Synthesis and characterization of perovskite-type BaMg 0.33Nb0.67-xFexO3-δ for potential high temperature CO2 sensors application

Ramaiyan Kannan; Suresh Mulmi; Venkataraman Thangadurai

doi:10.1039/c3ta10572e

Synthesis and characterization of perovskite-type BaMg _0.33Nb_0.67-xFe_xO_3-δ for potential high temperature CO₂ sensors application

Ramaiyan Kannan, Suresh Mulmi, Venkataraman Thangadurai^*

^*Corresponding author for this work

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Mixed ionic-electronic conducting BaMg_0.33Nb _0.67-xFe_xO_3-δ was successfully synthesized by conventional solid state method in air at elevated temperature. Fe-doping helped to increase the total conductivity, while the chemical stability under CO₂ at elevated temperatures and under H₂O vapour at boiling conditions decreased with increasing Fe content above x = 0.17 in BaMg_0.33Nb_0.67-xFe_xO _3-δ. Maximum total conductivity of 10^-3 S cm ^-1 at 300°C was obtained for BMNF33 in air, and further increase in Fe content lowered the electrical conductivity, particularly at low temperatures. Activation energy, in the range of 300-700°C, for total electrical conduction was found to decrease in air by the incorporation of Fe in BaMg_0.33Nb_0.67O₃ (BMN) (BMN: 0.96 eV; BMNF17: 0.72 eV; BMNF33: 0.25 eV). Furthermore, the x = 0.17 composition demonstrated excellent CO₂ sensing characteristics at 700°C. The investigated perovskite-type metal oxides seem to be promising candidates for monitoring CO₂ (ppm level in air) at elevated temperatures.

Original language	English
Pages (from-to)	6874-6879
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	1
Issue number	23
DOIs	https://doi.org/10.1039/c3ta10572e
Publication status	Published - 21 Jun 2013

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@article{4e023a8d7c9c46fdb1b4d82b519bf8d8,

title = "Synthesis and characterization of perovskite-type BaMg 0.33Nb0.67-xFexO3-δ for potential high temperature CO2 sensors application",

abstract = "Mixed ionic-electronic conducting BaMg0.33Nb 0.67-xFexO3-δ was successfully synthesized by conventional solid state method in air at elevated temperature. Fe-doping helped to increase the total conductivity, while the chemical stability under CO2 at elevated temperatures and under H2O vapour at boiling conditions decreased with increasing Fe content above x = 0.17 in BaMg0.33Nb0.67-xFexO 3-δ. Maximum total conductivity of 10-3 S cm -1 at 300°C was obtained for BMNF33 in air, and further increase in Fe content lowered the electrical conductivity, particularly at low temperatures. Activation energy, in the range of 300-700°C, for total electrical conduction was found to decrease in air by the incorporation of Fe in BaMg0.33Nb0.67O3 (BMN) (BMN: 0.96 eV; BMNF17: 0.72 eV; BMNF33: 0.25 eV). Furthermore, the x = 0.17 composition demonstrated excellent CO2 sensing characteristics at 700°C. The investigated perovskite-type metal oxides seem to be promising candidates for monitoring CO2 (ppm level in air) at elevated temperatures.",

author = "Ramaiyan Kannan and Suresh Mulmi and Venkataraman Thangadurai",

year = "2013",

month = jun,

day = "21",

doi = "10.1039/c3ta10572e",

language = "English",

volume = "1",

pages = "6874--6879",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

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TY - JOUR

T1 - Synthesis and characterization of perovskite-type BaMg 0.33Nb0.67-xFexO3-δ for potential high temperature CO2 sensors application

AU - Kannan, Ramaiyan

AU - Mulmi, Suresh

AU - Thangadurai, Venkataraman

PY - 2013/6/21

Y1 - 2013/6/21

N2 - Mixed ionic-electronic conducting BaMg0.33Nb 0.67-xFexO3-δ was successfully synthesized by conventional solid state method in air at elevated temperature. Fe-doping helped to increase the total conductivity, while the chemical stability under CO2 at elevated temperatures and under H2O vapour at boiling conditions decreased with increasing Fe content above x = 0.17 in BaMg0.33Nb0.67-xFexO 3-δ. Maximum total conductivity of 10-3 S cm -1 at 300°C was obtained for BMNF33 in air, and further increase in Fe content lowered the electrical conductivity, particularly at low temperatures. Activation energy, in the range of 300-700°C, for total electrical conduction was found to decrease in air by the incorporation of Fe in BaMg0.33Nb0.67O3 (BMN) (BMN: 0.96 eV; BMNF17: 0.72 eV; BMNF33: 0.25 eV). Furthermore, the x = 0.17 composition demonstrated excellent CO2 sensing characteristics at 700°C. The investigated perovskite-type metal oxides seem to be promising candidates for monitoring CO2 (ppm level in air) at elevated temperatures.

AB - Mixed ionic-electronic conducting BaMg0.33Nb 0.67-xFexO3-δ was successfully synthesized by conventional solid state method in air at elevated temperature. Fe-doping helped to increase the total conductivity, while the chemical stability under CO2 at elevated temperatures and under H2O vapour at boiling conditions decreased with increasing Fe content above x = 0.17 in BaMg0.33Nb0.67-xFexO 3-δ. Maximum total conductivity of 10-3 S cm -1 at 300°C was obtained for BMNF33 in air, and further increase in Fe content lowered the electrical conductivity, particularly at low temperatures. Activation energy, in the range of 300-700°C, for total electrical conduction was found to decrease in air by the incorporation of Fe in BaMg0.33Nb0.67O3 (BMN) (BMN: 0.96 eV; BMNF17: 0.72 eV; BMNF33: 0.25 eV). Furthermore, the x = 0.17 composition demonstrated excellent CO2 sensing characteristics at 700°C. The investigated perovskite-type metal oxides seem to be promising candidates for monitoring CO2 (ppm level in air) at elevated temperatures.

U2 - 10.1039/c3ta10572e

DO - 10.1039/c3ta10572e

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SN - 2050-7488

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JF - Journal of Materials Chemistry A

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