Effects of Potassium Ion Substitution on Lattice Parameters and Proton Migration in Barium Phosphate

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概要

• 論文の詳細を見る

• The effects of substituting a potassium ion for a barium ion in barium phosphate on lattice parameters and proton migration were investigated using density functional theory. A proton inserted into the material preferred to be attached to an oxygen ion near the potassium ion to compensate for the positive charge of the potassium ion that is less than that of the barium ion. Lattice parameters were investigated as a function of the potassium ion concentration. The lattice parameter a increased linearly with the potassium ion concentration, while the lattice parameter c remained almost constant. These trends were in good agreement with the experimental results. When the proton migrated from the ab-plane containing the potassium ion to the plane free of the potassium ion, a high energy barrier of 0.58 eV was required for proton migration. This value was also in good agreement with the experimentally measured energy barriers (0.53--0.58 eV).

• The Japan Society of Applied Physicsの論文
• 2013-11-25

著者

• Kim Yeong-Cheol

  School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan, Chungnam 330-708, Korea

• Kim Byung-Kook

  Korea Institute of Science and Technology, High Temperature Energy Materials Research Center, Seoul 136-791, Korea

• Jeong Yong-Chan

  School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan, Chungnam 330-708, Korea

関連論文

• Interaction Effect of Protons on Their Migration in Bulk Undoped Barium Zirconate Using Density Functional Theory
• Effects of Potassium Ion Substitution on Lattice Parameters and Proton Migration in Barium Phosphate
• Effects of Potassium Ion Substitution on Lattice Parameters and Proton Migration in Barium Phosphate

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