Granular structure and transport properties of Bi(Pb)-Sr-Ca-Cu-O ceramic
Abstract
The percolation structure and processes occurring on the surface of Bi(Pb)-Sr-Ca-Cu-O ceramic granules during heat treatment were investigated experimentally with a view to increasing the critical current density of high-temperature superconductors based on bismuth ceramics. It is shown that the repeat pressing of the ceramic makes it possible to significantly reduce its porosity and create an acicular structure associated with a sharp increase in the critical current density. Critical current densities of 250 A/sq cm for Tc = 110 K and 1000 A/sq cm for 100 K have been obtained.
- Publication:
-
Zhurnal Tekhnicheskoi Fiziki
- Pub Date:
- February 1991
- Bibcode:
- 1991ZhTFi..61..201A
- Keywords:
-
- Current Density;
- Granular Materials;
- Heat Treatment;
- High Temperature Superconductors;
- Mixed Oxides;
- Transport Properties;
- Calcium Oxides;
- Ceramics;
- Copper Oxides;
- Critical Temperature;
- Strontium Compounds;
- Solid-State Physics