20年廠家直銷分離陶瓷膜用W28即600#白剛玉微粉 白剛玉微粉是以鋁氧化粉為原料，經(jīng)電熔提煉結(jié)晶而成， 純度高、自銳性好、耐酸堿腐蝕、耐高溫、磨削能力強、發(fā)熱量小、效率高、,熱態(tài)性能穩(wěn)定它硬度略高于棕剛玉，韌性稍低。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準確鑄造和高等耐火材料。 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. 一，主要物理特性Main Physical Properties 莫氏硬度 MOHS HARDNESS                  9.0 堆積密度 BULK DENSITY              1.75-1.95g/cm3 比重 SPECIFIC GRAVITY 3.95g/cm3 體積密度 3.60 用于磨料，研磨，拋光等 Used for abrasives ,lapping,Polishing        屬性 properties 規(guī)格  Type                            微粉  Micropowder W W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 W1.5 W0.5 FEPA F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000 JIS 240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000# 保證值Guarantee Value      典型值Typical Value 化學成分 Chemical Composition Al2O3                 ≥99    99.20 SiO2                 ≤0.1    0.08 Fe2O3                 ≤0.1    0.06 Na2O                 ≤0.4     0.32 W28即600#白剛玉微粉：