TY - JOUR

T1 - Conductivity at Low Humidity of Materials Derived from Ferroxane Particles

A1 - Lapina,Alberto

A1 - Holtappels,Peter

A1 - Mogensen,Mogens Bjerg

AU - Lapina,Alberto

AU - Holtappels,Peter

AU - Mogensen,Mogens Bjerg

PB - Sage - Hindawi Access to Research

PY - 2012

Y1 - 2012

N2 - <p>Carboxylic-acid-stabilised γ-FeOOH particles (ferroxanes) are synthesized using a precipitation from aqueous solution, and a following reaction with acetic acid. The materials produced with these powders are investigated by XRD, SEM, nitrogen adsorption-desorption, and impedance spectroscopy. Conductivity of both sintered and unsintered materials decreases strongly with a decrease in water partial pressure in the atmosphere during the test. The highest conductivity (7·10−3 S cm−1) is measured in air (p_H2O = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions.<br/> <br/> <br/> </p> <p><br/> <br/>  = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions.</p>

AB - <p>Carboxylic-acid-stabilised γ-FeOOH particles (ferroxanes) are synthesized using a precipitation from aqueous solution, and a following reaction with acetic acid. The materials produced with these powders are investigated by XRD, SEM, nitrogen adsorption-desorption, and impedance spectroscopy. Conductivity of both sintered and unsintered materials decreases strongly with a decrease in water partial pressure in the atmosphere during the test. The highest conductivity (7·10−3 S cm−1) is measured in air (p_H2O = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions.<br/> <br/> <br/> </p> <p><br/> <br/>  = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions.</p>

U2 - 10.1155/2012/930537

DO - 10.1155/2012/930537

JO - International Journal of Electrochemistry

JF - International Journal of Electrochemistry

SN - 2090-3537

VL - 2012

SP - 930537

ER -