Interfacial Segregation in Perovskites and Applications to Boundary Layer Devices

Interfacial segregation is a term used to describe the compositional heterogeneity that exists between the bulk and interface in materials due to interfacial effects which are distinct from bulk effects. Segregation in solids is of great theoretical importance, and also plays an active role in modifying the properties of many materials. For example, surface segregation in single crystals may change the surface scattering of carriers, and electron emission characteristics. In polycrystalline materials, segregation of defects to grain boundaries may affect corrosion resistance, sintering kinetics, microstructure development and structure-property relations, including dielectric and electric properties. In addition to modifying the properties of materials, controlled segregation may also be made use of for fabricating new boundary layer devices such as, Positive Temperature Coefficient of Resistance (PTCR) Thermistors, internal Boundary Layer Capacitors (IBLC) and Voltage Dependent Resistors (VDR).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Ceramics Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Desu, Seshubabu

• Engineering, Materials Science

Identifier

(UMI)AAI8302849

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71700