Improved method for preparing rare earth sesquichalcogenides
Abstract
An improved method for the preparation of high purity rare earth sesquichalcogenides is described. The rare earth, as one or more pieces of the metal, is sealed under a vacuum with a stoichiometric amount of sulfur or selenium and a small amount of iodine into a quartz reaction vessel. The sealed vessel is then heated to above the vaporization temperature of the chalcogen and below the melting temperature of the rare earth metal and maintained until the product has been formed. The iodine is then vaporized off leaving a pure product. The rare earth sulfides and selenides thus formed are useful as semiconductors and as thermoelectric generators. 3 tables.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6771209
- Patent Number(s):
- 6368199
- Application Number:
- ON: DE83006892
- Assignee:
- OSTI; ERA-08-018344; EDB-83-050976
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B24 - GRINDING B24D - TOOLS FOR GRINDING, BUFFING, OR SHARPENING
- DOE Contract Number:
- W-7405-ENG-82
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CERIUM SELENIDES; CHEMICAL PREPARATION; CHEMICAL REACTIONS; ELECTRIC CONDUCTIVITY; SEEBECK EFFECT; CHALCOGENIDES; DYSPROSIUM SULFIDES; GADOLINIUM SULFIDES; LANTHANUM SELENIDES; LUTETIUM SULFIDES; NEODYMIUM SULFIDES; RARE EARTHS; SCANDIUM SULFIDES; SELENIUM; SULFUR; YTTRIUM SULFIDES; EXPERIMENTAL DATA; IODINE; SEMICONDUCTOR MATERIALS; THERMOELECTRIC GENERATORS; VERY HIGH TEMPERATURE; X-RAY DIFFRACTION; CERIUM COMPOUNDS; COHERENT SCATTERING; DATA; DIFFRACTION; DIRECT ENERGY CONVERTERS; DYSPROSIUM COMPOUNDS; ELECTRICAL PROPERTIES; ELEMENTS; GADOLINIUM COMPOUNDS; HALOGENS; INFORMATION; LANTHANUM COMPOUNDS; LUTETIUM COMPOUNDS; MATERIALS; METALS; NEODYMIUM COMPOUNDS; NONMETALS; NUMERICAL DATA; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCANDIUM COMPOUNDS; SCATTERING; SELENIDES; SELENIUM COMPOUNDS; SEMIMETALS; SULFIDES; SULFUR COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; NESDPS Office of Nuclear Energy Space and Defense Power Systems; 400201* - Chemical & Physicochemical Properties
Citation Formats
Takeshita, T, Beaudry, B J, and Gschneidner, Jr, K A. Improved method for preparing rare earth sesquichalcogenides. United States: N. p., 1982.
Web.
Takeshita, T, Beaudry, B J, & Gschneidner, Jr, K A. Improved method for preparing rare earth sesquichalcogenides. United States.
Takeshita, T, Beaudry, B J, and Gschneidner, Jr, K A. Wed .
"Improved method for preparing rare earth sesquichalcogenides". United States. https://www.osti.gov/servlets/purl/6771209.
@article{osti_6771209,
title = {Improved method for preparing rare earth sesquichalcogenides},
author = {Takeshita, T and Beaudry, B J and Gschneidner, Jr, K A},
abstractNote = {An improved method for the preparation of high purity rare earth sesquichalcogenides is described. The rare earth, as one or more pieces of the metal, is sealed under a vacuum with a stoichiometric amount of sulfur or selenium and a small amount of iodine into a quartz reaction vessel. The sealed vessel is then heated to above the vaporization temperature of the chalcogen and below the melting temperature of the rare earth metal and maintained until the product has been formed. The iodine is then vaporized off leaving a pure product. The rare earth sulfides and selenides thus formed are useful as semiconductors and as thermoelectric generators. 3 tables.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 14 00:00:00 EST 1982},
month = {Wed Apr 14 00:00:00 EST 1982}
}
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