TY - JOUR
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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U2 - 10.1143/JJAP.19.L398
DO - 10.1143/JJAP.19.L398
M3 - Article
AN - SCOPUS:84921250337
SN - 0021-4922
VL - 19
SP - L398-L400
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 7
ER -