Single crystal combined raw material moulding technological design with high loading density

Abstract

The invention relates to single crystal combined raw material moulding technological design with high loading density. The technological design comprises the steps of 1, drawing an inner wall stereoscopic picture of a crucible; 2, calculating the theoretical volume of the crucible; 3, conducting physical property analysis on a single crystal material; 4, determining the weight of a single crystal raw material which needs to be loaded; 5, determining a stereoscopic splitting mode of the internal space of the crucible; 6, testing a powder forming parameter of the single crystal raw material and building a database; 7, determining a moulding technology scheme and conducting technological calculation; 8, selecting the type of a mould; 9, selecting moulding equipment; 10, programming a moulding technological card. According to the disclosed single crystal combined raw material moulding technological design with the high loading density, the design process is reasonable and scientific, the process is simple and controllable, and moulding production of the single crystal raw material is easy to achieve; meanwhile, the single crystal combined raw material is designed according to the actual size of the crucible, thus the single crystal combined raw material is convenient to use, free of gap and high in loading density, ordered loading of the single crystal raw material is achieved, standardized operation of the growth of the single crystal is promoted, and the equipment using rate is increased; the single crystal combined raw material moulding technological design has obvious social and economic benefit.

Description

technical field [0001] The invention relates to a high packing density single crystal composite raw material molding process design, which is especially suitable for processing the high packing density single crystal composite raw material molding process design with a crucible inner diameter greater than 200 mm. Background technique [0002] At present, the raw materials used in the known process of growing single crystals through raw material melting are: powder, pellets, cakes, and crushed crystals. In order to obtain a higher packing density of raw materials and a higher utilization rate of the crucible, generally denser granular materials, cake materials and crushed crystal materials are used. However, due to the limitation of the size and shape of the raw materials, the partial or overall disordered accumulation of the raw materials during the filling process results in the uncontrollability of the filling density and the instability of the weight of the raw materials;...

AI Technical Summary

Problems solved by technology

Due to the instability of raw material loading weight and volume, the reproducibility of process parameters is eventually poor, which not only affects the standardization of single crystal growth process, but also seriously affects the final single crystal quality

The existing single crystal raw material molding process is difficult to solve these problems, and cannot meet the customer's requirements for orderly loading of single crystal raw materials, standardized single crystal growth, and increased crucible utilization.