Growing of Single Crystals of Zinc, Bismuth and White Tin by the Bridgman Method
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概要
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We have studied on the effects of various growing conditions on the yield percentage as well as orientation distribution of round-bar single crystals of zinc, bismuth, and white tin as grown by the Bridgman method. In order to prepare the ingots which are to be converted into single crystal, molten zinc was poured in air or in vacuum or sucked up into soft glass tubes, and it has been found that the vacuum casting is not practical and the suction casting is the best. The higher is the purity of the material, the greater is the degree of success. The yield percentage falls very much when remelted zinc is used. It has been found, from the experiments on the production of single crystals from ingots made by sucking up, that, with increasing speed of lowering the crucible, the yield percentage decreases approximately linearly for zinc and white tin single crystals and approximately exponentially for bismuth single crystals. Irrespective of the lowering speed of the crucible, zinc single crystals having such an orientation that the angle θ which the rod axis makes with the c axis ranges from 75 to 85°are preferentially obtained, and bismuth single crystals with θ≧70°are grown most easily while bismuth single crystals with θ≧10〜40°are difficult to grow. In white tin single crystals, the <110> direction predominates at fast lowering rate of the crucible. Single crystals of any orientation are produced at low lowering speeds, while those of small θ are hardly obtained at higher lowering speeds. The purity of the materials does not seem to affect the orientation distribution.
- 東北大学の論文
著者
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Watanabe Jiro
The Research Institute for Iron, Steel and Other Metals, Tohoku University
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Yamamoto Mikio
The Research Institute For Iron Steel And Other Metals
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Watanabe Jiro
The Research Institute For Iron Steel And Other Metals
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Yamamoto M.
The Research Institute for Iron, Steel and Other Metals
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