Zone Refinement of Germanium Crystals

2nd Workshop on Germanium Detectors and Technologies

Yang, G.^1 ; Guan, Y.T.^1 ; Jian, F.Y.^1 ; Wagner, M.D.^1 ; Mei, H.^1 ; Wang, G.J.^1 ; Howard, S.M.^2 ; Mei, D.M.^1 ; Nelson, A.^3 ; Marshal, J.^4 ; Fitzgerald, K.^5 ; Tenzin, C.^6 ; Ma, X.^2

Department of Physics, University of South Dakota, Vermillion

SD

57069, United States^1

Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, Rapid City

SD

57701, United States^2

Metallurgical Engineer, North American Stainless, Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, Ghent, Rapid City

SD

57701, United States^3

Mechanical Engineer, Applied Controls Equipment, Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, Denver, Rapid City

SD

57701, United States^4

Metallurgical Engineer, Logan Aluminum, Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, Lewisburg, Rapid City

SD

57701, United States^5

Technical Consultant, WA Formerly Research Assistant and MS Candidate, Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, Wenatchee, Rapid City

SD

57701, United States^6

关键词: A-carbon;    Germanium crystals;    Graphite boat;    High purity;    Hydrogen gas atmosphere;    Impurity level;    One-step process;    Purity level;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/606/1/012014/pdf
DOI  :  10.1088/1742-6596/606/1/012014

来源: IOP

【 摘 要 】

Purification of commercial germanium with an impurity level of ∼1013-14cm-3was successfully conducted in two-step zone refining process under an undiluted high-purity hydrogen gas atmosphere. Results for the first step conducted in graphite boats yielded ingots with an impurity level of ∼1012cm-3near the center of the 60 cm long ingots. These center portions were collected and subsequently zone refined in a high purity quartz boat to reach a purity level of ∼1011cm-3. The best material achieved in a one step process employing a carbon-coated quartz boat yielded material of purity 81011cm-3.