Elastic constants and thermal expansion of cation disordered perovskites

Kenji Uchino; Shoichiro Nomura; Ahmed Amin; Zung P. Chang; Leslie E. Cross; Robert E. Newnham

doi:10.1143/JJAP.19.L398

Elastic constants and thermal expansion of cation disordered perovskites

Kenji Uchino, Shoichiro Nomura, Ahmed Amin, Zung P. Chang, Leslie E. Cross, Robert E. Newnham

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The elastic constants of the cation disordered perovskites Pb(Mg_1/3Nb_2/3)O₃, Pb(Zn_1/3Nb_2/3)O₃ and (K_3/4Bi_1/4)(Zn_1/6Nb_5/6)O₃ have been measured by the ultrasonic pulse superposition method, and the thermal expansion of (K_3/4Bi_1/4)(Zn_1/6Nb_5/6)O₃ has been determined from 300 K to 800 K by X-ray powder diffraction. Both the elastic stiffness and the thermal expansion coefficients of cation disordered perovskites are somewhat smaller than those of simple perovskites. Consistent with previously reported electrostrictive and dielectric properties, the results can be explained by an intuitive ion “rattling” space model.

Original language	English (US)
Pages (from-to)	L398-L400
Journal	Japanese Journal of Applied Physics
Volume	19
Issue number	7
DOIs	https://doi.org/10.1143/JJAP.19.L398
State	Published - Jul 1980

All Science Journal Classification (ASJC) codes

General Engineering
General Physics and Astronomy

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title = "Elastic constants and thermal expansion of cation disordered perovskites",

abstract = "The elastic constants of the cation disordered perovskites Pb(Mg1/3Nb2/3)O3, Pb(Zn1/3Nb2/3)O3 and (K3/4Bi1/4)(Zn1/6Nb5/6)O3 have been measured by the ultrasonic pulse superposition method, and the thermal expansion of (K3/4Bi1/4)(Zn1/6Nb5/6)O3 has been determined from 300 K to 800 K by X-ray powder diffraction. Both the elastic stiffness and the thermal expansion coefficients of cation disordered perovskites are somewhat smaller than those of simple perovskites. Consistent with previously reported electrostrictive and dielectric properties, the results can be explained by an intuitive ion “rattling” space model.",

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T1 - Elastic constants and thermal expansion of cation disordered perovskites

AU - Uchino, Kenji

AU - Nomura, Shoichiro

AU - Amin, Ahmed

AU - Chang, Zung P.

AU - Cross, Leslie E.

AU - Newnham, Robert E.

PY - 1980/7

Y1 - 1980/7

N2 - The elastic constants of the cation disordered perovskites Pb(Mg1/3Nb2/3)O3, Pb(Zn1/3Nb2/3)O3 and (K3/4Bi1/4)(Zn1/6Nb5/6)O3 have been measured by the ultrasonic pulse superposition method, and the thermal expansion of (K3/4Bi1/4)(Zn1/6Nb5/6)O3 has been determined from 300 K to 800 K by X-ray powder diffraction. Both the elastic stiffness and the thermal expansion coefficients of cation disordered perovskites are somewhat smaller than those of simple perovskites. Consistent with previously reported electrostrictive and dielectric properties, the results can be explained by an intuitive ion “rattling” space model.

AB - The elastic constants of the cation disordered perovskites Pb(Mg1/3Nb2/3)O3, Pb(Zn1/3Nb2/3)O3 and (K3/4Bi1/4)(Zn1/6Nb5/6)O3 have been measured by the ultrasonic pulse superposition method, and the thermal expansion of (K3/4Bi1/4)(Zn1/6Nb5/6)O3 has been determined from 300 K to 800 K by X-ray powder diffraction. Both the elastic stiffness and the thermal expansion coefficients of cation disordered perovskites are somewhat smaller than those of simple perovskites. Consistent with previously reported electrostrictive and dielectric properties, the results can be explained by an intuitive ion “rattling” space model.

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Elastic constants and thermal expansion of cation disordered perovskites

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