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Processing ceramics – Polishing of deep hole, inner surface of hole, flat surface, outer surface of cylinder, etc.

Property of ceramics

Alumina ceramics

Composition Al2O3
Structure Sintered compact
Mechanical property Tensile strength: 0.12 to 0.21GPa
Bending strength: 0.2 to 0.7GPa
Compressive strength: 2.5 to 4.4GPa
Young’s modulus: 260 to 380GPa
Hardness: HV 1,000 to 2,300
*Value for reference
Feature
  • Alumina ceramics is a typical ceramics with high hardness.
  • Excellent insulating property.
  • Excellent low wear coefficient.

Zirconia ceramics

Composition ZrO2
Structure Sintered compact
Mechanical property Tensile strength: 0.14GPa
Bending strength: 0.8 to 1.7GPa
Compressive strength: 2.9 to 3.9GPa
Young’s modulus: 180 to 220GPa
Hardness: HV 1,200 to 1,500
*Value for reference
Feature
  • Zirconia ceramics has a high hardness with toughness.
  • Excellent insulating property.
  • Excellent low wear coefficient.

ceramics - Processed examples

Processed examples

Ceramics is a material with high abrasion resistance and excellent low wear coefficient. Alumina ceramics is a typical ceramics with high hardness, on the other hand, zirconia ceramics has a extreme hardness and toughness as well.

As ceramics is able to form a designated shape by sintering, it is possible to make a deep hole with high precision (Depth: 10 x hole diameter) by processing pipe materials. Furthermore, it is also possible to process complexed shapes and to polish up flat surface and outer surface of cylinder.

Processing ceramics

data of processing ceramics

Alumina ceramics

Half-cutting picture of a deep hole

  • Circularity of hole: 0.7µm
  • Diameter of hole: polishing withφ0.21mm × 11.5mmL
  • Diameter of hole: Processing with range5µm(φ0.21 to φ0.215mm)

data of processing ceramics

Polishing deep hole of alumina ceramics:
Hole diameterφ0.2135 Circularity 0.7µm

data of processing ceramics

Zirconia ceramics

Guide of zirconia ceramics
(Half cutting picture)
  • Tapered V surface: Polish up
  • Tapered surface roughness: Ra0.0173µm

data of processing ceramics

Zirconia ceramics inner surface polish:
Surface roughness Ra0.0173µm

Examples of uses of ceramics

Machining technology

materials