Zirconia Ceramic Zircon Glaze Opacifier

  typical physical properties :  melting point: greater than 4000f coefficient of thermal expansion: 4.2 x 10-6cm/cm/c hardness: 7.5 moh's scale thermal conductivity:14.5 btu/sq. ft./hr./f/in. index of refraction: 2.0 thermal stability: no change to 3090f (1700c)   average particle size :  1500 spectralux : 6.0 - 8.0 microns 3500 spectralux : 1.90 - 2.10 microns 4500 spectralux : 1.65 - 1.75 microns 5500 spectralux : 1.40 - 1.5- microns 6000 spectralux : 1.20 - 1.30 microns 7000 spectralux : 0.95 - 1.05 microns