Elastic Modulus Versus Bond Length in Lanthanum Chromite Ceramics

Authors: Charles S. Montross, Advanced Ceramic Development Center, University of Queensland (1998)

Abstract

The elastic moduli of both oxidized and reduced MgO, CaO and SrO doped lanthanum chromites were measured by the dynamic Young’s Modulus method. The elastic modulus was also measured as a function of the CaO content in both the oxidized and reduced states. From Reitveld fitting of the X-ray diffraction data, corresponding cation to anion atomic distances were calculated and compared. Changes in the elastic modulus correspond to changes in the Cr+3 to O-2 average interatomic distance for the dopants used.

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