Infrared Radiation Shielded SiZrOC Nanofiber Membranes: Preparation and High-temperature Thermal Insulation Performance

doi:10.15541/jim20210361

Abstract

Abstract:

Ceramic fibers are the vital high-temperature thermal insulating materials due to their excellent mechanical property, high-temperature stability and thermal shock resistance. However, practical application of traditional ceramic fiber membranes in the field of thermal insulation are greatly limited by their high thermal conductivities at high-temperatures. In this work, SiZrOC nanofiber membranes with high infrared shielding performance were prepared by electrospinning technique. The SiZrOC nanofibers were composed of SiO₂, ZrO₂, SiOC, and free carbon phase with average diameter of (511±108) nm. The SiZrOC nanofiber membranes exhibited possess excellent high-temperature thermal insulation performance. Thermal conductivity of SiZrOC nanofiber membranes at 1000 ℃ reached 0.127 W·m^-1·K^-1, obviously lower than that of other traditional ceramic fibers. In addition, the as-prepared SiZrOC nanofiber membranes exhibited high strength, good flexibility and excellent high-temperature stability, so they had great potential for high-temperature thermal insulation. Therefore, preparation strategy of SiZrOC nanofiber membranes also provides a new route for designing other high-performance thermal insulators.

Key words: ceramic fiber, high-temperature thermal insulation, electrospinning, infrared shielding

CLC Number:

TQ343

ZHANG Xiaoshan, WANG Bing, WU Nan, HAN Cheng, LIU Haiyan, WANG Yingde. Infrared Radiation Shielded SiZrOC Nanofiber Membranes: Preparation and High-temperature Thermal Insulation Performance[J]. Journal of Inorganic Materials, 2022, 37(1): 93-100.

Figures/Tables 8

Fig. 1 Schematic illustration of the fabrication procedure for SiZrOC nanofiber membranes

Fig. 2 FT-IR spectra of the PZSO precursor nanofibers

Fig. 3 (a) TG curve of the PZSO precursor fiber and (b) FT-IR spectra of pyrolysis gas product at various temperatures

Fig. 4 (a) Tensile strength-tensile strain of the SiZrOC nanofiber membranes (insets showing photographs of a piece of SiZrOC nanofiber membrane hanging a 10 g weight and bending with a glass bar); (b) SEM image of the SiZrOC nanofiber (inset showing distribution of fiber diameter); (c) EDS spectrum of SiZrOC nanofiber; (d) TEM image of the SiZrOC fiber (Inset showing the SAED pattern and HRTEM image taken from the region being marked in the red square box)

Fig. 5 XRD patterns of SiZrOC and SiZrO nanofibers

Fig. 6 (a) XPS survey spectra of the SiZrOC and SiZrO fibers, and peak fittings of the SiZrOC fibers of (b) C1s, (c) Si2p, (d) Zr3d

Fig. 7 (a) Photograph of SiZrOC nanofiber membrane heated by alcohol lamp, (b) thermal conductivities and (c) extinction coefficient (e) of SiZrOC and SiZrO nanofibers, and (d) thermal conductivity comparison among different ceramic fibers at 1000 ℃

Fig. 8 Weight retention versus temperature of the SiZrOC nanofiber

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