Journal of Inorganic Materials, Volume. 38, Issue 11, 1257(2023)
Figures & Tables(11)
1. (a) 27Al NMR spectra of aluminum sol prepared with different n (Al(OH)3)∶n (AlCl3) and (b) particle size distributions of hybrid sol with n (Al(OH)3)∶n (AlCl3) at 1:0.35
S1. SEM images of alumina ceramic continuous fiber after heat-treatment at different temperatures (overview (a1-e1), surface (a2-e2), cross section (a3-e3))
S2. SEM images of alumina ceramic continuous fiber at 1000 ℃ with different holding time (overview (a1-b1), surface (a2-b2), cross section (a3-b3))
4. FT-IR spectra (a), TG-DSC curves (b) of the gel fibers, and (c) XRD patterns of the fibers calcined at different temperatures
5. SEM images of surfaces and cross sections of the fibers calcined at different temperatures
6. TEM (a) and high resolution TEM (b) images of alumina ceramic continuous fiber with insets in (a) showing low magnification image and SAED pattern of the fiber
7. XRD patterns of alumina continuous fibers after heat-treatment under different conditions
Table 1. Densities and strengths of fibers calcined at different temperatures
View tableView in ArticleTable 1. Densities and strengths of fibers calcined at different temperatures
Calcination conditions Tensile strength/GPa Cv of tensile strength/% Density/(g·cm-3) Crystalline size/nm Phase composition 900 ℃/30 min 1.5 12.33 2.86 9.80 γ-Al2O3 + amorphous 1000 ℃/30 min 1.6 11.26 2.91 10.36 γ-Al2O3 + amorphous 1100 ℃/30 min 2.0 12.68 2.95 10.77 γ-Al2O3 + amorphous 1200 ℃/30 min 1.4 12.17 2.85 11.63 γ-Al2O3 + amorphous
Table 2. Mechanical properties of alumina continuous fibers after heat treatment under different conditions
View tableView in ArticleTable 2. Mechanical properties of alumina continuous fibers after heat treatment under different conditions
Calcination conditions Shrinkage ratio of diameter/% Tensile strength/GPa Cv of tensile strength/% Retention rate/% Phase composition Original fiber — 2.035 13.70 — γ-Al2O3 + amorphous 1000 ℃/1 h 0 2.002 12.89 98.38 γ-Al2O3 + amorphous 1100 ℃/1 h 0 1.933 13.01 94.99 γ-Al2O3 + amorphous 1200 ℃/1 h 0.82 1.842 14.02 90.52 γ-Al2O3 + amorphous 1300 ℃/0.5 h 1.95 1.579 14.57 77.59 Mullite +γ-Al2O3 + amorphous 1400 ℃/0.5 h 2.36 0.419 15.03 20.59 Mullite 1000 ℃/20 h 0.28 1.926 13.24 94.64 γ-Al2O3 + amorphous 1000 ℃/40 h 1.66 1.857 13.95 91.25 γ-Al2O3 + amorphous
Tools
Get Citation
Copy Citation Text
Yuna JIA, Xu CAO, Xiuling JIAO, Dairong CHEN.
Paper Information
Category:
Received: Mar. 27, 2023
Accepted: --
Published Online: Mar. 6, 2024
The Author Email: CHEN Dairong (cdr@sdu.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20