Electronic Structure Calculations of Ba(Mg1/3Nb2/3)O3 and its Dielectric Properties Analysis

Abstract:

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The electronic structure of Ba(Mg1/3Nb2/3)O3 as a typical example of Ba(B¢1/3B¢¢2/3)O3 complex perovskites was investigated using the quantum chemical SCF- Xa-SW method. The calculations indicated that ionic bond strength plays the most important role in the structure stability of Ba(Mg1/3Nb2/3)O3 and BaTiO3. It was found that the bonding strength between oxygen and cations of B-site in Ba(Mg1/3Nb2/3)O3 is greater than that in BaTiO3, and the unbalance force in Ba(Mg1/3Nb2/3)O3 leads to the tendency of B-site ion arranging orderly. The more stable ordered structure of BMN phase can contribute to their better dielectric properties. The calculated results agree with the experimental observations, so it is helpful to designing and synthesizing the microwave dielectric ceramic with high Q-factor.

Info:

Periodical:

Key Engineering Materials (Volumes 280-283)

Edited by:

Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li

Pages:

39-42

DOI:

10.4028/www.scientific.net/KEM.280-283.39

Citation:

F. Lian et al., "Electronic Structure Calculations of Ba(Mg1/3Nb2/3)O3 and its Dielectric Properties Analysis", Key Engineering Materials, Vols. 280-283, pp. 39-42, 2005

Online since:

February 2007

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$35.00

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