氧化铝陶瓷包括氧化铝(95%)高纯氧化铝(99%) 金属氧化铝(金属陶瓷)(主要是含Fe)是经过高温培 烧而成的摩擦付材料。氧化铝除不耐氢氟酸及浓碱外, 能耐一般介质腐蚀,但氧化铝脆性大,温度聚变会发 生开裂等现象。
The Alumina Ceramic are sintered into the friction material after high temperature. It includes A12O3(95%), high pure A12O3(99%),metal A12O3 (metal ceramic) (mainly contains Fe). Alumina can resist the general corrosion medium except hydrofluoric acid and dense alkali. But fragility of Alumina is very high, so it can be fractured with great changing temperature
性能 Performanace | 95%AI2O3 | 99%AI2O3 | AR—Fe (金属陶瓷) |
密度g/cm3 Density (g/cm3) | 3.6 | 3.8 | 4 |
硬度(HRA) Hardness (HRA) | 82 | 87 | 84 |
抗弯强度(Mpa) Bens strength(Mpa) | 2400 | 2600 | 3000 |
热传导系数(Wm/k) Thermal codutivty(Wm/k) | 8~20 | 0.5〜0.7 | 20 〜40 |
热膨胀系数x io-6/.c Coefficent of heat expansion X 10-6/^ | 16 〜18 | 16 〜18 | 25 〜30 |
氧化铝陶瓷主要性能指标
AL2O3含量 密度g/m 抗弯强度 硬度HRA 热传导系数w/mok 热膨胀系数×10 1/℃
99% 3.85 340-540 85-90 16.75 5.3
95% 3.65 216-360 78-82 16.75 5.8
氧化铝陶瓷的化学成份
AI2O3 Fe2O3≤ Na2O ≤ Fe ≥
AL2O3-99 ≥98 0.1 0.3
AL2O3-95 94-96 0.1 0.5
AL2O3-Fe ≥83 0.1 0.5 10