生产黑刚玉抛光砂特价黑刚玉抛光砂

规格

主要化学成分%

Al2O3

Fe2O3

SiO2

一级

85

9

≤6

二级

80

10

≤10

项目

指标

颜 

黑

晶形

三方晶系

硬度（莫氏）

≥9.0

熔点（℃）

2050

高使用温度（℃）

1850

真密度（g/cm3）

≥3. 50

线膨胀系数（0—1600℃）

7—9

用于自由研磨，如制品电镀前的打磨工粗磨，主要用于不锈钢，金属制品，光学玻璃，竹木制品的抛光和喷砂，又是制造树脂砂轮，切割片，纱布的新颖磨料。本公司黑刚玉黑刚玉磨料本粒集中，切削力强，韧性大，刚柔相济，耐磨性好，工效高。是磨削抛光、喷砂不锈钢制品的理想产品。 

黑刚玉理化指标: 

黑刚玉物理性能指标：

Black corundum is also known as low aluminum corundum. It is also a new type product of polishing material, and it is a dark gray crystal body made α-Al2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.

Physical and Chemical Indicators:

Physical Performance Indicators: