... %min, Ca 30%min, C 6%max, and used in copper, refractory industry and ceramic additive. Calcium BorideCaB6B 56%min, Ca ... %min, C 6%max Specification:1. for the copper industry: -20mesh2. for the refractory industry: -325mesh, -400mesh, -20um3. for ceramic additive: -10umalso supply the ...