Intrinsic kinetics of carbon dioxide degradation of YBa sub 2 Cu sub 3 O sub 7 minus x

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb07824.x· OSTI ID:5590045

Borowiec, K; Przyluski, J; Kolbrecka, K ^[1]

---

1. Inst. of Solid State Technology, Warsaw Univ. of Technology, ul. Noakowskiego 3, 00-664 Warsaw (PL)

This paper reports on the intrinsic kinetics, unaffected by diffusional and mass-transfer effects, of the CO{sub 2} degradation of superconducting particles that have been determined using a nonisothermal technique. Below 900{degrees} C, the carbonization of YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} leads to formation of BaCO{sub 3}, Y{sub 2}Cu{sub 2}O{sub 5}, CuO, and Cu{sub 2}O. A further increase in temperature results in formation of BaCuO{sub 2} from BaCO{sub 3} and CuO. The carbonization rate shows the 1.5th-order dependence on the amount of unreacted YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} for the temperature range of 550{degrees} to 815{degrees} C. The activation energy of carbonization was determined to be 95.1 kJ {center dot} mol{sup {minus}1}.

• OSTI ID: 5590045
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 74:8; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
664100 -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
ATOM TRANSPORT
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONIZATION
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
DECOMPOSITION
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
KINETICS
MASS TRANSFER
NEUTRAL-PARTICLE TRANSPORT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
REACTION KINETICS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES