Fabrication and nano structural study on La۲O۳-Co۳O۴-ZrO۲ composite

We report on the synthesis, morphology, chemically and structurally of La۲O۳-Co۳O۴-ZrO۲ nanostructure. The La۲O۳-Co۳O۴-ZrO۲ nanostructure was synthesized by a method based on the co-precipitation. Composite powders have been characterized by XRD (X-ray diffraction), SEM (scanning electron microscopy) and BET (Brunauer-Emmett-Teller). X-ray diffraction showed the formation of nano crystalline, La۲Zr۲O۷, ZrO۲, La(OH)۳ and Co۳O۴ phases. Scanning electron microscopy revealed that nanostructure formed by increasing the calcinations temperatures. With BET and BJH (Barrett, Joyner and Halenda) method the pore size distribution was determined. The effects of chemical compositions and calcinations temperature on the surface topography and the crystallization of phases were studied. The lattice strain of nanocrystallite during thermal treatment was calculated.

Keywords:

Fabrication , nanostructure , La۲O۳-Co۳O۴-ZrO۲ , Composite , co-precipitation