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Multi-crucible gradient condensation crystal growth device and method for growing large-size lanthanum bromide single crystal by using same

A technology of crystal growth and gradient condensation, applied in the directions of crystal growth, polycrystalline material growth, single crystal growth, etc., can solve the problems of easy cracking and poor single crystal quality, so as to alleviate the cracking problem, reduce internal stress, and reduce production costs Effect

Active Publication Date: 2019-12-20
哈尔滨元雅新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problems of poor single crystal quality and easy cracking in the existing lanthanum bromide single crystal growth method, and provides a multi-crucible gradient condensation crystal growth device and its method for growing large-sized lanthanum bromide single crystals. crystal method

Method used

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  • Multi-crucible gradient condensation crystal growth device and method for growing large-size lanthanum bromide single crystal by using same
  • Multi-crucible gradient condensation crystal growth device and method for growing large-size lanthanum bromide single crystal by using same
  • Multi-crucible gradient condensation crystal growth device and method for growing large-size lanthanum bromide single crystal by using same

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specific Embodiment approach 1

[0031] Specific implementation mode one: (see attached figure 1 , 2 ) The multi-crucible gradient condensation crystal growth device of this embodiment includes a cylindrical double-layer shell 1, a heat preservation cover 2, a lining ceramic tube 3, two sets of external heating coils 4, two sets of internal heating coils 5, and a plurality of temperature-controlling thermoelectric coils. Couple 6, multiple crucible holders 7, multiple quartz crucibles 8;

[0032] The lined ceramic tube 3 is arranged on the axis of the cylindrical double-layer shell 1; a plurality of crucible holders 7 are evenly distributed and fixed in the annular area between the double-layer shell 1 and the lined ceramic tube 3;

[0033] Two sets of external heating coils 4 are respectively arranged on the upper part and the lower part of the double-layer casing 1; and the double-layer casing 1 is provided with an insulating layer;

[0034] Two sets of inner heating coils 5 are respectively arranged at t...

specific Embodiment approach 2

[0036] Specific implementation mode two: (see attached image 3 ) The difference between this embodiment and the first embodiment is that the quartz crucible 8 is composed of an upper cylindrical tube 8-1, a lower inverted cone 8-2 and a bottom cylindrical tube 8-3; the others are the same as the first specific embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: This embodiment differs from Embodiment 2 in that the apex angle α of the inverted cone 8-2 at the bottom of the quartz crucible 8 is 30° to 120°; other aspects are the same as Embodiment 2.

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Abstract

The invention discloses a multi-crucible gradient condensation crystal growth device and a method for growing a large-size lanthanum bromide single crystal by using the same, relates to a device and method for growing the lanthanum bromide single crystal, and aims to solve the technical problems of poor single crystal quality and high cracking tendency in a conventional lanthanum bromide single crystal growth method. The device comprises a double-layer shell, a heat preservation cover, a lining ceramic tube, two groups of external heating coils, two groups of internal heating coils, a plurality of temperature control thermocouples, a plurality of crucible supports and a plurality of quartz crucibles, wherein the lining ceramic tube is arranged on the axis of the cylindrical double-layer shell; the plurality of crucible supports are uniformly distributed and fixed in an annular area between the double-layer shell and the lining ceramic tube; the two groups of external heating coils arearranged in the double-layer shell; the two groups of internal heating coils are arranged on the lining ceramic tube. The method comprises the steps: packaging lanthanum bromide seed crystals in the quartz crucibles, putting the quartz crucibles on the crucible supports, and carrying out full-static in-situ gradient condensation cooling growth and annealing to obtain the crack-free large-size lanthanum bromide single crystal. The device and method can be used in the field of crystal growth.

Description

technical field [0001] The invention relates to a device and method for growing large-sized lanthanum bromide single crystal. Background technique [0002] Under the impact of high-energy particles, scintillation crystals can convert the kinetic energy of high-energy particles into light energy and emit light. The combination of scintillation crystals and photomultiplier tubes can be used for the detection of X-rays, γ-rays, neutrons and other high-energy particles. etc. have important applications. [0003] In 2001, the Delft University of Technology in the Netherlands discovered that in Ce 3+ Lanthanum bromide (LaBr) obtained from doped halide crystals 3 :Ce) crystals exhibit excellent scintillation properties: high light output (≥40000Photons / MeV), fast decay time (≤40ns), high energy resolution (≤5%@662keV) and uniform nonlinear response, etc., especially suitable for low Detection of gamma-rays in an intensity mixed field when lanthanum bromide crystals are in the l...

Claims

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Application Information

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IPC IPC(8): C30B11/00C30B29/12
CPCC30B11/00C30B11/002C30B29/12
Inventor 牛晓冉刘涛
Owner 哈尔滨元雅新材料科技有限公司
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