白剛玉廠(chǎng)家直銷(xiāo)白剛玉F砂涂附磨具砂紙砂帶紗布用白剛玉P砂 P砂主要用于涂覆磨具，其砂粒形狀多銳角針狀，堆積密度相對較低，其粒度分布較為集中 F砂用于固結磨具，砂粒形狀為顆粒狀或所謂寶石狀，堆積密度高   白剛玉是以鋁氧化粉為原料，經(jīng)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(tài)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(fā)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鑄造和耐火材料。 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.    屬性properties         規格Type               粒度砂Grains 8# 10# 12# 14# 16# 20# 22# 24# 30# 36# 40# 46# 54# 60# 70# 80# 90# 100# 120# 150# 180# 220# 保證值 Guarantee Value 典型值Typical Value  化學(xué)成分  Chemical Composition Al2O3        ≥99      99.50 SiO2        ≤0.2      0.04 Fe2O3        ≤0.2      0.04 Na2O        ≤0.30      0.23