DORFNER Analysenzentrum und Anlagenplanungsgesellschaft mbH
Scharhof 1, 92242 Hirschau
Fon: +49 9622 82-162
E-Mail: anzaplan@dorfner.com
Ceramics, technical ceramics, SiC, X-Ray, characterization

Ceramics

We know ceramics in construction for pipes, bricks, floor and roof tiles, in refractories for heat containment industries, and as whiteware for sanitaryware and porcelain, and as precisely engineered technical ceramics for electrical insulation amongst other high tech applications. Ceramic materials are made of oxides, non-oxides and composites derived from a range of minerals such as kaolin, ball clay, quartz, feldspar, bauxite, etc.

An example for an oxide ceramic is alumina (corundum, Al2O3), which is chemically very resistant and used in the form of crucibles. Another oxide is zirconia (ZrO2) that is made into balls and used in milling machines. A typical non‑oxide ceramic is silicon carbide (SiC), used in refractory materials, or ultrapure tungsten carbide (WC) for milling purposes.

Composites are a combination of oxides and non-oxides. A well known example is the carbon-ceramic (silicon carbide) composite disc brake. Sometimes two different oxides are combined (e.g. ZnO and Al2O3) to unite the properties from two materials. ZnO absorbs UV light and Al2O3 (corundum) can, owing to its hardness, avoid scratches when added to the lacquer during the lacquering process.

At ANZAPLAN, we use X-Ray diffraction, X-Ray fluorescence and wet chemical methods for the full characterization of the mineralogical and chemical properties of technical ceramics. A physical characterization of ceramic parts is carried out at our ceramic laboratory.