By Material

PHOTO:ZrO2 Zirconia


Zirconia (Zirconium Oxide, ZrO2) 

Zirconia, mainly consisting of ZrO2, has the highest mechanical strength and fracture toughness at room temperature of all major fine ceramics. It is used to make cutting blades, scissors and knives. It is also used for pump parts due to its superior surface smoothness.


Zirconia has excellent mechanical properties, with higher strength and fracture toughness than alumina.
It is also used in milling machines, sliding parts and cutting blades.
Zirconia exhibits great heat insulation, as its thermal conductivity is less than 1/10 that of other ceramics.


Dimensional precision achieved by machining

When dimensional precision is required for machined ceramics, Kyocera is capable of achieving the tolerances as shown in the table below. If greater tolerances are required, please consult us.

■MACHINING DIMENSIONAL PRECISION(Data are in mm unless otherwise specified)

1.Ground ceramic blocks and plates
IMAGE:Standard tolerance chart of ground ceramic blocks and plates
2.Round and Square Bars
IMAGE:Standard tolerance chart of round and square bars


Ultra-precision is possible with Kyocera's unique techniques.
Precision machining is affected by shape and material.
Some practical examples are shown in the table below.
IMAGE:Machining accuracy chart of shape and material
* Surface roughness depends on the material. The data shown hear indicates where alumina is used.


IMAGE:Zirconia material characteristic chart
*The values are typical material properies and may vary according to products configuration and manufacturing process.
  For more details, please feel to contact us.

  • IMAGE:Bulk density chart
  • IMAGE:Hardness chart
  • IMAGE:Flexural strength chart
  • IMAGE:Compressive strength chart
  • IMAGE:Young's modulus chart
  • IMAGE:Flexural strength vs. temperature chart
  • IMAGE:Thermal expansion chart
  • IMAGE:Thermal conductivity chart
  • IMAGE:Heat shock resistance chart
  • IMAGE:Max. use temperature chart

IMAGE:Chemical resistance chart (30 min  boiling)

IMAGE:Unit conversion table of stress & Unit conversion table of thermal conductivity

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