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　白剛玉是以氧化鋁為原料，經(jīng)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于高碳鋼、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。
　　lts main.raw material bayer alumina.which is electrically fused in temperature.lt is white and its hardness is higher,but toughness lower than that of brown fused alumina.The abrasive tools made of it are suitable for the grinding of high carbon steel,high speed steel and chilled steel.lt also be used as polishing materials and precision precision founding sand,spraying and coating materials,catalyst carrier,special ceramics and super refractory materials.

化學(xué)成分：
Chemical composition

Al₂O₃（%）	Na₂O(%)
F12-F80	≥99.3	≤0.45
F90-F150	≥99.2	≤0.45
F180-F220	≥99.0	≤0.45

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	600-1400	≥3.90	1.5-1.95	2200-2300

呈白色，較棕剛玉硬而脆，切削力較強(qiáng)。化學(xué)穩(wěn)定性好，具有很好的絕緣性。顯微硬度2200-2300kg/mm²。

　　可做固結(jié)磨具及涂附磨具，濕式或干式噴射砂，超精研磨及制作耐火材料等。適合加工淬火鋼、合金鋼、高速鋼、高碳鋼等硬度較強(qiáng)、抗張強(qiáng)度較大的材料。也適應(yīng)壓電晶體、半導(dǎo)體、單晶硅、多晶硅的研磨拋光，還可用作觸媒體、絕緣體、特種陶瓷以及耐火材料等。

棕剛玉是以鋁礬土為主要原料，經(jīng)高溫溶煉而成。呈棕褐色、硬度高、韌性大。用其制造的磨具，適用于碳素鋼、可鍛鑄鐵、硬青銅等的磨削。此外在耐火材料、化工添加劑、精密鑄造及防滑材料等方面也有廣泛應(yīng)用。
　　The main material lr brown fused alumina is bauxite.which is electrically fused in high temperature.it is brown and featured high hardness and toughness.The abrasive tools made of it are suitable for the grinding of carbon steel.malleable cast iron,hard bronze.etc.ln addition.they are used as refractory materials,chemical additive,precision founding and anti-sliding materials.

化學(xué)成份：Chemical composition

牌號(hào)（代號(hào)）　Code	粒度范圍 Grit size range	化學(xué)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(xì)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(hào)Grit size	清潔度Cleanness
AP50	12⁰
AP80	13⁰

棕剛玉整形砂
The shaped brown fused slumina

粒度號(hào) Grit size	堆積密度 Bulk density g/cm³	粒度號(hào) 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（PA）
PINK　FUSED　ALUMINA（PA）

鉻剛玉是以氧化鋁為主要原料，適配氧化鉻等。經(jīng)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。適用于量具，機(jī)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(xué)成分：Chemical composition

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