氧化鋁陶瓷包括氧化鋁（95%）高純氧化鋁（99%） 金屬氧化鋁（金屬陶瓷）（主要是含Fe）是經(jīng)過(guò)高溫培 燒而成的摩擦付材料。氧化鋁除不耐氫氟酸及濃堿外, 能耐一般介質(zhì)腐蝕，但氧化鋁脆性大，溫度聚變會(huì)發(fā) 生開(kāi)裂等現(xiàn)象。
The Alumina Ceramic are sintered into the fric tion 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 hydrof luoric acid and dense alkali. But fragility of Alumina is very high, so it can be fractured with great chang ing temperature
性能 Performanace | 95%AI2O3 | 99%AI2O3 | AR—Fe （金屬陶瓷） |
密度g/cm3 Density (g/cm3) | 3.6 | 3.8 | 4 |
硬度(HRA) Hardness (HRA) | 82 | 87 | 84 |
抗彎強(qiáng)度(Mpa) Bens strength(Mpa) | 2400 | 2600 | 3000 |
熱傳導(dǎo)系數(shù)(Wm/k) Thermal codutivty(Wm/k) | 8~20 | 0.5?0.7 | 20 ?40 |
熱膨脹系數(shù)x io-6/.c Coefficent of heat expansion X 10-6/^ | 16 ?18 | 16 ?18 | 25 ?30 |
氧化鋁陶瓷主要性能指標(biāo)
AL2O3含量 密度g/m 抗彎強(qiáng)度 硬度HRA 熱傳導(dǎo)系數(shù)w/mok 熱膨脹系數(shù)×10 1/℃
99% 3.85 340-540 85-90 16.75 5.3
95% 3.65 216-360 78-82 16.75 5.8
氧化鋁陶瓷的化學(xué)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