棕剛玉Brown Fused Alumina是以鋁礬土、無煙煤為主要原料，在2000度以上電弧爐內經高溫冶煉而成，用它制成的磨具，適于磨削抗張較高（鋼材、可鍛鑄鐵、應青銅等）的金屬，適用于制造陶瓷、樹脂高固結磨具以及研磨、拋光、噴砂、鑄造等，也可制造耐火材料。棕剛玉具有純度高，結晶好，流動性強，線膨脹系數低，耐腐蝕、耐高溫、高強度等特點。

Brown fused alumina is made of bauxite, anthracite coal, and smelted in electric-arc furnace of high temperature more than 2000 degrees. Abrasives tools made by brown fused alumina are suitable for metal with high tensile(like: steel, malleable iron, bronze etc). Suitable for product high consolidation abrasive, and suitable for grinding, polishing, blasting, precision casting etc. brown fused alumina is also used for refractory material. Brown fused alumina with characteristics like: high purity, good crystalline liquidity, low coefficient of linear expansion, corrosion resistance, high temperature, high strength. 

Al2O3

≥95.0%

SiO2

≤1.5%

TiO2

≤3%

Fe2O3

≤0.5%

等級

硬度

≥9

堆積密度

≥1.75 g/cm3

顆粒密度

≥3.97g/cm3

磁性物含量

≤0.038%

用途

陶瓷樹脂磨具，噴砂，研磨和拋光，并廣泛應用于防滑耐磨跑道，耐高溫基本鍍成，冶金化工等工業窯爐的耐火材料，是噴砂除銹，清理工件，研磨拋光等理想材料