Black SiC Powder

Offering black silicon carbide powders for the abrasive wheel, slurry, refractory and ceramic industries, as well as rock tumbling blends.

Powders are specifically manufactured to be used for general abrasive applications in bonded abrasive tools, lapping and polishing processes. With a lower hardness and abrasive capacity than diamond or boron carbide, it is widely used for grinding nonferrous materials, finishing tough and hard materials, as well as filling up ceramic parts due to its lower cost. It is commonly used in the following applications:

Common Uses:

• Silicon carbide powders are used heavily in ceramic, metal lapping, and polishing applications:
  
• Slicing of silicon carbide wafers
• Rock and stone polishing and engraving
  
• Slicing, lapping, and polishing glass and germanium wafers
  
• Lapping of piston rings and gears
  
• Grinding of nonferrous materials
  
• Finishing tough and hard materials
  
• Bonded abrasive tool applications
  

Sizes Available: Grit sizes range from coarse grades down to a 1500 mesh size.

Note: We do not sell silicon carbide disks or forms other than the actual loose sandblasting abrasive grits and powders.

Technical data

• Structure : Monocrystalline
  
• Particle shape: Blocky, sharp edged
  
• Color: Black
  
• Friability: Semi-friable
  
• Knoop hardness (100 scale): 2480
  
• Bulk density: ANSI B74.12-1988
  
• Specific gravity: 3.20
  

Particle Size distribution for available grits:
Grading: FEPA Standard

Slurries and Vehicles Available:  Both glycol and water based vehicles are available, as well as premixed slurries according to your specifications. Light, medium, and heavy viscosity's are available. Our slurries and vehicles are also appropriate for boron carbide and diamond powders. We can either premix the slurry for you, or simply sell you the vehicle, and you mix yourself.

On-Line Order Guidelines:

• 50lbs minimum order for most grades other than F1200 and 1500.
• Shipping for small orders (200 lbs or less) is via UPS Ground.  UPS charges $7.50 per pail additional handling, which is why the freight charges might seem high.
• Packaging is in plastic pails and/or fiber drums with plastic liners. Palletized as needed.
• Sales tax for CO and CA orders will be charged. If you have a resellers permit, please fax it to us @ 970-692-2278. We will credit back the cost of the sales tax upon receipt.
• If you do not know the grit size you need, please indicate "average micron" size and we will screen a product for you, or match it up with a FEPA standard size.
• View our selection of black silicon carbide powders now.

Green Silicon Carbides - Green Vs Black - What's the difference? 

Black SiC is a man made mineral with a high thermal conductivity rating of 100 W/m-K. It is extremely hard, around a Mohs 9.1 or 2550 Knoop. It has high strength at elevated temperatures. For example, at 1000oC, SiC is 7.5 times stronger than Al203 (aluminum oxide). Black SiC will contain some free silicon and carbon and thus is not as pure as green SiC. Black will range in purity from 97-99% pure, depending on grit size. Green SiC is made from Silica sand and coke, and is extremely pure. Hexagonally shaped, it breaks into very sharp particles. Our green SiC is 99.5% pure, exceeding JIS, ISO, & FEPA standards.

Green SiC is harder than black, coming in at a 9.4 Mohs and 2600 on the Knoop scale. Green is often the media of choice when it comes wire sawing. The micronization process of manufacturing our green SiC is controlled by a computer. Then the material is water classified/separated - this produces a very tight particle size distribution, as well as a reduction in fines, as preferred for accurate wire sawing applications. Unless your application requires an extremely pure SiC, by default, black is preferred due to its more economic pricing.