The Kreutzonit® products

Zircon opacifiers have been used in the ceramic industry for many years, especially in the production of tiles and sanitary products.
Helmut Kreutz GmbH has provided non-ferrous grinding and micronizing of minerals for more than 70 years.
Micronized zirconium silicates from Kreutz GmbH are used in the ceramic industry throughout the world. Our goal is to win, strengthen and extend our customers’ trust through our top-quality products.

10 micrometers— D50 = 2,0 micrometers
D50 = medium particle size

Chemical and physical properties

ZrO2 64-65,5 %
SiO2 33-34 %
Fe2O3 0,10 % max
TiO2 0,15 % max.
Specific weight 4,6 g/cm3
Melting point 2.200 °C
Mohs hardness 7,5

Areas of use
Ceramic industry, as a zircon opacifier for engobes and glazes, Glass industry, Refractory industry, Insulation material

8 micrometers— D50 = 1,5 micrometers
D50 = medium particle size

Chemical and physical properties

ZrO2 64-65,5 %
SiO2 33-34 %
Fe2O3 0,10 % max.
TiO2 0,15 % max.
Specific weight 4,6 g/cm3
Melting point 2.200 °C
Mohs hardness 7,5

Areas of use
Ceramic industry, glazes, tiles, sanitary products and other areas of use

5 micrometers— D50 = 1,0 micrometers
D50 =  medium particle size

Chemical and physical properties

ZrO2 64-65,5 %
SiO2 33-34 %
Fe2O3 0,10 % max
TiO2 0,15 % max.
Specific weight 4,6 g/cm3
Melting point 2.200 °C
Mohs hardness 7,5

Areas of use
Ceramic industry, glazes, tiles, sanitary products and other areas of use

4 micrometers— D50 = 0,8 micrometers
D50 = medium particle size

Chemical and physical properties

ZrO2 64-65,5 %
SiO2 33-34 %
Fe2O3 0,10 % max
TiO2 0,15 % max.
Specific weight 4,6 g/cm3
Melting point 2.200 °C
Mohs hardness 7,5

Areas of use
Ceramic industry, glazes, tiles, sanitary products and other areas of use

Zirconium silicates

Zircon sand
… from different deposits, calcined or uncalcined. (ceramic and foundry quality)

Zircon flour
…in the standard flour finenesses of 20, 45, 63, 75 and 90 micrometres and all customer-specific fineness grades.






Zirkonmehl Zertifikat


CERTIFICATE OF ANALYSIS Air Sieving
ZIRCON FLOUR 170 MESH

(90 MICRON)

 TYPICAL PARTICLE SIZE: R max 5,0% 90my
ZIRCON FLOUR 200 MESH

(75 MICRON)

 TYPICAL PARTICLE SIZE: R max 5,0% 75my
ZIRCON FLOUR 250 MESH

(63 MICRON)

 TYPICAL PARTICLE SIZE: R max 5,0% 63my
ZIRCON FLOUR 325 MESH

(45 MICRON)

 TYPICAL PARTICLE SIZE: R max 2,0% 45my
Laser Granulometry
ZIRCON SILICATE

20 MICRON

 TYPICAL PARTICLE SIZE: d50/μm: 3-3,5


Micronized zircon
see Kreutzonit® Produkte

Areas of Use:
ceramic frits and glazes, as zircon washes in foundries, refractory industry for zircon bricks and zircon masses