Phonon spectroscopy of the nano- and microstructured ceramics

被引：3

作者：

Khazanov, E. N. ^{[1
]}

Taranov, A. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Kotelnikov Inst Radio Engn & Elect, Moscow 125009, Russia

来源：

JOURNAL OF COMMUNICATIONS TECHNOLOGY AND ELECTRONICS | 2013年 / 58卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

NONEQUILIBRIUM ACOUSTIC PHONONS; LOW-TEMPERATURES; HEAT PULSES; NANOCRYSTALLINE CERAMICS; MECHANICAL-PROPERTIES; PROPAGATION; TRANSPORT; FERROELECTRICS; SCATTERING; CRYSTALS;

D O I：

10.1134/S1064226913080044

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A relation of the diffusion coefficient of the subterahertz thermal phonons with the system of intergrain boundaries, grain size and structure, and the technological conditions for the synthesis of ceramics is established. It is demonstrated that the temperature dependence of the phonon diffusion coefficient at liquid-helium temperatures is determined by the spectral properties of the intergrain layer, which makes it possible to estimate the sample-averaged thickness and acoustic impedance. The conditions for and properties of the gap in the natural phonon spectrum of ceramics are studied. Specific features of the transport of sub-terahertz phonons in ceramic samples based on ferroelectric materials, solid solutions of electrolytes, and cermets are analyzed.

引用

页码：863 / 878

页数：16

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