Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (8): 841-846.DOI: 10.3724/SP.J.1077.2013.12589

• Research Paper • Previous Articles     Next Articles

Theoretical Research on Optimization Dopant Regulation of La2BO4(B: B-site Element) Series Mixed Conductor Materials

REN Yu-Mei, CHEN Ning, ZHAO Hai-Lei, WANG Li-Jun, LI Fu-Sen   

  1. (School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)
  • Received:2012-09-18 Revised:2012-12-27 Published:2013-08-20 Online:2013-07-15
  • About author:REN Yu-Mei. E-mail: ren_yu_mei@163.com
  • Supported by:

    National Key Basic Research and Development Program of China(2012CB215405)

Abstract: Following the current MGI (Material Genome Interactive) movement and based on the first-principles Density Functional Theory(DFT) calculation method, the K2NiF4 type La2BO4 as well as some other related virtual phases were calculated with B-site elements changed from the 4th to 6th periods. The total energy of these related virtual phases was obtained by geometry optimization task. By comparing the binding energy of virtual phases between the layered La2BO4 and the cubic LaBO3, the influence of several important B-site elements (Fe, Co, Ni, Cu, Zn and Se) on structure stability of La2BO4 compounds was discussed. The results show that Cu is beneficial to the stability of La2BO4 phase, but not for Co, Ni and Fe elements in their synthesis process, and Fe was even trended to decompose to binary oxides. According to sufficient experimental data, the optimized stable area of B-doped elements was found. This results is helpful for studying the B-doped ingredient optimization of synthesis for solid oxide fuel cells materials.

Key words: first-principles, binding energy, optimized design of materials, MGI

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