Preparation and characterization of Al₂O₃/SiO₂ composite nanofibers by using electrostatic spinning method

ABSTRACT

Al₂O₃-SiO₂ composite nanofibers were fabricated by calcining the precursor fibers obtained through sol–gel processing and electrospinning technique. Thermogravity-differential scanning calorimeter, powder X-ray diffraction, X-ray fluorescence analysis, scanning electron microscopy, transmission electron microscopy, and thermal conductivity instrument were employed to characterize the fibers. Upon calcining the precursor fibers at 1300°C, continuous Al₂O₃-SiO₂ composite nanofibers with diameter of about 300 nm can be obtained. The calcined fibers had low thermal conductivity, which might favor their application in high-temperature insulation areas.

Keywords:

• Alumina
• nanofiber
• electrostatic spinning

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 20971111).