黑刚玉是于电弧炉中,将铝矾土熔炼而制得的一种以a-AL2O3和铁尖晶石为主矿相的灰黑色结晶体,具有韧性高、耐高温、热太性能稳定的特点。硬度適中,韌性較大,耐磨,棱角鋒利,自銳性強,拋光加工工件潔度高,廣泛適應於食具行業,電鍍行業,金屬表面處理行業,玻璃製品行業,目前,最為廣泛地應用於不鏽剛餐廚具,燈具燈飾摩托車零件,汽車配件等中等硬度材料的精細拋光。 特點 1.採用日本南興的設備和工藝,保證了一流的品質; 2.採用日本南興的檢測設備和手段,保證了品質的穩定; 3.自有的鋁礬土礦,保證了原料的穩定性; 4.顆粒集中,無大粒,使用時不會劃傷工件表面; 5.顆粒形狀好,磨削性能好; 6.清潔度高,無雜質粉塵; 7.強度高,提高使用壽命; 可供粒度 F16~F320 化學成份 | Al2O3 | SiO2 | Fe2O3 | TiO2 | F70 | 90.11 | 2.27 | 4.35 | 2.22 | F100 | 88.93 | 2.70 | 5.28 | 2.72 | F120 | 88.19 | 2.82 | 5.40 | 2.98 | F150 | 87.89 | 2.96 | 5.36 | 3.48 | F180 | 86.47 | 3.33 | 5.58 | 4.02 |
物理性能 基本礦物質 | 真比重 g/cm3 | 堆積密度 g/cm3 | 硬度 Kg/mm2 | 熔點 | 最高使用溫度 | α- Al2O3 | ≥3.50 | 1.40~1.85 | 2000~2200 | 2000℃ | 1800℃ |
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基本粒集中,切削力强,韧性大,刚柔相济,耐磨性好,工效高。是磨削抛光、喷砂不锈钢制品的最理想产品 黑刚玉理化指标: 规格 | 主要化学成分% | Al2O3 | Fe2O3 | SiO2 | BA—Ⅰ | 81—85 | 9—11 | ≤8 | BA—Ⅱ | 75—80 | 10—12 | ≤10 |
| 黑刚玉物理性能指标: | | 项目 | 指标 | 颜 色 | 黑色 | 晶形 | 三方晶系 | 硬度(莫氏) | ≥9.0 | 熔点(℃) | 2050 | 最高使用温度(℃) | 1850 | 真密度(g/cm3) | ≥3. 50 | 线膨胀系数(0—1600℃) | 7—9 |
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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. Black corundum physical and chemical indicators: Specifications | MainChemical Composition% | Al2O3 | Fe2O3 | SiO2 | BA—Ⅰ | 81—85 | 9—11 | ≤8 | BA—Ⅱ | 75—80 | 10—12 | ≤10 |
Black corundum physical performance indicators: Item | Indicators | Color | Black | Crystal | Trigonal system | Hardness (Mohs) | ≥ 9.0 | Melting point (℃) | 2050 | The maximum temperature (℃) | 1850 | True Density (g/cm3) | ≥ 3. 50 | Linear expansion coefficient (0-1600℃) | 7-9 |
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