Mold guiding plate for growing sapphire crystals by virtue of EFG method

Abstract

The invention relates to a mold guiding plate for growing sapphire crystals by virtue of an EFG method. A V-shaped groove (3) which is sunken downward is formed in the discharge end of a mold guiding plate main body, and sunken surfaces (2) which are sunken inward are separately formed in two side faces of the mold guiding plate, so that a structure, the middle part of which is thin and the two ends of which are thick, is formed in the mold guiding plate. According to the mold guiding plate provided by the invention, the processed thermal filed environment is improved, and the processing temperature is lowered, so that the two sides and the middle position are located on a same isothermal line. Compared with the prior art, the drawing speed is accelerated, the production efficiency is improved, and meanwhile, the local temperature of the mold guiding plate is changed, so that crystallization of crystals is facilitated, the problem of shrinking crystals is solved, the intactness of the crystals is ensured, and meanwhile, the local widths of the two ends of the mold guiding plate are further increased, the problem that the width of the crystals is decreased as the temperature is increased, the operation of drawing the crystals is facilitated, the control and adjustment range and the like is increased, and the mold guiding plate is suitable for large-scaled popularization and application.

Description

[0001] 【Technical field】 [0002] The invention relates to a guide template, in particular to a guide template for growing sapphire crystals by a guide mode method. [0003] 【Background technique】 [0004] Known, sapphire (Sapphire) is a kind of aluminum oxide (αA1 2 0 3 ) single crystal, also known as corundum. Corundum crystal has excellent optical, electrical and mechanical properties, and its hardness is second only to diamond. It has the characteristics of high mechanical strength, stable chemical performance at high temperature, good thermal conductivity, high insulation, and small friction coefficient. Sapphire is widely used in semiconductor devices, optoelectronic devices, lasers, vacuum devices, precision machinery, etc. Especially containing Ti 4+ Sapphire is an excellent solid-state broadband tunable laser material, which can be used to make ultra-powerful femtosecond-level tunable lasers. The artificial synthesis of high-quality gemstone crystals is an import...

AI Technical Summary

Problems solved by technology

[0007] a. Since the guide plate adopts an equal-width structure, the temperature at the outer edge of the guide plate close to the heating element is high and it is not easy to feed materials, resulting in shrinkage of the crystal plate;

[0008] b. Since the guide plate adopts an equal-width structure, as the crystal plate is drawn longer and longer, the temperature of the guide plate near the heating element is getting higher and higher, resulting in inconsistent width of the drawn crystal;

[0009] c. Since the guide plate adopts an equal-width structure, the drawing speed needs to be reduced to ensure the crystal thickness after the outer temperature is high, resulting in a decrease in production efficiency

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