High temperature rare earth and Si-Ge thermoelectric materials

Thesis/Dissertation · Thu Jan 21 00:00:00 EST 1993

OSTI ID:10127487

Han, Sang Hyun

This thesis consists of three papers. Paper 1 is concerned with the preparation of metastable crystalline high temperature polymorph of Dy{sub 2}S{sub 3} or metastable crystalline high pressure polymorphs of R{sub 2}S{sub 3} (R = Y, Er, Tm, Yb and Lu) by mechanical milling. In Paper II, copper doped dysprosium sesquisulfide compounds, which have the {eta}-orthorhombic structure, were examined as potential high temperature thermoelectric materials. Paper III deals with the use of mechanical alloying and gaseous state diffusion to extend the electrical activity of phosphorus above the maximum reported equilibrium limit in Si{sub 80}Ge{sub 20} alloys.

• Research Organization: Ames Lab., IA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 10127487
• Report Number(s): IS-T-1636; ON: DE93006913
• Resource Relation: Other Information: TH: Thesis (Ph.D.); PBD: 21 Jan 1993
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DYSPROSIUM SULFIDES
CRYSTAL STRUCTURE
THERMOELECTRIC PROPERTIES
MILLING
YTTRIUM SULFIDES
ERBIUM SULFIDES
THULIUM SULFIDES
YTTERBIUM SULFIDES
LUTETIUM SULFIDES
SILICON ALLOYS
ELECTRICAL PROPERTIES
GERMANIUM ALLOYS
ELECTRON DENSITY
X-RAY DIFFRACTION
LATTICE PARAMETERS
COPPER ADDITIONS
DOPED MATERIALS
EXPERIMENTAL DATA
PHOSPHORUS ADDITIONS
360602
360606
360104
STRUCTURE AND PHASE STUDIES
PHYSICAL PROPERTIES