Preparation and characterization of polycrystalline La2Zr2O7 ultrafine fibres via electrospinning.

摘要: Polyvinyl Pyrrolidone (PVP)/(Lanthanum nitrate and zirconium oxychloride) microfibres were fabricated by electrospinning. SEM micrographs indicated that the surface of prepared composite was smooth, diameter in range 2 microm-5 microm. X-ray diffractormetry (XRD) analysis revealed amorphous structure. La2Zr2O7 porous hollow ultrafine fibres (PHUF) calcination PVP/[La(NO3)3 + ZrOCl2] microfibres. The diameters PHUF smaller than those became coarse with increase temperatures. formed nanoparticles acquired when temperature above 800 degrees C. Scanning electron microscope (SEM) synthesized 500 nm-800 nm. XRD crystal structure La2Zr2O7PHUF found to be fluorite type C-900 C, pyrochlore at 1000 latter is cubic space group Fd3m. conductance high 5.19 S/cm2 has no effect frequency. Possible formation mechanism for preliminarily proposed.