Crystal quick growth device using solution method

Abstract

This invention relates to a kind of rapid growth device of crystal by solution method. It composed of side Infra- red heating light, growth container, crystal rotation device and temperature automatic control system. The growth container includes column wall, taper wall, taper top glass column, round bottom, and bottom heating plate. On bottom of growth container or taper top, there is flat-bottomed round bottom, on which is the solid taper glass column which is located at the center of flat bottom. The crystal is grew on lower part of growth container. The outside of bottom is the heating board with same area and shape. On the bottom of growth container is the taper wall that concentrate the secondary nucleation of crystal during its growth to its bottom under the influence of gravitation and solution convection. On top of the taper wall is the column wall connected and sealed with it. It is simple, cheap, and easy to use and the crystal is fast grew and has good quality.

Description

Technical field: [0001] The invention relates to a solution-method rapid crystal growth device in the technical field of crystal growth, which belongs to a crystal growth container suitable for the cooling method, solvent evaporation method and solution circulation flow method, and can prevent miscellaneous crystals from appearing at the bottom of the growth container during the crystal growth process, increasing the Solution stability. technical background: [0002] Crystal growth in solution usually includes cooling method, solvent evaporation method and solution circulation method. The principle is to obtain a supersaturated solution by cooling down, reducing solvent and adding solute, and crystals grow in the supersaturated solution. The supersaturated state of the solution is a metastable state. Due to the unavoidable existence of some impurity particles and the agglomeration of growth units in the solution, the solution is prone to non-uniform nucleation, especially i...

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Problems solved by technology

However, the additives introduce impurities, which reduces the purity of the growth solution, and may introduce impurities into the crystal, affecting the quality of the crystal

The growth vessel used in the above method is generally a cylindrical glass cylinder, the bottom of which is flat, and the angle between the bottom surface and the side wall is 90 degrees. When the stability of the solution is affected, miscellaneous crystals will appear at the bottom of the cylinder, and the side wall There are no miscellaneous crystals on the surface, which makes the large-area circular tank bottom a place where miscellaneous crystals are easy to form and grow

In addition, the method of heating at the bottom of the tank is difficult to form a large temperature gradient due to the low viscosity of the aqueous solution and the strong convection effect, and the effect of increasing the stability of the solution is not obvious, which cannot meet the needs of rapid crystal growth.

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