Author/Authors :
Nikkanen، نويسنده , , Juha-Pekka and Harju، نويسنده , , Mika and Jنrn، نويسنده , , Mikael and Linden، نويسنده , , Johan and Rintala، نويسنده , , Jyri and Messing، نويسنده , , Maria E. and Huttunen-Saarivirta، نويسنده , , Elina and Saarinen، نويسنده , , Tuomo and Kanerva، نويسنده , , Tomi and Honkanen، نويسنده , , Mari and Aromaa، نويسنده , , Mikko and Levنnen، نويسنده , , Erkki and Pettersson، نويسنده , , Mika and Mنkelن، نويسنده , , Jyrki M. and Deppert، نويسنده , , Knut and Mنntylن، نويسنده , , Tapio، نويسنده ,
Abstract :
Carbon nanotubes (CNTs) were synthesized on liquid flame sprayed (LFS) powder substrate of iron oxide doped Al2O3–ZrO2. Iron oxide doped Al2O3–ZrO2 nanopowder was produced by injecting the liquid precursor of aluminium-isopropoxide, zirconium-n-propoxide, ferrocene and p-xylene into a high temperature (~ 3000 K) flame. The precursor solution was atomized by high-velocity H2 flow and injected into the flame where nanoparticles were formed. The collected sample was used as a substrate material for the synthesis of CNTs. The CNTs were formed on the surfaces of the substrate powder by catalyzed decomposition of CH4. The particle morphology, size, phase composition and the nature of CNTs were determined by TEM, FE-SEM, XRD, XPS, Mössbauer and Raman spectroscopy. The collected powder consists of micron-sized agglomerates with nanosized primary particles. Tetragonal zirconia was detected while alumina was amorphous. In the carbonized sample multiwalled CNTs were obtained.
Keywords :
ceramics , oxides , Carbon nanotubes , Nanopowder
