TY - JOUR
T1 - Lattice dynamics and phonon characteristics of complex perovskite microwave ceramics
AU - Shi, Feng
AU - Dong, He Lei
AU - Zhou, Di
AU - Wang, Chun Hai
AU - Tan, Qiu Lin
AU - Xiong, Ji Jun
AU - Wang, Qing
N1 - Publisher Copyright:
© 2019 Institution of Engineering and Technology. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Complex perovskite microwave dielectric ceramics (MWDCs) of A(B′1/3B″2/3)O3-type (A = Ba, Sr,...; B′ = Mg, Zn,...; B″ = Nb, Ta), which exhibit excellent dielectric properties, have currently been widely used in microwave and millimetre wave devices. Vibrational spectra, including both Raman and far-infrared (FIR) spectra, are powerful tools to investigate the atomic thermal vibrational properties of MWDCs and reveal the intrinsic origin of dielectric properties. In this review, lattice dynamics and phonon characteristics of the A(B′1/3B″2/3)O3-type MWDCs are summarised and presented in detail to introduce remarkable progress in this field and make a guide for the design of novel advanced MWDCs. The atomic sites and the corresponding modes in Raman and FIR spectra are identified and illuminated. The effects of the processing conditions and the ordered superstructures in the nanoscale region on vibrational modes are summarised systemically. Intrinsic properties can be extrapolated from the fitting results of FIR spectroscopy, which were also discussed based on the Kramers-Krönig relations, Lorentz three-parameter classical model and four-parameter semi-quantum model. The correlations between vibrational modes (phonons), crystal structures, and dielectric properties are created, which can help to build the mathematical models so as to understand the structure-property relationship of MWDCs better.
AB - Complex perovskite microwave dielectric ceramics (MWDCs) of A(B′1/3B″2/3)O3-type (A = Ba, Sr,...; B′ = Mg, Zn,...; B″ = Nb, Ta), which exhibit excellent dielectric properties, have currently been widely used in microwave and millimetre wave devices. Vibrational spectra, including both Raman and far-infrared (FIR) spectra, are powerful tools to investigate the atomic thermal vibrational properties of MWDCs and reveal the intrinsic origin of dielectric properties. In this review, lattice dynamics and phonon characteristics of the A(B′1/3B″2/3)O3-type MWDCs are summarised and presented in detail to introduce remarkable progress in this field and make a guide for the design of novel advanced MWDCs. The atomic sites and the corresponding modes in Raman and FIR spectra are identified and illuminated. The effects of the processing conditions and the ordered superstructures in the nanoscale region on vibrational modes are summarised systemically. Intrinsic properties can be extrapolated from the fitting results of FIR spectroscopy, which were also discussed based on the Kramers-Krönig relations, Lorentz three-parameter classical model and four-parameter semi-quantum model. The correlations between vibrational modes (phonons), crystal structures, and dielectric properties are created, which can help to build the mathematical models so as to understand the structure-property relationship of MWDCs better.
UR - https://www.scopus.com/pages/publications/85069612599
U2 - 10.1049/iet-nde.2018.0016
DO - 10.1049/iet-nde.2018.0016
M3 - 文献综述
AN - SCOPUS:85069612599
SN - 2514-3255
VL - 2
SP - 11
EP - 26
JO - IET Nanodielectrics
JF - IET Nanodielectrics
IS - 1
ER -