Pressureless sintering preparation method of Ce:Lu2SiO5 polycrystal flicker optical ceramics

An optical ceramics and preparation process technology, applied in the field of preparation of polycrystalline scintillation optical ceramics, can solve the problems of sample contamination, cracking, increase equipment requirements, etc., and achieve the effects of reducing intermediate steps, simplifying the preparation process, and fast decay characteristics
CN102557598AInactive Publication Date: 2012-07-11SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2012-07-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing Ce:Lu2SiO5 polycrystal flicker optical ceramics by adopting a pressureless sintering process, which belongs to the technical field of a preparation process of rare earth doped polycrystal flicker optical ceramics. The method adopts a sol-gel method to compose signal-phase sub-micron level Ce:Lu2SiO5 ceramic powder at low temperature, dry pressing and isostatic pressing are carried out on the powder, then pressureless sintering is carried out on the powder at 1600-1800 DEG C under flowing H2 atmosphere condition to obtain the Ce:Lu2SiO5 polycrystal flicker optical ceramics. relative density of the obtained materials achieves more than 98.5% of the theoretical density, has good lighting acts under stimulation of the X-ray, and a main emission peak is located at 440nm.
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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

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