A new perovskite series based on lanthanum chromite [LaCr[sub 1[minus]x]M[sub x]O[sub 3[minus][delta]]]
- Indian Inst. of Science, Bangalore (India). Dept. of Inorganic and Physical Chemistry
A new series of substituted perovskites of the type LaCr[sub 1[minus]x]M[sub x]O[sub 3[minus][delta]], where M=Cu or Mg have been synthesized by the citrate gel process and characterized by means of powder X-ray diffraction, infrared spectroscopy, selected area diffraction and also by electron paramagnetic resonance spectroscopy. The general powder morphology was also observed using scanning electron microscopy. 40 mole percent substitution of Cr[sup 3+] by Cu[sup 2+] or Mg[sup 2+] have shown to result in single phase perovskite structure. Beyond x=0.5, a new phase has been identified in a narrow compositional range. Effect of Cu and Mg substitution on the sinterability of pure LaCrO[sub 3] has also been studied. It is possible to get near theoretically dense materials at a temperature as low as 1,200 C in air by copper substitution.
- OSTI ID:
- 5938870
- Journal Information:
- Materials Research Bulletin; (United States), Vol. 28:10; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
CHROMIUM OXIDES
FABRICATION
MICROSTRUCTURE
COPPER OXIDES
LANTHANUM OXIDES
MAGNESIUM OXIDES
COPPER ADDITIONS
FUEL CELLS
PEROVSKITES
PHASE STUDIES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CHROMIUM COMPOUNDS
COPPER ALLOYS
COPPER COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
LANTHANUM COMPOUNDS
MAGNESIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
300503 - Fuel Cells- Materials
Components
& Auxiliaries