When the alumina fiber accounted for 10 % , the density of the composites was chiefly high and the fiber evulsion effect was reinforced ; when the alumina fiber accounted for 30 % , the fiber evulsion effect , fracture and bridge - connection effect were mainly strengthened , when the fiber proportion was 50 % , at the temperature of 1500 c , the bending strength reached 26 . 11 mpa while the compressive strength was 79 . 30 mpa 氧化铝纤维含量为10和30的试样增强机理不同，含量为10时，复合材料以基质密实度高、纤维拔出效应增强为主；氧化铝纤维含量为30时，复合材料以纤维拔出、断裂、桥联效应增强为主。当纤维含量为50时，在1500下烧成，其抗折强度达到26 . 11mpa ，耐压强度达到79 . 30mpa ，该复合材料可用作轻质保温材料。
