无机酸铝体系氧化铝连续纤维的制备技术研究

贾玉娜, 曹旭, 焦秀玲, 陈代荣

Preparation of Alumina Ceramic Continuous Fibers with Inorganic Acidic Aluminum Sol as Precursor

JIA Yuna, CAO Xu, JIAO Xiuling, CHEN Dairong

表2 不同条件热处理后氧化铝连续纤维的力学性能

Table 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