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JOURNAL OF MATERIALS SCIENCE 36 (2001) 4745 4754 Densification of LaGaO3 at low sintering
 

Summary: JOURNAL OF MATERIALS SCIENCE 36 (2001) 4745 4754
Densification of LaGaO3 at low sintering
temperatures via Fe3+
substitution at Ga3+
site
A. CHANDRASEKARAN
Department of Physics, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
A.-M. AZAD
NexTech Materials, Ltd., 120-I Lakeview Plaza Blvd., Worthington, OH 43085
E-mail: azad@nextechmaterials.com
Attempts to achieve near theoretical density in polycrystalline LaGaO3 compacts using
Fe2O3 as a dopant have been made. The B-site substituted lanthanum gallates with iron
doping ranging from 15 to 55 mole% FeO1.5 (Fe2O3) were synthesized via solid state
reaction using oxide and nitrate precursors and sintered at 1200
C for 24 to 72 h and at
1300
C for 12 to 36 h. Systematic variation in the lattice constants and microstructural
aspects was followed as a function of mole fraction of Fe2O3. It was found that the parent
LaGaO3 structure could take up as high as 55 mole% of Fe2O3 retaining the orthorhombic
crystal structure. Compositions containing 35 mole% Fe2O3 soaked for 48 h or more at

  

Source: Azad, Abdul-Majeed - Department of Chemical and Environmental Engineering, University of Toledo

 

Collections: Materials Science; Energy Storage, Conversion and Utilization