Process for making Tl-Ba-Ca-Cu-O superconductors

Patent · Tue Mar 05 00:00:00 EST 1991

OSTI ID:5412079

Hermann, A M; Sheng, Z

This patent describes a method for making high temperature superconductors. It comprises: grinding a mixture of a compound selected from the groups consisting of CaCO{sub 3}, CaO, a compound selected from the group consisting of BaCO{sub 3} and BaO{sub 2}, and CuO and heating the ground mixture to obtain a uniform black Ba-Ca-Cu-O powder, the powder includes a mixture of BaCO{sub 3}, CaCO{sub 3}, and CuO with a molar ratio of 2:3:3; pressing the resulting Ba-Ca-Cu-O powder into a pellet, heating the pellet; allowing the pellet to cool; placing the pellet near an amount of Tl{sub 2}O{sub 3}; heating the pellet and Tl{sub 2}O{sub 3}; and allow a resultant product to cool.

• Assignee: Univ. of Arkansas, Little Rock, AR (USA)
• Patent Number(s): US 4997811; A
• Application Number: PPN: US 7-308896
• OSTI ID: 5412079
• Resource Relation: Patent File Date: 9 Feb 1989
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
SYNTHESIS
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
TITANIUM OXIDES
PELLETIZING
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
FABRICATION
MOLDING
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication