Effect of sintering temperature on surface morphology and electrical properties of samarium-doped ceria carbonate for solid oxide fuel cells

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Abstract

The effects of sintering temperature on the surface morphology, roughness, and electrical properties of samarium-doped ceria (SDC)-carbonate (SDCC) composite electrolyte were examined. SDCC composite pellets were fabricated and sintered at various temperatures ranging from 500 °C to 650 °C. Brunauer-Emmett-Teller technique and atomic force microscopy were used to investigate the surface area and surface roughness of the composite materials, respectively. Conductivity measurements using impedance spectroscopy were conducted from 350 °C to 550 °C. The specific surface area of the pure SDC powder decreased from 8.85 m2/g to 4.24 m2/g after the carbonate phase was incorporated into the SDC phase with increasing particle size. The composite pellet sintering temperature affected the continuity between the two phases [SDC and (Li/Na) carbonate], roughness, mean particle size, and conductivity of the composite electrolyte. A fully dense SDCC composite electrolyte pellet sintered at 550 °C exhibited a maximum ionic conductivity of 0.077 S/cm at 550 °C. In addition, 550 °C was the minimum sintering temperature to achieve good wetting between the two phases, moderate particle size, low surface roughness, and high ionic conductivity.

Original languageEnglish
Pages (from-to)1323-1332
Number of pages10
JournalCeramics International
Volume41
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

Samarium
Carbonates
Cerium compounds
Solid oxide fuel cells (SOFC)
Surface morphology
Electric properties
Sintering
Composite materials
Surface roughness
Electrolytes
Particle size
Ionic conductivity
Temperature
Specific surface area
Powders
Wetting
Atomic force microscopy
Spectroscopy

Keywords

  • A. Sintering
  • B. Composites
  • C. Ionic conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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abstract = "The effects of sintering temperature on the surface morphology, roughness, and electrical properties of samarium-doped ceria (SDC)-carbonate (SDCC) composite electrolyte were examined. SDCC composite pellets were fabricated and sintered at various temperatures ranging from 500 °C to 650 °C. Brunauer-Emmett-Teller technique and atomic force microscopy were used to investigate the surface area and surface roughness of the composite materials, respectively. Conductivity measurements using impedance spectroscopy were conducted from 350 °C to 550 °C. The specific surface area of the pure SDC powder decreased from 8.85 m2/g to 4.24 m2/g after the carbonate phase was incorporated into the SDC phase with increasing particle size. The composite pellet sintering temperature affected the continuity between the two phases [SDC and (Li/Na) carbonate], roughness, mean particle size, and conductivity of the composite electrolyte. A fully dense SDCC composite electrolyte pellet sintered at 550 °C exhibited a maximum ionic conductivity of 0.077 S/cm at 550 °C. In addition, 550 °C was the minimum sintering temperature to achieve good wetting between the two phases, moderate particle size, low surface roughness, and high ionic conductivity.",
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T1 - Effect of sintering temperature on surface morphology and electrical properties of samarium-doped ceria carbonate for solid oxide fuel cells

AU - Ali, S. A Muhammed

AU - Rosli, Ros Emilia

AU - Muchtar, Andanastuti

AU - Sulong, Abu Bakar

AU - Somalu, Mahendra Rao

AU - Herianto, Edy

PY - 2015

Y1 - 2015

N2 - The effects of sintering temperature on the surface morphology, roughness, and electrical properties of samarium-doped ceria (SDC)-carbonate (SDCC) composite electrolyte were examined. SDCC composite pellets were fabricated and sintered at various temperatures ranging from 500 °C to 650 °C. Brunauer-Emmett-Teller technique and atomic force microscopy were used to investigate the surface area and surface roughness of the composite materials, respectively. Conductivity measurements using impedance spectroscopy were conducted from 350 °C to 550 °C. The specific surface area of the pure SDC powder decreased from 8.85 m2/g to 4.24 m2/g after the carbonate phase was incorporated into the SDC phase with increasing particle size. The composite pellet sintering temperature affected the continuity between the two phases [SDC and (Li/Na) carbonate], roughness, mean particle size, and conductivity of the composite electrolyte. A fully dense SDCC composite electrolyte pellet sintered at 550 °C exhibited a maximum ionic conductivity of 0.077 S/cm at 550 °C. In addition, 550 °C was the minimum sintering temperature to achieve good wetting between the two phases, moderate particle size, low surface roughness, and high ionic conductivity.

AB - The effects of sintering temperature on the surface morphology, roughness, and electrical properties of samarium-doped ceria (SDC)-carbonate (SDCC) composite electrolyte were examined. SDCC composite pellets were fabricated and sintered at various temperatures ranging from 500 °C to 650 °C. Brunauer-Emmett-Teller technique and atomic force microscopy were used to investigate the surface area and surface roughness of the composite materials, respectively. Conductivity measurements using impedance spectroscopy were conducted from 350 °C to 550 °C. The specific surface area of the pure SDC powder decreased from 8.85 m2/g to 4.24 m2/g after the carbonate phase was incorporated into the SDC phase with increasing particle size. The composite pellet sintering temperature affected the continuity between the two phases [SDC and (Li/Na) carbonate], roughness, mean particle size, and conductivity of the composite electrolyte. A fully dense SDCC composite electrolyte pellet sintered at 550 °C exhibited a maximum ionic conductivity of 0.077 S/cm at 550 °C. In addition, 550 °C was the minimum sintering temperature to achieve good wetting between the two phases, moderate particle size, low surface roughness, and high ionic conductivity.

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