Influence of sintering time and quenching on the formation of high Tc phase
- 1. Osmania Univ., Hyderabad (India). Dept. of Physics
Description
Influence of sintering time and quenching in Bisub(2-x)PbxCa2Sr2Cu3Oy (x=0.0, 0.1, 0.2, 0.25, 0.3 and 0.4) samples have been studied by resistance and XRD measurements. In samples sintered at 850degC for 4 days, Tc(O) increases with Pb concentration. Tc(O) increased from 81 K for x=0.0 to 109 K in x=0.30 sample and then decreased. Increasing the sintering time to 10 days decreased the Tc. Quenching further decreased the Tc(O). From X-ray diffraction patterns, the intensity peaks of low and high Tc phases have been measured. The addition of Pb promotes high Tc-phase. Sintering time, slow cooling and rapid quenching studies show that there is an optimum sintering time and cooling rate to produce a high Tc-phase. (author). 9 refs., 6 figs., 2 tabs
Additional details
Publishing Information
- Journal Title
- Bulletin of Materials Science
- Journal Volume
- 14
- Journal Issue
- 2
- Series
- Bull. Mater. Sci.
- Journal Page Range
- 199-206
- ISSN
- 0250-4707
- CODEN
- BUMSD
Conference
- Title
- International conference on superconductivity.
- Dates
- 10-14 Jan 1990.
- Place
- Bangalore (India).
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 23057483
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BISMUTH OXIDES; CHEMICAL PREPARATION; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; LEAD OXIDES; PHASE STUDIES; QUENCHING; SINTERING; STRONTIUM OXIDES; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; FABRICATION; HEAT TREATMENTS; LEAD COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS