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Preparation of Isotopically Enriched Polycrystalline Germanium via Monogermane Pyrolysis
- Source :
- Inorganic Materials. 56:223-228
- Publication Year :
- 2020
- Publisher :
- Pleiades Publishing Ltd, 2020.
-
Abstract
- High-purity isotopically enriched germanium has been prepared by a hydride method, and the main factors capable of reducing the germanium yield in the monogermane pyrolysis process have been identified. To raise the germanium yield, we have optimized pyrolysis conditions in a laboratory-scale flow apparatus. At a monogermane flow rate at the reactor inlet of 30 mL/min, the optimal monogermane decomposition temperature is 420–450°C. Such conditions ensure a decomposition rate of ~6 g/h and a high product yield and make it possible to obtain most of the germanium in polycrystalline form. Using isotopically enriched monogermane pyrolysis, we have obtained high-purity isotopically enriched germanium samples in the form of polycrystalline ingots with a yield above 95%. The ingots are n-type and range in resistivity from 25 to 50 Ω cm. The content of regulated impurities in the 72Ge-,73Ge-, 74Ge-, and 76Ge-enriched germanium ingots thus prepared does not exceed 0.01 to 1 ppm by weight.
- Subjects :
- 010302 applied physics
Materials science
Hydride
General Chemical Engineering
Thermal decomposition
Metals and Alloys
Analytical chemistry
chemistry.chemical_element
Germanium
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Decomposition
Inorganic Chemistry
chemistry
Impurity
Yield (chemistry)
0103 physical sciences
Materials Chemistry
Crystallite
0210 nano-technology
Pyrolysis
Subjects
Details
- ISSN :
- 16083172 and 00201685
- Volume :
- 56
- Database :
- OpenAIRE
- Journal :
- Inorganic Materials
- Accession number :
- edsair.doi...........cd53eb78036ca91bc5450eb591edf9d2