Published March 2004 | Version v1
Journal article Metadata-only

Connection of oxygen atom dynamics and oxidation kinetics of solid solutions based on Bi2Sr2CaCu2O8

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)
  • 2. GNTs RF Fiziko-Ehnergeticheskij Inst., Obninsk, Kaluzhskaya Obl. (Russian Federation)

Description

The kinetics of the Bi1.3Pb0.8Sr2Ca0.8Y0.2Cu2O8+δ solid solutions oxidation at different temperatures and pO2 = 0.21 atm is studied through the thermography method and compared with the earlier studied case for the Bi1.5Pb0.6Sr2CaCu2O8+δ solid solutions. It is established that replacement of Ca by Y significantly delays the initial stage of the process, connected with the oxygen diffusion. The phonon spectra of the above-mentioned solid solutions are studied through the method of the neutrons inelastic scattering. The possible model of the interrelationship of the observed differences in the high-frequency parts of the phonon state density spectra (> 50 meV) in the yttrium-containing and nonyttrium solid solutions with differences in the oxidation kinetics is proposed

Abstract (Russian)

Кинетика окисления твердых растворов Bi1.3Pb0.8Sr2Ca0.8Y0.2Cu2O8+δ при различных температурах и pO2 = 21 атм исследована методом термогравиметрии и сопоставлена с ранее исследованным случаем твердых растворов Bi1.5Pb0.6Sr2CaCu2O8+δ. Обнаружено, что замещение Ca на Y значительно замедляет начальную стадию процесса, связанную с кислородной диффузией. Методом неупругого рассеяния нейтронов исследованы фононные спектры указанных твердых растворов. Предложена возможная модель взаимосвязи наблюдаемых различий в высокочастотных частях спектров плотности фононного состояния (> 50 мэВ) в иттрийсодержащих и безиттриевых твердых растворах с различиями в их кинетике окисления

Additional details

Additional titles

Original title (Russian)
Связ' динамики атомов кислорода и кинетики окисления твердых растворов на основе Би

Publishing Information

Journal Title
Fizika Tverdogo Tela
Journal Volume
46
Journal Issue
3
Journal Page Range
p. 414-418
ISSN
0367-3294
CODEN
FTVTAC

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
37064492
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHEMICAL REACTION KINETICS; CUPRATES; DIFFUSION; HIGH-TC SUPERCONDUCTORS; LATTICE VIBRATIONS; MICROSTRUCTURE; OXIDATION; OXYGEN; PHONONS; SOLID SOLUTIONS; SPECTRA; STRONTIUM COMPOUNDS; TEMPERATURE RANGE 0400-1000 K; THERMOGRAPHY; VIBRATIONAL STATES; YTTRIUM ADDITIONS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHEMICAL REACTIONS; COPPER COMPOUNDS; DISPERSIONS; ELEMENTS; ENERGY LEVELS; EXCITED STATES; HOMOGENEOUS MIXTURES; KINETICS; MEASURING METHODS; MIXTURES; NONMETALS; OXYGEN COMPOUNDS; QUASI PARTICLES; REACTION KINETICS; SOLUTIONS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
19 refs., 5 figs., 1 tab.