The abrasive liquid is composed of boron carbide powder (W40, particle size 26~36 um) and water-based lubrication fluid. It has excellent suspension stability, permeability and cleaning performance, and no large number of bubbles are generated during the use process.

Grinding fluid of these advantages make the suspension performance of boron carbide powder is very easy to permeate the sapphire crystal and grinding plate into the small gap Grinding gap in boron carbide distribution uniformity, good liquidity, high removal efficiency of grinding liquid is the main reason for the long service life In the present work reports the Z - W40 grinding fluid, in 16 b grinding machine, 90 g/cm2 pressure condition, about 2 inches in diameter of grinding to A sapphire, typical removal efficiency is 7.4 um/min, the surface roughness Ra is 0.35 um, service life can continuous processing 20 plate of sapphire.

To make performance comparison, we also use the industry commonly used in 240 # boron carbide abrasive grit (size is 56 to 64 um) mortar mix into water (DI - F240) grinding comparison At the same grinding conditions, typical of boron carbide slurry water removal rate is 2.5 ~ 3.5 um/min, the surface roughness Ra is 0.9 um, service life of 9 Due to this scenario using the finer grinding sand as abrasive, the smaller the roughness, can greatly shorten the subsequent processing, fine grinding time.