Chemical diffusion of oxygen in yttrium barium(2) copper(3) oxygen(6+x)

This thesis is primarily concerned with a quantitative investigation of the chemical diffusion of oxygen in YBa$\sb2$Cu$\sb3$O$\sb{\rm 6+x}$. The research also investigates the optimization of crystal growth and the interrelationship between oxygen mobility and ferroelastic characteristics. Oxygen jump mechanisms in YBCO were also proposed and evaluated using an oxygen interaction model. Crystal growth mechanisms in YBCO are highly anisotropic, with extremely slow growth in the c-axis direction. However, the understanding and optimization of these mechanisms have led to the successful growth of large, high quality crystals often in the range of $\sim10\times10\times2{\rm mm}\sp3$. These single crystal specimens in conjunction with polycrystalline specimens with varying microstructures were investigated to distinguish between intrinsic diffusion and microstructure-dependent behavior.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Science

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• LaGraff, John Robert

Contributors dc:contributor

• Payne, David A.

• Chemistry, Inorganic
• Physics, Condensed Matter
• Engineering, Materials Science

Statement dc:rights

• Copyright 1992 LaGraff, John Robert

Language dc:language

eng

Identifier

AAI9305593
(UMI)AAI9305593

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20901