Preparing of precursors for yttrium-containing ceramic superconductors

Patent · Tue Feb 13 04:00:00 EST 1990

OSTI ID:6911394

Snyder, T S; Stoltz, R A

This patent describes a process for extracting a yttrium component from a rare earth ore, or rare earth ore concentrate, containing rare earth values and using the yttrium component to prepare a composite for use in fabrication of a metal oxide ceramic superconductor containing yttrium oxide. It comprises: feeding the rare earth ore or ore concentrate to a fluidized bed chlorinator to produce a chloride of the yttrium component and chlorides other rare earths contained in the ore; separating the yttrium chloride by differential condensation from the other rare earth chlorides at 725--1200{degrees}C; anhydrously reacting the separated the yttrium chloride with at least one alkoxide reactant selected from the group consisting of the alkali metal alkoxides to produce yttrium alkoxide and separating the yttrium alkoxide from reaction by-products and excess reagents; and mixing the yttrium alkoxide with alkoxides of other non-oxygen constituents of the metal oxide ceramic superconductor, thereby producing an alkoxide composite. The composite is useful for fabrication of a metal oxide ceramic superconductor.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): A; US 4900536
• Application Number: PPN: US 7-121016A
• OSTI ID: 6911394
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALI METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DECOMPOSITION
HALIDES
HALOGEN COMPOUNDS
HYDROLYSIS
LYSIS
ORE CONCENTRATES
OXIDES
OXYGEN COMPOUNDS
PRECURSOR
PRODUCTION
SEPARATION PROCESSES
SOLVOLYSIS
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES