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Growing method for large scale CuI crystal

A growth method and large-size technology, applied in the field of growth of large-size CuI crystals, to achieve the effect of low price, simple equipment and large size

Inactive Publication Date: 2010-02-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no relevant reports on the combination of solution cooling and solvent evaporation in the growth of CuI crystals by the solution method at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of CuI Transparent Scintillation Crystals

[0018] At room temperature, add 1.5g of cuprous iodide powder into a beaker containing 45ml of acetonitrile solution, seal the beaker with plastic wrap, and after stirring for 5 minutes, filter the solution with a filter membrane with a pore size of 0.15 microns, and take the filtrate Pour 40ml into a 50ml volumetric flask, then slowly place the volumetric flask in a shockproof freezer at 5±0.5°C, place the volumetric flask in a container with a small amount of water, and form regular CuI crystals after standing for 5 days, choose a suitable crystal as seed crystals. Then repeat the process of preparing the solution above. After the solution is filtered through a 0.1 micron ultra-fine microporous membrane, it is added to the culture tank of the solution method cooling device, and the temperature of the solution in the growth area is set to 3°C above room temperature. For the seed crystal, start cooling at a rate o...

Embodiment 2

[0020] Preparation of CuI Transparent Scintillation Crystals

[0021] At 30 degrees Celsius, add 4.5g of cuprous iodide powder into a beaker containing 90ml of acetonitrile solution, seal the beaker with plastic wrap, and after stirring for 5 minutes, filter the solution with a filter membrane with a pore size of 0.15 microns. Pour 80ml of the solution into a 100ml volumetric flask, then slowly place the volumetric flask in a shockproof freezer at 15±0.5°C, place the volumetric flask in a container with a small amount of water, and form regular CuI crystals after standing for 5 days, choose a suitable crystals as seeds. Then repeat the process of preparing the solution above. After the solution is filtered through a 0.1 micron ultrafine microporous membrane, it is added to the culture tank of the solution method cooling device, and the temperature of the solution in the growth area is set to 35 ° C. After 36 hours, the seed crystal is placed. , start cooling at a rate of 3°C / ...

Embodiment 3

[0023] Preparation of CuI Transparent Scintillation Crystals

[0024] At 45 degrees Celsius, add 14g of cuprous iodide powder into a beaker containing 250ml of acetonitrile solution, seal the beaker with plastic wrap, and after stirring for 5 minutes, filter the solution with a filter membrane with a pore size of 0.2 microns, and take the filtrate Pour 200ml into a 250ml volumetric flask, then slowly place the volumetric flask in a shockproof incubator at 20±0.5°C, place the volumetric flask in a container with a small amount of water, and form regular CuI crystals after standing for 5 days, choose a suitable crystals as seeds. Then repeat the process of preparing the solution above. After the solution is filtered through a 0.1 micron ultrafine microporous membrane, it is added to the culture tank of the solution method cooling device, and the temperature of the solution in the growth area is set to 50 ° C. After 28 hours, put the seed crystal , start cooling at a rate of 2°C...

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Abstract

The invention belongs to the technology filed of crystalgrowing, which specifically relates to a crystalgrowing method for a large size CuI crystalloid. The invention uses a technology of combining solution cooling with solvent evaporation, and has the advantage of a simple device, cheap price, a low temperature for growing, simple adjustment in a growing process. The crystalloid is of cuboid shaped, and has a centimeter-class size. CuI crystalloid is grown in gamma phase, and has high purity, fewer defects, nice appearance, large size, then the CuI crystalloid is used for a next generation ultra-fast scintillator, and has important value of ultra-high speed X-rays, gamma rays and an electron beam measurement, meanwhile is also used for a fast ionic conductor.

Description

technical field [0001] The invention belongs to the technical field of crystal growth, and in particular relates to a method for growing large-sized CuI crystals. Background technique [0002] With the rapid development of high-energy physics, nuclear physics and nuclear technology applications, the usual inorganic scintillation crystals are difficult to meet the needs of ultra-high count rate measurement. Therefore, in recent years, countries are actively conducting research on new ultra-fast scintillator. Wide-bandgap semiconductor material copper iodide (CuI) crystal has extremely fast scintillation characteristics at room temperature, its luminescence decay time is only 90ps, and there is no slow component, it is one of the fastest inorganic scintillation crystals known so far , so as a new generation of ultrafast scintillator, it has important application value in ultrahigh count rate X-ray, γ-ray and electron beam measurement. The light yield of CuI crystal is BaF 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B7/08
Inventor 顾牡高攀刘小林黄世明刘波张甜
Owner TONGJI UNIV