Breviary Technical Ceramics


      From Powder to Part




4.1.1 Raw Materials and Additives

The basic requirements of production and of using the most economic manufacturing process determine the choice of raw materials (in terms of type, purity, grain size and specific surface area), as do the supplementary ingredients.

With their distribution and purity, additives such as

  • (inorganic) sintering aids

and the (usually organic) forming aids, such as

  • liquefaction agents,
  • plasticisers or
  • binders

are as significant as the raw materials themselves.

Figure 50: Coarse Al2O3 powder                             Figure 51: Fine Al2O3 powder


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