Synthesis of binary copper chalcogenides by mechanical alloying
- Okayama Univ. of Science (Japan). Lab. for Solid State Chemistry
Copper sulfides (tetragonal Cu{sub 1.92}S-Cu{sub 1.99}S, rhombohedral Cu{sub 1.71}S-Cu{sub 1.89}S, CuS) selenides ({beta} Cu{sub 2{minus}x}Se, Cu{sub 3}Se{sub 2}, {gamma} CuSe, CuSe{sub 2}), and tellurides (Cu{sub 2{minus}x}Te, Cu{sub 3}Te{sub 2}) were prepared from mixtures of the elements by mechanical alloying (MA), using a high-energy ball mill. The compounds were obtained by 60--120 min of MA. It is notable that two metastable high-pressure phases were obtained by MA: tetragonal Cu{sub 2{minus}x}S and pyrite-type CuSe{sub 2}. The tetragonal phase gradually transformed to the stable phase of djurleite when kept at room temperature. Cu{sub 1.71}S-Cu{sub 1.89}S also formed a metastable rhombohedral phase.
- OSTI ID:
- 175861
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 30; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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