Cubic Zirconia

• ZrO ₂Si
• Density 5,65
• Fusion Temperature 2700°C
• Thermal expansion 2,33
• Thermal expansion 2,33
• Hardness 8,5 mohs.
• Refractive index nd 2,177
• Dispersion factor 0,065
• At the customer's request, we can produce spheres out of several different crystals as far as the hardness is sufficiant, for example :Spinel, Yag, Silicium,...

• Basic diameter: The size ordered which is the basis to which the basic diameter tolerances apply. The basic diameter is specified by a fraction plus a decimal or a decimal only to the sixth place. (example: 1/4'' + .0002'' or .2502'' - 15/64'' +<br> .0003'' or .234675'').
• Basic diameter tolerance: The maximum allowable deviation of any ball diameter from the basic diameter, in any shipments to fill orders for that basic diameter.
• Diameter tolerance per ball: The permissible difference between the largest diameter and the smallest diameter measurable on one ball.
• Diameter tolerance per unit container: The permissible range of the average diameters of the individuals balls within any one unit container.
• Grade: The numerical value of the diameter tolerance per ball expressed in a millionth of an inch.
• Marking Increments: The standard unit steps in a millionth of an inch used to express the specific diameter.
  Some materials prevent us from obtaining a better result
  of tolerance than those obtained at level 10. On the other
  hand, some materials, mainly ceramics, make it possible
  to obtain dimensions with a level 4 or 5 , RA is then
  higher than in the above table.