Yttrium barium copper oxide

Yttrium barium copper oxide
Yttrium barium copper oxide structure
Yttrium barium copper oxide crystal
Names
IUPAC name
barium copper yttrium oxide
Other names
YBCO, Y123, yttrium barium cuprate
Identifiers
ChemSpider
ECHA InfoCard 100.121.379 Edit this at Wikidata
EC Number
  • 619-720-7
Properties
YBa2Cu3O7
Molar mass 666.19 g/mol
Appearance Black solid
Density 6.4 g/cm3[1][2]
Melting point >1000 °C
Insoluble
Structure
Based on the perovskite structure.
Orthorhombic
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H315, H319, H335
P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
Related compounds
Cuprate superconductors
Related compounds
Yttrium(III) oxide
Barium oxide
Copper(II) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Yttrium barium copper oxide (YBCO) is a family of crystalline chemical compounds that display high-temperature superconductivity; it includes the first material ever discovered to become superconducting above the boiling point of liquid nitrogen [77 K (−196.2 °C; −321.1 °F)] at about 93 K (−180.2 °C; −292.3 °F).[3]

Many YBCO compounds have the general formula YBa2Cu3O7−x (also known as Y123), although materials with other Y:Ba:Cu ratios exist, such as YBa2Cu4Oy (Y124) or Y2Ba4Cu7Oy (Y247). At present, there is no singularly recognised theory for high-temperature superconductivity.

It is part of the more general group of rare-earth barium copper oxides (ReBCO) in which, instead of yttrium, other rare earths are present.

  1. ^ Knizhnik, A (2003). "Interrelation of preparation conditions, morphology, chemical reactivity and homogeneity of ceramic YBCO". Physica C: Superconductivity. 400 (1–2): 25. Bibcode:2003PhyC..400...25K. doi:10.1016/S0921-4534(03)01311-X.
  2. ^ Grekhov, I (1999). "Growth mode study of ultrathin HTSC YBCO films on YBaCuNbO buffer". Physica C: Superconductivity. 324 (1): 39. Bibcode:1999PhyC..324...39G. doi:10.1016/S0921-4534(99)00423-2.
  3. ^ Cite error: The named reference :0 was invoked but never defined (see the help page).