白刚玉是以优质氧化铝粉原料,经电熔提炼结晶而成,Al2O3的含量高于98.5%以上,它的硬度略高于棕刚玉,韧性稍低、纯度高、自锐性好、磨削能力强、发热量小、效率高、耐酸碱腐蚀、耐高温1750度以上,热稳定性好。白刚玉,白刚玉微粉及用途
通常所说的“熔融氧化铝”一般是指“电熔白刚玉”。是以煅烧氧化铝或工业氧化铝为原料,在电弧炉内高温熔化而成,Al2O3≥98.5%,白色块料,显气孔率6%—10%,主晶相为α- Al2O3,晶体为长条形和菱形,而且往往呈骸状晶体。由于原料纯度高,在电炉作业中不发生化学反应,但熔融液体的温度、冷却速度等对块料的结构有很大的影响。在均质方面,重要的是获得尽可能致密的块料。白刚玉,白刚玉微粉及用途
Al2O3含量(%) |
Al2O3≥98.5 |
主晶相 |
α- Al2O3 |
色泽 |
白色 |
体积密度(g/cm3) |
≥3.90 |
堆积密度(g/cm3) |
1.75-1.95 |
膨胀系数(×10-6℃-1) |
8.3(20~900℃) |
莫氏硬度 |
9 |
显微硬度(kg/mm2) |
2200~2300 |
研磨能力(以金刚石为1) |
0.12 |
比电阻(Ω·cm) |
1014~1016 |
白刚玉微粉性能:白色,较棕刚玉硬而脆,切削力较强,化学稳定性好,具有很好的绝缘性。
适用范围:可做固及涂附磨具,湿式或干或喷射砂,适合晶体,电子行业的超精研磨和抛光及制做高级耐火材料等。适合加工淬火钢,合金钢,高速钢,高碳钢等硬度较硬,抗张强度较大的材料。还可用做触媒体,绝缘体以及精密铸造砂等。白刚玉,白刚玉微粉及用途
Property:It is white and harder and more brittle than A.It features strong cutting force and steady chemical property and execllent insulation.
Usage:It can be used for making bonded and coated abrasive tools,wet or dry blasting.It is also suitable for superprecision grinding and polishing of crystal and electronic induxtry and making high quality refractory materials.It can be adopted for the grinding of the hard and strong bending strength materials such as chilled steel,alloy steel,high-speed and high carbon steel.Meanwhile,it can be used as catalyst carrier,insulator and presicion founding sand,etc.