白剛玉(white fused alumina) 

白剛玉是以優質鋁氧化粉為原料，經電熔提煉結晶而成， 純度高、自銳性好、耐酸堿腐蝕、耐高溫、熱態性能穩定它硬度略高于棕剛玉，韌性稍低，純度高、自銳性好、磨削能力強、發熱量小、效率高、耐酸堿腐蝕、耐高溫熱穩定性好。用其制成磨具，適用于磨削高碳鋼、高速鋼及不銹鋼等細粒度磨料還可以用于精密鑄造和高級耐火材料。

White Fused Alumina was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3.The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved.

Al2O3

≥99.55%

Fe2O3

≤0.04%

SiO2

≤0.04

Na2O

≤0.22%

堆積密度（Bulk density）

1.75-1.95g/cm3

顆粒密度（Grain density）

≥3.90g/cm3 min

莫氏硬度（Morse hardness）

≥9

用途(Usage)

其適用于磨削高碳鋼、高速鋼和淬火鋼等硬度較硬、抗張強度較大的材料的磨削。等。還可作為研磨；精密鑄造、噴涂材料，化工觸媒載體，特種陶瓷、，煉鋼，高級耐火材料等。它的特點是切削力較強，化學穩定性好，具有很好的絕緣性

Refractory material; polishing material; Casting; Painting material; Grinding material; Sandblasting material,etc