A device for spontaneous nucleation and growth of dast crystals at the bottom of a square pyramid

Abstract

The invention belongs to the technical field of solution-process crystal growth equipment, and relates to a square rectangular-pyramid-bottom DAST (diethylaminosulfurtrifluoride) crystal growth device. A square glass growth tank is arranged in a water bath, and the water bath is contained in a water bath tank; the top end of the square glass growth tank is provided with a flanged glass frosted port; a square frosted glass cover is arranged on the flanged glass frosted port; the bottom of the square glass growth tank is provided with a polytetrafluoroethylene rectangular pyramid; four pyramidal surfaces of the polytetrafluoroethylene rectangular pyramid are provided with parallel V-shaped straight elongated slots; a thermocouple is vertically arranged in the water bath; the thermocouple is connected with a temperature-controlled meter; the temperature-controlled meter is respectively connected with infrared heating lamps on both sides of the water bath tank; and the water bath controls the temperature of the DAST growth solution through the infrared heating lamps and temperature-controlled meter. The square rectangular-pyramid-bottom DAST crystal growth device has the advantages of simple structure and low cost, is simple to assemble and convenient to operate, can greatly increase the effective area for growing crystals in the crystal growth tank, and enhances the DAST crystal production efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of solution-method crystal growth equipment, and relates to a solution cooling growth method for organic nonlinear optical crystals, in particular to a square pyramid-bottomed DAST crystal spontaneous nucleation and growth device. The special design of the plate greatly increases the effective area of ​​the crystal-carrying inclined plate that can be used to grow crystals, improves the production efficiency of DAST crystals, and at the same time eliminates the spontaneous nucleation crystal growth outside the crystal-carrying inclined plate, effectively improving the stability of crystal growth, and thus greatly Improving the quality of DAST crystals grown by inclined plate spontaneous nucleation method. Background technique: [0002] Terahertz wave (THz) refers to electromagnetic waves with a frequency in the range of 0.1-10THz. This band is in the edge spectrum area of ​​traditional electronics and photon...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of small effective area, low crystal production efficiency and poor crystal growth stability of the crystal-carrying inclined plate in the process of growing DAST crystal by the existing inclined plate spontaneous nucleation method, aiming at the existing inclined plate spontaneous nucleation According to the problems existing in the design of the method growth device and the properties and characteristics of DAST crystals, a design is sought to provide a square pyramid-bottomed DAST crystal spontaneous nucleation growth device, which adopts a square growth tank design, and grooves are engraved on the bottom of the square growth tank. The rectangular pyramid-shaped polytetrafluoroethylene material crystal growth slope of the groove realizes effective matching and docking with the square growth cylinder, increases the effective area of ​​the slope plate for crystal growth, and effectively improves the stability and growth efficiency of crystal growth

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