Liquid phase sintered superconducting cermet

Patent · Tue Jan 09 04:00:00 EST 1990

OSTI ID:7009913

Ray, S P

This patent describes a method of making a superconducting cermet having superconducting properties with improved bulk density, low porosity and in situ stabilization. It comprises: forming a structure of a superconducting ceramic material having the formula RM{sub 2}Cu{sub 3}O{sub (6.5 + x)}wherein R is one or more rare earth elements capable of reacting to form a superconducting ceramic, M is one or more alkaline earth metal elements selected from barium and strontium capable of reacting to form a superconducting ceramic, x is greater than 0 and less than 0.5; and a precious metal compound in solid form selected from the class consisting of oxides, sulfides and halides of silver; and liquid phase sintering the mixture at a temperature wherein the precious metal of the precious metal compound is molten and below the melting point of the ceramic material. The liquid phase sintering is carried out for a time less than 36 hours but sufficient to improve the bulk density of the cermet.

• Assignee: Aluminum Co. of America, Pittsburgh, PA
• Patent Number(s): A; US 4892861
• Application Number: PPN: US 7085959A
• OSTI ID: 7009913
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CERMETS
CHALCOGENIDES
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILVER COMPOUNDS
SILVER SULFIDES
SINTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS