, 1.0μm), Pr 6 o 11 (99.99%, 10μm), Ce(NO 3 ) 3 .6H 2 O (99.99%, 10μm) by (Ce 0.02 PR 0.01 Gd 0.3 Yb 0.7 ) 3 (Al 0.5 Gd 0.5 ) 5 o 12 The proportion of weighing, using water or ethanol as ball milling aid, with high-purity Al 2 o 3 The ball is used as the ball milling medium. On a high-energy ball mill, high-speed ball milling is carried out for 10-24 hours, and the ball milling speed is above 240rmp. After the slurry is dried and sieved, it is pressed into a green body by isostatic pressing (pressure not less than 150Mpa). Sintering under vacuum conditions, the sintering temperature ranges from 1700°C to 1850°C, anneals in hydrogen or a mixture of air and hydrogen for 5-50 hours, the annealing temperature ranges...

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PUM

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Abstract

The invention provides a twinkling transparent ceramics with garnet structure and a preparation method thereof. The twinkling transparent ceramics is characterized in that oxysalt of the garnet structure is taken as substrate, and the structural formula of the garnet structure is 3mR, 3nR': (A(1-m-n-x) A'x)3 (By C(1-y))5 O12, wherein, m and n are more then or equal to 0 and less than or equal to 0.1, x is more than or equal to 0 and less than or equal to 1, and y is more then or equal to 0 and less than or equal to 0.4; one or combination in Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Cr, Ti and Mn can be taken as luminous ion. The product uses high-purity material (being more than 99.99%) for high-energy ball milling to process powder by being added with sintering accessory ingredient and combining vacuum sintering, so that the twinkling transparent ceramics with high optical quality can be obtained. In visible light area, the twinkling transparent ceramics has the transmission reaching 80% or above, and the stimulated emission peak is matched with sensitizing range of a photoelectric detector. The twinkling transparent ceramics is a scintillating material having application prospect in the field of detecting high-energy rays (such as electron, alpha and beta particles, x-ray, gamma-ray and the like). The invention can be applied to an electron microscope, a counter, a ray imaging screen and the like, and has the advantages of simple technique, low production cost, etc.

Description

technical field [0001] The invention relates to a sparkling transparent ceramic system with a garnet structure and a preparation method thereof, belonging to the field of rare earth oxide-containing transparent products and preparation. Background technique [0002] Scintillation material is a high-performance photoelectric functional material that can absorb high-energy rays (electrons, α and β particles, X-rays, γ-rays, etc.) and emit ultraviolet or visible light. It is used as the core material of beam energy detectors. In high-energy physics, Nuclear medical imaging, safety inspection, industrial detection, oil exploration and other fields have broad application prospects. Among them, scintillating transparent ceramic materials, with their excellent thermodynamic and mechanical properties, can achieve high-concentration doping of active ions and composite structure design. , is becoming a research hotspot at home and abroad in recent years. In addition, compared with the...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/622C09K11/08C04B35/63C04B35/64
Inventor 石云潘裕柏冯锡淇李江寇华敏刘文斌黄莉萍郭景坤
Owner 中科西卡思(苏州)科技发展有限公司
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