Structure of crystalline oxide ceramics studied by phonon spectroscopy

Journal Article · Sun Mar 31 04:00:00 EDT 2013 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2013V043N03ABEH015136· OSTI ID:22113733

Kaminskii, Alexandr A; Taranov, A V; Khazanov, E N

This paper describes a method for gaining detailed insight into the structure and phonon spectrum of polycrystalline oxide ceramics. We examine how the diffusion coefficient of subterahertz phonons is related to the properties of a system of grain boundaries and to the grain size and structure and demonstrate that the temperature dependence of the phonon diffusion coefficient at liquid-helium temperatures is determined by the spectral properties of the intergranular layer, which allows one to estimate the volumeaveraged intergranular layer thickness and acoustic impedance. We also analyse the effect of plastic deformation via twinning on the formation of the structure of grains and intergranular layers, which determine the thermophysical, acoustic and optical properties of ceramic materials. (extreme light fields and their applications)

• OSTI ID: 22113733
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 3 Vol. 43; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERAMICS
CRYOGENIC FLUIDS
CRYSTAL STRUCTURE
DIFFUSION
GRAIN BOUNDARIES
GRAIN SIZE
HELIUM
LAYERS
OPTICAL PROPERTIES
OXIDES
PHONONS
PLASTICITY
POLYCRYSTALS
SPECTRA
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TWINNING