...A melting method in which a narrow band of heat is created on a rod-shaped solid (metal, semiconductor, ceramic, etc.), melted using a ring heater, and the position of the melting band is moved by moving the heater from one end of the rod to the other. This method was invented by WGP Fann of the United States in 1957, and is used as a method of refining solids and producing single crystals. The equilibrium solubility C S of an impurity (solute) in a solid is generally different from the equilibrium solubility C L of the impurity when the solid is in a molten liquid state. ... *Some of the terminology that mentions "Pfann, WG" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…棒状の固体(金属,半導体,セラミックスなど)に狭い幅の帯状の加熱部分をつくり,環状ヒーターを用いて融解し,ヒーターの位置を棒の一端から他端へ移動させることにより融解帯の位置を順次移動させる融解法。1957年アメリカのファーンW.G.Pfannによって考案されたもので,固体の精製と単結晶作製の一手段として用いられる。 不純物(溶質)の固体中への平衡溶解度CSは,固体が融液となっている場合の不純物の平衡溶解度CLと一般に異なる。… ※「Pfann,W.G.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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