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Quarzwerke - your partner for ceramics

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The Quarzwerke Group can look back on long and valuable experience gained in the extraction and processing of the raw materials quartz, kaolin and feldspar. As a result of this we are able to offer a first-class basis for the ceramic industry. Despite our already existing and pronounced expertise in this area, we attach great importance to continuing with optimization of the quality properties and processing properties of our products. For this reason, our varied portfolio provides optimal solutions for all areas of ceramics. This is also reflected in the successful new product developments of recent years. Modern and highly effective production technologies make sure that our very high quality is sustained. Another advantage: thanks to our various production sites we are able to offer our customers optimized solutions in relation to the logistics. Put us to the test!

Various deposits are the basis of our success

Amberger Kaolinwerke has very individual mineralogical deposits. They are the basis for the high quality of our raw materials and also enable the processing and refining of products with very specific properties. Nearly all renowned tableware, sanitary ware, tile and stove-tile manufacturers, as well as the manufacturers of technical ceramics and insulators use for their compound and glaze batch compositions kaolin, kaolin fireclays, potassium feldspars and quartz powders from the company Amberger Kaolinwerke. We are proud of this.

The kaolin range includes the super white firing plastic kaolins with good rheological properties for tableware ceramics and kaolins with excellent liquification and fragmentation properties for the sanitary ware industry. In addition, these raw materials are also constituents in white firing and super white firing tile compounds. An extremely plastic product is therefore available specially for the production of large insulators. You can benefit from this!

Analysis methods

Chemical analysis: DIN 51001, X-ray fluorescence

Mineralogical analysis: X-ray diffraction

Particle size distribution:

  • Sedimentation in range < 45 µm Zellcheming: 
    Zellcheming method V/27.3/90 (Sedigraph 5100)
  • Wet screen residue:
    Zellcheming method V/27.6/90
  • Dry screen residue:
    DIN EN 933-10 (Alpine-air-jetscreen) for hard substance powder
  • Screen analysis:
    DIN 66165 for grading

pH-value: DIN EN ISO 787-9, solids content 10%

Viscosity Lehmann: Lehmann viscometer nozzle diameter 3,2 mm

Casting rate: Thickness after 30 min.

Contraction: Cast discs firing temperature 1410°C red. or 1250°C ox.

Brightness: ISO 2470, with filter element R 457 (Elrepho 450 X) cast discs firing temperature 1.410°C red. or 1.250 ox.

Modulus of rupture: Drying temperature 40°C, specimens cast with optimized deflocculant addition.

Sagging: Body rod, firing temperature 1410°C red. or 1250 ox.

Water absorption: DIN EN 993-1, determined on Kaolinchamotte-granulate 8-16 mm.

Melting behavior: Determined with Hot-stage microscope.