Preparation, structure and peritectic transition of La{sub 1.5{minus}x/2}Sr{sub x}Ba{sub 1.5{minus}x/2}Cu{sub 3}O{sub y} superconductors

Journal Article · Thu Oct 31 23:00:00 EST 1996 · Materials Research Bulletin

DOI:https://doi.org/10.1016/0025-5408(96)00130-4· OSTI ID:415473

Yuan, C C; Kao, H C.I.; Wang, C M ^[1]

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1. Tamkang Univ., Tamsui (Taiwan, Province of China). Dept. of Chemistry

A series of single phase La{sub 1.5{minus}x/2}Sr{sub x}Ba{sub 1.5{minus}x/2}Cu{sub 3}O{sub y} (0 {le} x {le} 0.80) compounds with a tetragonal triple-perovskite unit-cell have been prepared by solid-state reaction. With increasing x, unit-cell {alpha} axis, volume, density, and peritectic transition temperature (T{sub p}) of La{sub 1.5{minus}x/2}Sr{sub x}Ba{sub 1.5{minus}x/2}Cu{sub 3}O{sub y} decrease monotonically. The peak position of T{sub p} measured in the 25 mL/min flowing O{sub 2} atmosphere and 10 C/min heating rate decreases from 1,105 to 1,080 C as x increases from 0 to 0.80. The oxygen atom loss in the peritectic transition is 0.38 {+-} 0.05 O-atom{center_dot}mole{sup {minus}1}.

• OSTI ID: 415473
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 31; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BARIUM OXIDES
CALCINATION
CALORIMETRY
COPPER OXIDES
CRYSTAL STRUCTURE
DENSITY
DIFFERENTIAL THERMAL ANALYSIS
IMPURITIES
LANTHANUM OXIDES
PEROVSKITE
POWDERS
SINTERING
SOLUBILITY
STRONTIUM OXIDES
TETRAGONAL LATTICES
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION