Features

 Oxide Ceramics Information

Oxide ceramics are inorganic compounds of metallic (e.g., Al, Zr, Ti, Mg) or metalloid (Si) elements with oxygen. Oxides can be combined with nitrogen or carbon to form more complex oxynitride or oxycarbide ceramics.

 

Oxide ceramics have high melting points, low wear resistance, and a wide range of electrical properties.


The minerals used to make these ceramic materials are crushed or ground into a fine powder that is purified by adding it to a solution and allowing a chemical precipitate to form.

 

The precipitate is then separated from the solution and heated to form a highly pure powder. Minerals can also be processed in an arc furnace and atomized or cast and crushed to form oxide ceramic powders and fused abrasive grain.

 

Molding Processes

 

After purification, small amounts of water, wax or plastic resin are added to bind the ceramic powder. Plastics may also be added to provide pliability. The powder can then be shaped into different objects by various molding

 processes such as:

 

  • Slip casting
  • Pressure casting
  • Injection molding
  • Cold isostatic pressing
  • Mechanical pressing
  • Extrusion

Oxide Ceramics Information

Molding processes are used to form a green ceramic body or part. After oxide ceramic materials are molded, the binder is thermally removed in an oven.

 

The baked-out green ceramic parts are heated or fired in a high temperature furnace to sinter the ceramic particles, which results in densification and strengthening of the material.

 

Hot pressing or hot isostatic pressing can be used to form and/or densify sintered ceramic parts or canned binderless powder to a high or 100% theoretical dense state.

 

Standards

 

BS EN ISO 21078-1 - Determination of boron (III) oxide in refractory products - part 1: determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes. 

 

BS ISO 11894-1 - Fine ceramics (advanced ceramics, advanced technical ceramics) - test method for conductivity measurement of ion-conductive fine ceramics part 1: oxide-ion-conducting solid electrolytes.

 

DIN EN ISO 21078-1 - Determination of boron (III) oxide in refractory products - part 1: determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes. 

 

ISO 11894-1 - Fine ceramics (advanced ceramics, advanced technical ceramics) - test method for conductivity measurement of ion-conductive fine ceramics - part 1: oxide-ion-conducting solid electrolytes. 

 

References

 

 

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