Details

Autor(en) / Beteiligte

• Kosuga, Atsuko
• Tsuchiya, Kazuyo
• Matsuzawa, Mie

Titel

Microstructure and thermoelectric properties of Ca0.9Yb0.1MnO3/Pd nanocomposite prepared by electroless plating

Ist Teil von

• Journal of alloys and compounds, 2013-08, Vol.568, p.118-123

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• • We fabricated a Ca0.9Yb0.1MnO3/Pd nanocomposite by electroless plating. • P-containing Pd is present at the grain boundaries in the Ca0.9Yb0.1MnO3 matrix. • The thermoelectric properties degraded with increasing Pd content. • This is probably because the Pd-P phase increased electrical resistivity. We have fabricated a Ca0.9Yb0.1MnO3/Pd nanocomposite in which a palladium layer made up of particles with a size of about 50nm exists at grain boundaries in the Ca0.9Yb0.1MnO3 matrix. The nanocomposite was produced by plating Ca0.9Yb0.1MnO3 powder with palladium and then carrying out spark plasma sintering. The palladium particles contained 10wt.% phosphorus, independent of the palladium content, and had an amorphous structure. The as-plated phosphorous-containing palladium particles transformed into crystalline palladium and amorphous palladium phosphide after sintering at 1023K. The thermoelectric properties of the Ca0.9Yb0.1MnO3/Pd nanocomposite bulk degraded with increasing palladium content, mainly as a result of the high electrical resistivity. This is probably because the palladium-phosphorus phase located at the grain boundaries inhibits electrical conductance, which leads to lower electrical mobility.