TY - CONF

T1 - Conductivity study of dense BaCex Zr(0.9-x)Y0.1O(3 − δ) prepared by solid state reactive sintering at 1500 deg. C

A1 - Ricote,Sandrine

A1 - Bonanos,Nikolaos

A1 - Manerbino,A.

A1 - Coors,W.G.

AU - Ricote,Sandrine

AU - Bonanos,Nikolaos

AU - Manerbino,A.

AU - Coors,W.G.

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - A cost and time effective process was used to prepare the solid solutions BaCexZr(0.9−x)Y0.1O(3−δ) (0 ≤ x ≤ 0.4). 98% dense samples were obtained by solid state reactive sintering at 1500 °C for 4 h, with the addition of 1 wt% of NiO to the quantity of synthesized/sintered compound. Scanning electron micrographs reveal polygonal grains of 1–5 microns, whose size increases from the compound with no cerium (BCZY09) to the samples containing cerium (BCZY18–BCZY45). The conductivity, measured in wet reducing atmosphere (9% H2 in N2, p(H2O) = 0.015 atm) by impedance spectroscopy, increases with the cerium content. Some samples have also been prepared using barium sulfate (BaSO4) as barium precursor (instead of barium carbonate BaCO3) due to its non toxicity. The corresponding samples (prepared at 1575 °C) showed similar properties as the ones prepared with barium carbonate. Furthermore, different geometries (rods, tubes, pellets) could be made.

AB - A cost and time effective process was used to prepare the solid solutions BaCexZr(0.9−x)Y0.1O(3−δ) (0 ≤ x ≤ 0.4). 98% dense samples were obtained by solid state reactive sintering at 1500 °C for 4 h, with the addition of 1 wt% of NiO to the quantity of synthesized/sintered compound. Scanning electron micrographs reveal polygonal grains of 1–5 microns, whose size increases from the compound with no cerium (BCZY09) to the samples containing cerium (BCZY18–BCZY45). The conductivity, measured in wet reducing atmosphere (9% H2 in N2, p(H2O) = 0.015 atm) by impedance spectroscopy, increases with the cerium content. Some samples have also been prepared using barium sulfate (BaSO4) as barium precursor (instead of barium carbonate BaCO3) due to its non toxicity. The corresponding samples (prepared at 1575 °C) showed similar properties as the ones prepared with barium carbonate. Furthermore, different geometries (rods, tubes, pellets) could be made.

KW - Membranes

KW - Membraner

U2 - 10.1016/j.ijhydene.2011.08.118

DO - 10.1016/j.ijhydene.2011.08.118

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 9

VL - 37

SP - 7954

EP - 7961

ER -