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Study on the Electrical Conductivity of Cu/(NiFe_2O_4-10NiO) Cermets Doped with CaO

Gang Zhang

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Abstract

The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO were studied.The results showed that the electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO or not increased with temperature increasing,which is affected by the electrical conductivity of the ceramic matrix NiFe2O4-10NiO.At the same time,their electrical conductivities improved with the content of metal phase Cu increasing.The electrical conductivity of 2CaO-Cu/(NiFe2O4-10NiO) cermets at 960℃ increased from 18.24 S·cm-1 to 31.09 S·cm-1 when the content of metal Cu increased from 5% to 17%.Metal phase Cu reunited or insulated each other and exist as a big grain among the ceramic matrix when Cu/(NiFe2O4-10NiO) cermets doped with CaO.The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with 2% CaO at 900℃ decreased about 43.3%.

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What this paper is about

The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO were studied.The results showed that the electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO or not increased with temperature increasing,which is affected by the electrical conductivity of the ceramic matrix NiFe2O4-10NiO.At the same time,their electrical conductivities improved with the content of metal phase Cu increasing.The electrical conductivity of 2CaO-Cu/(NiFe2O4-10NiO) cermets at 960℃ increased from 18.24 S·cm-1 to 31.09 S·cm-1 when the content of metal Cu increased from 5% to 17%.Metal phase Cu reunited or insulated each other and exist as a big grain among the ceramic matrix when Cu/(NiFe2O4-10NiO) cermets doped with CaO.The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with 2% CaO at 900℃ decreased about 43.3%.

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Available abstract

The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO were studied.The results showed that the electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with CaO or not increased with temperature increasing,which is affected by the electrical conductivity of the ceramic matrix NiFe2O4-10NiO.At the same time,their electrical conductivities improved with the content of metal phase Cu increasing.The electrical conductivity of 2CaO-Cu/(NiFe2O4-10NiO) cermets at 960℃ increased from 18.24 S·cm-1 to 31.09 S·cm-1 when the content of metal Cu increased from 5% to 17%.Metal phase Cu reunited or insulated each other and exist as a big grain among the ceramic matrix when Cu/(NiFe2O4-10NiO) cermets doped with CaO.The electrical conductivity of Cu/(NiFe2O4-10NiO) cermets doped with 2% CaO at 900℃ decreased about 43.3%.

Key concepts: Cermet, Electrical resistivity and conductivity, Materials science, Doping, Ceramic, Metal, Conductivity, Phase (matter)

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