Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of ce:lu2sio5 polycrystalline scintillation optical ceramics without pressure sintering

A technology of optical ceramics and preparation process, which is applied in the field of preparation of polycrystalline scintillation optical ceramics, which can solve the problems of increased equipment requirements, sample contamination, cracking, etc., and achieve the effects of reducing intermediate steps, fast decay characteristics, and simplifying the preparation process

Inactive Publication Date: 2014-10-01
SHANGHAI UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from existing reports, Ce:Lu 2 SiO 5 The densification process of ceramics is mostly completed with the assistance of pressure, which inevitably causes sample contamination and local cracking, and also increases the requirements for equipment

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
  • Preparation method of ce:lu2sio5 polycrystalline scintillation optical ceramics without pressure sintering
  • Preparation method of ce:lu2sio5 polycrystalline scintillation optical ceramics without pressure sintering
  • Preparation method of ce:lu2sio5 polycrystalline scintillation optical ceramics without pressure sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 20 g of lutetium chloride (LuCl 3 ) and 8.05ml of tetraethyl orthosilicate (Si(C 2 h 5 O) 4 ) dissolved in 142.5 ml of isopropanol ((CH 3 O) 2 CHOH), add another 0.68 ml concentration of 0.522 mol / L cerium nitrate (Ce(NO 3 ) 3 ), followed by adding 99.61 mol propylene oxide (C 3 h 6 O), a white gel-like precipitate was obtained after stirring for 30 hours. The precipitate was dried under air atmosphere at 60°C for 24 hours, then calcined and synthesized in a muffle furnace at 1100°C, and kept for 2 hours to obtain submicron 0.5mol%Ce:Lu 2 SiO 5 Luminous powder.

[0029] The obtained powder was first placed in a stainless steel mold with an inner diameter of Φ10 mm, and double-pressed under a pressure of 1 MPa, and then the sample was sealed and pressed under a cold isostatic pressure of 200 MPa to form a powder with a relative density of 51%. Plain embryo. Finally, place the shaped green body in a hydrogen furnace for H 2 Pressureless sintering process under...

Embodiment 2

[0031] 40 g of lutetium chloride (LuCl 3 ) and 16.1 ml of tetraethyl orthosilicate (Si(C 2 h 5 O) 4 ) dissolved in 142.5 ml of isopropanol ((CH 3 O) 2 CHOH), add another 0.68 ml concentration of 0.522 mol / L cerium nitrate (Ce(NO 3 ) 3 ), followed by adding 199.22 mol propylene oxide (C 3 h 6 O), a white gel-like precipitate was obtained after stirring for 30 hours. The precipitate was dried under air atmosphere at 60°C for 24 hours, then calcined and synthesized in a muffle furnace at 1100°C, and kept for 2 hours to obtain submicron 0.25mol% Ce:Lu 2 SiO 5 Luminous powder.

[0032] The obtained powder was first placed in a stainless steel mold with an inner diameter of Φ20 mm, and double-pressed under a pressure of 4 MPa, and then the sample was pressed under a cold isostatic pressure of 200 MPa to form a green body with a relative density of 50%. . Finally, put the formed blank in a hydrogen furnace through a reducing atmosphere pressureless sintering process, and ...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing Ce:Lu2SiO5 polycrystalline scintillation optical ceramics by adopting a pressureless sintering process, which belongs to the technical field of rare earth-doped polycrystalline scintillation optical ceramics preparation technology. The present invention adopts the sol-gel method to synthesize single-phase submicron Ce:Lu2SiO5 ceramic powder at low temperature, and after the above-mentioned powder is formed by dry pressing and isostatic pressing, it is subjected to pressureless processing at 1600-1800 °C under the condition of flowing H2 atmosphere. Sintering to obtain Ce: Lu2SiO5 polycrystalline scintillation optical ceramics. The relative density of the obtained material reaches more than 98.5% of the theoretical density, exhibits good luminous behavior under X-ray excitation, and the main emission peak is located at 440nm.

Description

technical field [0001] The present invention relates to Lu 2 SiO 5 as the matrix, Ce 3+ A method for the preparation of polycrystalline scintillation optical ceramics in which ions are active ions, more precisely it involves the low-temperature synthesis of Ce:Lu by sol-gel method 2 SiO 5 Powder and its H 2 The invention relates to a pressureless sintering densification method in an atmosphere, which belongs to the technical field of scintillation optical ceramics preparation. Background technique [0002] In 1983, the ceramic laboratory of GE Company in the United States first developed a ceramic scintillator named HiLight (Eu-doped Y 2 o 3 / Gd 2 o 3 Solid solution transparent ceramics), pioneered the research and development of ceramic scintillators, and then Hitachi Metals and Siemens developed Gd 2 o 2 S: Pr, Ce, F and Gd 2 o 2 S:Pr (UFC) ceramic scintillator. In the binary Re 2 o 3 -SiO 2 (where Re=Lu 3+ , Y 3+ 、Gd 3+ ) In the rare earth silicate syst...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/16C04B35/50C04B35/64
Inventor 施鹰林挺邓莲芸任玉英谢建军
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com