白剛玉是以氧化鋁為原料,經高溫熔煉而成。呈白色,硬度比棕剛玉略高,韌性稍低。用其制造的磨具適用於高碳鋼、高速鋼和淬火鋼等的磨削。可作研磨拋光材料,還可作精密鑄造型砂、噴涂材料、化工觸媒載體、特種陶瓷、耐火材料等。
Al2O3(%) Na2O(%) F12-F80 ≥99.3 ≤0.45 F90-F150 ≥99.2 ≤0.45 F180-F220 ≥99.0 ≤0.45
基本礦物
Basic minerals
晶體尺寸
Crystal size
μm
真比重
True density
g/cm3
堆積密度
Bulk density
g/ cm3
顯微硬度
Knoop hardness
kg/mm2
α-Al2O3
600-1400
≥3.90
1.5-1.95
2200-2300
化學成份:Chemical composition
牌號(代號)
Code
粒度範圍
Grit size range
化學成分% Chemical composition%
Al2O3
TiO3
CaO
A
A-P1
F4-F80
(P12-P80)
95.0-97.5
1.5-3.8
≤0.45
F90-F150
(P100-P150)
94.0-97.5
F180-F220
(P180-P220)
93.0-97.5
F220(P220)以細finer
≥92.0
物理性能:
Physical property
基本礦物
Basic minerals
晶體尺寸
Crystal size
μm
真比重
True density
g/cm3
堆積密度
Bulk density
g/ cm3
顯微硬度
Knoop hardness
kg/mm2
α-Al2O3
300-12000
≥3.90
1.5-1.95
1800-2200
水洗棕剛玉P砂
Water-washed P grains of brown fused alumina
粒度號Grit size
清潔度Cleanness
AP50
120
AP80
130
棕剛玉整形砂
The shaped brown fused slumina
粒度號
Grit size
堆積密度
Bulk density
g/cm3
粒度號
Grit size
堆積密度
Bulk density
g/cm3
F24
1.8-1.95
F80
1.61-1.71
F30
1.77-1.90
F90
1.59-1.71
F36
1.75-1.90
F100
1.57-1.68
F40
1.73-1.86
F120
1.54-1.68
F46
1.70-1.84
F150
1.50-1.65
F54
1.68-1.82
F180
1.48-1.62
F60
1.66-1.80
F220
1.45-1.55
F70
1.63-1.76
鉻剛玉是以氧化鋁為主要原料,適配氧化鉻等。經高溫熔煉而成。呈粉紅色、硬度與白剛玉近似,韌性比白剛玉高。用其制造的磨具,度好,磨加工光潔度高。適用於量具,機床主軸,儀表零件、螺紋工件及樣板磨等精密磨削。
lts main material is bayer alumina,which is electrically fused in high temperature,being added with the right quantity of oxidized chromium. lt is pink.lts hardness is close to,but toughness higher than that or WA.The abrasive tools made of it feature excellent durability and high processing cleanness,which are suitable for the precision grinding of the measuring tools,lathe main shafts,instruments and apparatus parts,threading workpieces and samplers,etc.
化學成分:Chemical composition
低鉻
Low chromium
中鉻
Medium chromium
高鉻
High chromium
Al2O3
(%)
Cr2O3
(%)
Na2O
(%)
Al2O3
(%)
Cr2O3
(%)
Na2O
(%)
Al2O3
(%)
Cr2O3
(%)
Na2O
(%)
F12-F80
≥98.50
0.20-0.45
≤0.50
≥98.20
>0.45-1.00
≤0.55
≥97.40
>1.00-2.00
≤0.55
F90-F150
≥98.50
≤0.50
≥98.20
≤0.60
≥97.00
≤0.60