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SILICON CARBIDE POWDER

ALUMINA OXIDE POWDER

NANKO EMERY

SILICON CARBIDE POWDER

These are produced by joining silica-base material and carbon in an electric resistance furnace then by crushing, milling, treating with chemicals, washing and screening to the desired particle size.

NGC (Green Silicon Carbide) (#240~#8000) This product is produced by using Green crystallized SiC, minimum content 99.5%. It is designed for use in lapping and sawing applications where precision finishes are required such as cutting and lapping quartz crystals, single crystal ferrite and alumina ceramics. Also it uses as a base materials for modern ceramics.     NC (Black Silicon Carbide) (#240~#4000) This product is produced by using Black crystallized SiC, minimum content 98.5%. It is widely used in refractory to precision industries because it is extremely high in hardness and tuffness. It is mainly used in bonded and coated abrasive products for the automobile Industory, steel Industory and also for the electronic Industory in items such as aluminum magnetic discs and magnetic heads.

Hardness Comparative Table 1 Agalmatolite 9 Topaz 1340 2 Gypsum 32 10 Garnet 1400 4 Fluorspar 163 11 Corundum 1800 6 Feldspar 560 12 Aluminum Oxide 2100 7 Silica 820 13 Silicon Carbide 2500 8 Crystal 1150 15 Diamond 7000 =New Mohs Scale =Knoops Scale   Chemical Analysis (Typical) Silicon Carbide NGC NC Grit Size #240 #1000 #240 #1000 SiC 99.5% 99.0% 98.5% 96.5% F.C 0.1% 0.1% 0.2% 0.2%

FUSED ALUMINA POWDER

These are produced by processing Alumina or bauxite in an electric furnace then by crushing, milling, treating with chemicals, washing and screening to the desired particle size.

WA (White Fused Alumina) (#240~8000) This product is manufactured from Al2O3, minimum content 99.7% crystals. It is suitable for making vitrified grinding wheels for special hard steel with high tensile strenghth, metalloid materials. It is also used for specific refactory applications.   A (Brown Fused Alumina) (#240~#4000) This product is manufactured from Al2O3, minimum content 97.0%. It is mainly used for precision lapping and optical finishing.

Chemical Analysis (Typical) Fused Aluminum Oxide WA A Grit Size #240 #1000 #240 #1000 Al2O3 99.7% 99.6% 97.0% 96.6% SiO2 0.05% 0.05% 0.5% 0.8% Fe2O3 0.02% 0.02% 0.1% 0.1% TiO2 0.01% 0.01% 2.3% 2.3%

NANKO EMERY 'AE' 1. About Nanko Emery (AE) Nanko Emery (AE) is a gray-black man-made abrasive mainly composed of crushed aluminum oxide. Nanko Emery is highly evaluated for its stable quality world wide. 2. Characteristic Nanko Emery is high in hardness, toughness and has function of self-sharpening. It is of high efficiency and excellent durability. Nanko Emery is virtually impurity-free, thus its clean surface combines well with various binders and maintains long life. 3. Applications Suitable for buffing stainless steel and also coated abrasives, direct mixture for sand blast, etc.   4. Typical data: 1) Grain sizes Nanko Emery grain sizes have been specifies by Nanko, which are different from JIS specification. 2) Chamical Composition (Typical) 3) Phisical Analysis 4) Particle shape       5. Packagee net weight: 25kgs (3 layered paper bag placed in an export carton box) (#) Mesh Number 60 70 80 90 100 120 150 180 200 220 250 280 320 400 600 800 1000 1200 Mesh # AI2O3 SIO2 Fe2O3 TiO2 lg Loss #150 83.80 7.79 5.20 3.15 -0.40 #200 83.10 8.09 5.38 3.24 -0.50 #250 82.45 8.21 5.67 3.56 -0.55 #150 #200 #250 Specific Garvity 3.91 3.88 3.85 Bulk Density 1.78 1.70 1.62