Optimization of Growth Conditions of Shaped Crystals
All variations of the Stepanov method are based on two generic schemes in which a shaper either wetted or unwetted by the melt is used. Thus, the degree of wettability, determined by the wetting angle ϕ, of the shaper by the melt is important. The wetting angle is minimal in the traditional Stepanov method with the shaper not wetted by the melt. In this instance, the shaped crystals that are grown more accurately reproduce the geometry of the shaper, including those grown with a large cross section. The wetting angle is maximal in the Stepanov method with a wetted shaper. In these variations, the meniscus remains low. For this reason, the growth process becomes more stable and the melt is fed well from the crucible through the shaper capillary.
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